Double Star Observations Made at the Lick Observatory in May, June and July 1889

Home , 28 Andromedae, 2 Andromedae, 34 Pegasi, 48 Cassiopeiae, 67 Ophiuchi, 72 Pegasi

ASTRONOMISCHE NACHRICHTEN. NZ 2956-57.

Double Star Observations made at the Lick Observatory in May, June and July 1889. By 5. w.BUl.lZhlZ7iZ. The following double star observations have been made since the preparation of the last preceding list (A. N. 2929-30), and principally in the months of May, June and July of the present year. Since that time the large telescope has been used the greater part of the time for other work. During the period mentioned, 62 new pairs have been discovered and measured; and measures made of 98 of the more interesting and difficult pairs from former catalogues; altogether comprising 628 separate measures. This work has been done with the 36inch equatorial with the exception of the measures of a few southern stars which could be more conveniently made with the smaller telescope. The present catalogue of new stars is the sixteenth in order of publication. These lists have appeared as follows : First Catalogue Nos. I to 81 Monthl. Not. March 1873 Ninth Catalogue Nos. 453 to 482 Monthl. Not. Dec. 1877

Second 8 > 82 L: 106 8 May 1873 Tenth )) )) 483 D 733 Memoirs R.bS Vol. 44

Third D D 107 m 182 > Dec. 1873 ~ Eleventh % B 734 B 775 Lick Obs. Publ. I Fourth D P 183 r 229 D June 1874 Twelfth B B 776 * 863 Washb. Obs. Publ. I Fifth )) P 230 D 300 D Nov. 1874 Thirteenth 3 B 864 a 1025 Memoirs R.A.S. VoI. 47 Sixth n )) 301 P 390 Astr. Nachr. No. 2062 Fourteenth B 1026 D 1038 Astr. Nachr. No. 2875 Sevenrh P P 391 m 436 D 2103 Fifteenth Y D 1039 P 1092 b a 2929-30 Eighth )) 3 437 P 452 hmer.;ourn. of Sc. J~ly1877 I Sixteenth 2 )) 1093 L) I 154 The present Catalogue, The places of the stars are given, as heretofore, for 1880. The instrument used in each observation is given .in the last column. New Double Stars. (Sixteenth Catalogue.) fl 1093. Lal. 375. p 1096. AOe. 534. R.4. oh I 4m43s Decl. + I ooI 9'. RA. 0~29~46~Decl. +57O51'

1889.630 i 55?8 , 0137 ~ 7 , 8 I 36 A and B. .633 57.8 I 0.42 7.5, 8 36 1889.594 2b5?2 .687 1 49.2 0.39 j 7.51 8.5 36 ' I .67 I 267.9 1889.65 543 039 7.3, 8.2 I I I I ,673 269.9 The following of three bright stars.

/3 1094. Lal. 655. RA. oh 23ll13sS Decl. +59" 19'.

1889.526 ~ 242.8 0.60 5 , 9 36

.534 , 244.3 j 0.81 ~ 6 , 9.5 36 .537 I 246.6 0.70 i, 6 , 10 36 .~ .- 1097. Radcl. 159. 1889.53 j 244.6 0.70 I 5.7 , 9.5 RA. oh 3on13oS Decl. +57" 21'. .. 1095. 28 Andromedae. 1889.594 72.1 RA. oh ~3~47~Decl. +29O 5'. a597 69.9 .608 7 1.5 1889.509 0.4 2.37 , 8 '3 36 j 5-5 ; .61 I 7 2.8 .512 0.1 1 2.33 5.5, 14 : 36 -___. I 889.60 .5'5 1 359.7 __I 2.55 j 5.5, 13 1 36 71.6 O.57 I 8*4~8.4 I 1889.51 I 0.1 1 2.42 1 5.5 , 13.3 I The magnitude in Radcl. is 7.4, and in DM. 7.0.

(Bd. 124, 4 2956 52

A and BC. I 889.583 265?3 60:'30 8.5, - I2 .58h 265.4 60.26 8.5, - 36 7889.594 I 7504 1 l2!'77 I 5 13.5 36 I 265.6 60.3 I I .608 i 12.61 6 13.5 36 _____.589 8.5 - I 36 ,611 I ;;.: 1 12.99 1 6 13.5 36 1889.58 265.4 60.29 8.5, - I The principal star is Radcl. 430, and is 1~41~f. d Cassiopeiae, and 2'58" n.

@ I 103. 44 Cassiopeiae. RA. 1~35~12'Decl. +59" 56'.

1.63 1 6.5, 12.5 I 36 1.81 j 6 , 13.5 1 36

p 1104. Groombridge 370. RA. 1~35~~51'Decl. +52"17'. p I 100. Lal, 21 55. RA. I 7"sS Decl. 4-60" r 8'. 1889.589 1 199.1 .6x1 I 195.2 1889.526 1 45.3 I '0.5' I 7.5 t 7.5 ! 36 ,616I 197.4 0.41 I 7.31 7.3 1 36 1889.60 1 197.2 Found with the 12inch. 1889.54 I 43.6 I 0.48 I 7.4 I 7.4 I @ 1105. Pleiades. 1x01. p Cassiopeiae. RA. 3h41m26s Decl. +23"49', RA. ih17~~27~ Decl. +67"30'. 1889.589 1 60.2 A and B. 034 ! 9.5, ro 36 ,594 I 58.4 0.33 1 8.8, 10 I 36 36 .689 j 54.6 II .__-______0.31 9.5, 1 36 36 1889.62 I 57.y 0.33 I 9.3, 10.3 i 36 a534 1 40.6 I 3 24 36 Rather difficult pair 1~4'f. and 413 n. of Alcyone. It 1889.52 I 41.2 I 3.19 is DM.+23?554. /3 I 106. Pleiades. A and C (= 2 R.4. 3h42m58s Decl. +23" 5 1'. 107.3 1 28.21 1889.594 51.7 I 0.40 I 1.5, 11.5 36 .526 I 107.2 ' 27.84 Difficult pair; too faint for the DM. Place from the

.534 ~ 107.4 I 28.10 Paris map of the Pleiades. It is 55' f. and 416 n. of 1889.52 I 107.4 , 28.01 28 Tauri (Pleione). p 1107. AOe, 12884. C and D (= 2' 117). RA. 13~20~36~Decl. -2 1'44'. I 1889.515 255.6 I 2.83 9-51 9.7 36 1889.35 I 1.36 8.5 ! XZ 255.0 ~ 8.5, .523 1 2.87 9.5 1 9.7 36 - 8.6, 8.6 12 .526 I 254.5 2.87 9.8, 10 36 -373 *375 -_ - I2 .534 253.9 2.88 9.5 I 9.7 36 1 I i 1.18 .378 8.5 8.5 i 36 1889.52 I 254.7 I 2.86 9.6, 9 8 .38I 0.98 -> - 136 The new star is not difficult. I 887.3 7 1.1 7 8.5 I 8.5 I

p 1102. AOe. ;lo, p I 108. B.A.C. 4631. RA. 13~46~32~Decl. -3594'. A and B. 1889.583 335.6 0.93 10.5, 10.5 12 1889.373 81.3 1.48 : 6 I 6 12 .586 335.3 0.82 10.5, 10.5 36 ,383 1 86.9 1 1.14 I 6 6 ' 36 .589 338.0 1 0.77 1 10 I0 --36 .386 I 83.9 1.21 1 -, - 1 36 1889.58 I 336.3 I 0.84 1 10.3, 10.3 1889.38 I 84.0 I 1.28 I 6 6 I 53 54

A and D (= HIV.24). #lr113. B.A.C.4886. 1889.383 35901 1 65125 -, 8.5 36 RA. 14~41~21~Decl. +2"32'. .386 I 359.0 1 65.18 -,-- - 36 _____.__- - 1889.397 ~ 13701 4!'63 6 , 11.5 36 1889.38 359.0 65.21 - , - .400 I 136.7 4.42 6.5, 12.5 36 A and C. ---.4O3 137.6 4.58 I 6 , 11.5 36 1889.386 168.2 27.5a -, 12 I 36 1889.40 137.1 I 4.54 I 6.2, 11.8 Magnitude in DM. 7.7. /3 I 109. DM. +502846. KA. 14~3~18~Decl. +5O14'. A and B. #l I I 14. B.A.C. 5090. RA. 21~42~Decl. -28O 27'. ,I 889.38 I 321.3 1.83 1 -, 13.5 ish .386 322.6 1.62 - 1 I4 A and B. 321.8 1 1.88 - , 13.5 .. - -397- . __ __ 12 1889.373 3'9.7 ' 0.73 , 7 9 7,s 1889.39 321.9 I 1.78 - I '3.7 -383 3253 I 0.52 , 7 * 7-3 36 A and C. .386 I 331.5 0.69 i 7 , 7 36 __ - -__ - - - - - I I 889.38 I 356.0 53.02 ' 9 , 9 1889.38 325.7 I 0.65 I 7 9 7.3 1

.386 356.1 , 53.02 ~ 9 1 9 .397 356.8 I 53.08 j 9 1 9 AB and C (= H, 4774).

1889.39 356-3 53.04 I 9 9 9 9.28 1 - , I1 1889.373 5.8 j 12 .383 6.2 ' 9.27 1 - , 9 I 36 8 I I 10. Taylor 6665. .386 7 . ~ k5 ' 9.09 - ~___9.5 I 36- KA. 14~I 2"'2gS Decl. -36O 18'. I 889.38 5.8 1 9.21 -, 9.8 I 1889.389 127.7 3.82 6.5, 12 1 I2 There seems to be no change in the angle of the 1310 4.00 I 7.5, 12.5' 12 .392 I wide pair, as Herschel found 8?5 in 1834. .408 133.3 1 4.02 1 7 1 12-51 12 1 889.39 130.7 I 3.95 1 7 01 12.3 #l I I 15. Lal. 29840. ,f I I I I. PI. 14h69. RA. 16~18'"3' Decl. -23O I I' Rh. 14~17~29~Decl. +goo'. 1889.386 23.3 0.89 8 1 9 36 B and C. .389 j 25.4 8, 9 112 .392 I 26.3 8.3 , 8.8 12 1889:::; 1 136.8 I 0.21 1 8.5, 8.5 36 1 133.4 I 0.17 18.3, 8.3 ~ 36 - -___*391 -30.3- - - .-. __- . .403 135.8 ' 0.20 I 8.5, 8.5 , 36 1889.39 ' 26.3 0.90 I 8.1 , 9.2 I _. 1889.40 135.3 0.19 8.4, 8.4 I I 1 This star is a distant coinpanion to Q Ophiuchi, A and BC (= 2' 1835). 156143 distant, in the direction of 25300. 1889.397 189.8 6.34 5 , - 36 .~OO 189.4 6.39 5.5, - 36 .403 189.5 6.36 5.6,-- 36 @ 1116. B.A.C. 5600. - I ' 1889.40 189.6 I 6.36 I 5.4, - I RA. 16~36~51"Decl. --27O 14': 1889.389 , 358.6 I 1.62 7 , 12 I2 There seems to be but little if any change in thc X stars: -392 i 356.3 1-75 1 6.7, 12 I2 1832.08 18605 6106 2' .4oo 1 3.2 1 1.98 1 6.5, 11 -36-

1889.39 359.4 I 1.78 I 6.7 1 '1.7 ,@ 11 12. Lacaille 5983. R.4. 1qh 26"'3' Decl. -30' I 1'. 1889.392 8.2 . 2.52 6.3,12.5 12 RA .400 8.4 2.64 6 , 12 36 a403 7.9 2.37 6.2, 11 36 I 889.389 262.4 i 0.88 6.5, 6.7 I2 6.5, 10.5 12 0.72 6.5 6.6 I2 .430 ~ 5.2 2.19 a392 260.2 i , 9.6 2.51 -436 ~ 6, 10, 36 *397 268.9 1 0.59 6.3, 6.3 36 .444 6.1 2.40 7 , 10.8 12 .403- -36- - - _____ ~ 1889.41 , 3.6 J 2.44 6.3, 11.1 1889.39 4* 5.5 2956

-34'42'. 1889.383 27006 0?31 I 4 4.5 1889.465 1 21401 or51 I2 .468 214.8 0.63 .392 I 277.8 0.35 I 3 I 4 I2 0.66 .397 276.9 0.38 3.5 8 3.7 36 .473 1 203.9 I2 400 273.6 ,508 218.2 I2 1 0.37 I 3 I 3.5, 1 35 -- 0.54

In a large cluster. It is No. 24262 of the Argentim Catalogue. @ I I 24. 67 Ophiuchi. RA. 17~~4~38~ Decl. +zO 56'. A and B. 1889.383 .397 ,400 1889.39

1 889.39 I @ I 120. B.A.C. 5896. .400 . .~ RA. 17~21~14'Decl. -22'24'. I 889.40 1888.636 I 99.8 1 0.98 I 7 7 I 12 A and C (= South and Herschel 255). 9.392 98.4 0.91 i 7 7 12 1889.397 9,400 101.9 1 0.91 7 7 36 ,400 ' , 1 .. 1889.14 I 100.0 I 0.93 I 7 , 7 I 2889.40

Discovered with the I 2-inch. Very little change in the wide pair: 1878.57 12902 8?46 p In. @ 1121. DM. +12?3264. 1878.5.7 143.0 54.70 @ In. RA. 17~31~52~Decl. +12'37'. 1988.636 1 241.5 1 0.73 I - - ,8 I 125. 68 Ophiuchi. 9.392 240.5 I 0.73 RA. 17~55~~~40~Decl. +I' 19'. -___9.403-1 239.4 I 0.68 1889.383 18.0 I 0.83 1889.14 1 240.1 1 0.71 I 8.5, 9.0 1 ,389 This is 2"303 f. a Ophiuchi, and 2:s s. .392 -397 .400 14.8 0.93 p 1122. 1889.39 14.9 I 1.01 RA. 17~44~38~Decl. -28O27'. B and C. @ 1126. Yarn. 7599. ' RA. I 7h 56"54' Decl. -24' I 5'. 1889.389 171.2 1 1.24 10.5, II I 12 I .392 I 176.8 1.27 10.8, 11.3 12 A and 8. .397 i 177.7 1 1.42 ! JO 10.5 1 36- 1889.397 59.4 I 0.62 36 1889.39 175.2 1.31 10.4, 10.9 I I I I .400 51.1 I 0.67 36 A and BC (= Howe). ,403 54.4 I 0.63 36 36 I_ 1889.389 1 1889.40 I 55.6 I 0.63 I 8.7, 9.5 A and C (= H, 5009). _- - 1889.39 ~ 9.6 I 6.46 1 - 8.7 I ,400 -- The principal star is No. 24248 of the Argentine 4.13 Catalogue. The wide pair was discovered by Howe at Cincinnati : - 1880.44 8P7 6:54 Cinc. 2n. 1889.40 1 23.3 1 4.05 j - , 9.6 I In Messier 8. The wide pair unchanged: 1837.70 2008 .z"f H, In. Cinc. I n. 1880.58 19.9 3.86 1889.553 34002 I 0184 ! 7 , 9 36 .556 339.0 0.88 ! 6.8, 9.5 36 1r27. Groombridge 2500. ~ 10 . ...559 &:L----.0.89 6.7, ~-36 RA. I 7h 58"59= Decl. +44' 13'.

1889.523 ~ 14307 i 0167 I 8 , 10 i 12 .526 j 149.2 i 0.83 I 7.5 , 9 ' 12 B 1134. DM. +6301618. ,534 j 141.2 I 0.89 I 7.8, 10 36 ...... I KA. 2oh 19~29~Decl. +63"36'. 1889.53 i 144.7 I 0.80 I 7.8, 9.7 I 1889.476 j 81.7 I 4.24 i 5.5, 13 The magnitude in DM. is 6.5, and in Radcl. 7.2. 36 79.7 4.38 ~ 6 , 12 I 36 Discovered with the I 2 inch. 4.35 6 ~~ 1 80.9 I ~..___j , 13 i 36 .1889.48 1 80.8 1 4.32 I 5 8, 12.7 I 8 1128. B.A.C. 6285. R.4. 18~23~x2~Decl. -33"4'. This star is Riimker 8289, but is found only in these two star catalogues.") It is singular that a naked-eye star

1889.392 ~ 198.7 3.27 ! 6 , 12.5 1 12 should have been overlooked by so many meridian ob- .447 198.4 3.14 16.2, 11 I2 servers. The magnitude in the DM. is 5.9, and in Riimker 5.6. -_ .458 198.6 ~ 3.11 I 6 , II 12 ~ . .. *) Der Stern ist Nr. I 1312 des I-Iels. AG. Catalogs ; Grosse 5.5. 1889.42 198.6 I 3.17 6.1 , 11.5 ' I Kr. Discovered with the I 2 inch. p 1135. Lal. 39561. B I I 29. .Groombridge 2829. RA 20~25~10~Decl. +45" 20'.

RA. lQh 18~5is Decl. +sz" 9'. I 889.523 12 .526 12 1889.476 , 343.6 0.33 , 6.5, 6.5 .53I .482 ~ 343.5 j 0.39 : 6 I 6 36 36 345.7. - _-o.31~ ~ ~~ 6.5 . 6.5 ~ .499.. . . . 1889.48 i 344.3 I 0.34 I 6.3~6.3 The magnitude in DM. is 7.1. Discovered with the 12 inch.

I 130. 9 Vulpeculae. fl /3 I 136. Lal. 39698 RA. 19~29~18~Decl. +19" 23'. RA. zoh 28m6S Decl. +49" 8'. 1889.422 I 32.2 I 9.67 I 5.5, 13.5 0.33 ' 8 , 10 36 31.5 9.58 ! 5.5, 14 ' I 0.40 I 8 , 10 36 - - ..~ ~...... _~_ ' .-- -556 I 207.5 0.32 1 8.4, 9 36 1889.43 I 31.3 1 9.53 I 5.5 9 I4 1889.54 206.6 I 0.35 I 8.1 , 9.7 6 1131. B Cygni. Discovered with the I 2 inch. RA. 19~33~13~Decl. +49" 56'. fl 1137. B.A.C. 7278. R A 2oh ~2~36~Decl. +so" I 6'. 1889.436 36 .438 36 The proper motion of this star is oY24 in the .460 direction of 35204, so that in four years, if this motion is I 889.44 not common to both stars, the distance of the companion will be about 3!1, and the angle 58'. B 1138. Lal. 40856. 6 1132. w, 19h1204. R.4. 2oh ~8~34~Decl. +45p 22'. RA. 1 9h38"1 is Decl. +26"39'. 1889.436 I 187.1 I 0.29 .438 193.1 I 0.27 1889.553 .I 226.5 I 0.48 ! 8 , -9 ~ 36 ' .460 186.0 I 0.30 .556 : 226 5 0.53 ! 8.5, 8.5 36 I .559 229.0 0.46 8.5 , 8.7 I 36 1889.44 188.7 1 0.29 1 7.2, 8.5 I ~-1 1 ~~ i ~ 1889.56 227.3 I 0.49 I 8.3 , 8.7 I The following of two stars. In DM. 6". 59 2956 60

p 1139. Radcl. 5088. B I 144. Pegasi. R '4 2oh 58m39s Decl: +56O 36'. RA. ~2~37~~3~Decl. -1-29'36'. 1889.323 36 B and C. -383 36 *403 36 0133 I 10, 1.0 I 36 10, 10 36 1889.37 ~:~~ 1 10, 10 1 36 0.31 110.5, 10.5 i 36 /3 1x40. Radcl. 5183. 0.29 1110.1, 10.1 1 RA. zxh 14~1~Decl. +58"6'.

1889.526 9'"7 3 J - s6 ,534 33923390 I 90.43 1 -, - I 36 1889.58 I 276.5 I 3.89 I 6.7, 12.3 I

j3 1141. AOe.22270. RA. 2 I 2 2m7s Decl. + 5 7O 43'.

1889.58 [ 165.9 I 2.72 I 7.7, 13.2 1 j3 1145. AOe. 24690. /3 1142. DM. +56'?2579. RA. 2~~42~45~Decl. +57O55'. RA. 21~25~6~Decl. f56O33'. A and B. 1889.578 355.0 0.46 8.7, 8.7 1889.578 1 154.2 0.98 1 8 , 10.5 36 .589 I 352.5 I 0.41 I 8.8, 8.8 I 1 I iz .589 151.4 , 0.97 8 I 11.5 1 36 .~II1 153.5 I 1.14-__ 1 8.5, II I 36 1889.59 r153.0 1 1.03 8.2, 11.0;

1143. Pi. 21h248. A and C. RA. 21~35~14~Decl. +56"57'. 1889.578 I 179.4 1 21.98 - J 9.3 S6 .589 179.6 I 22.01 - , 9.8 36 A and €3. .6i1 1 179.5 21.98 I - , 9.5 1 36 1889.611 325.0 1.52 6 , 14 36 I I I 1889.59 I 179.5 I 21-99 I -- 9 9.5 I .616 , 322.0 1 1.59 1 -, 13.5 1 36

A and C (= 2' 2816). 36 1889.611 120.2 11.93 36 I -, 7.5 36 .613 120.0 11.76 - , 7.5 36 1 I 36 .. .616 121.2 1 11.88 1 -, 7 1 36 _.c__ 1889.61 I 120.4 I 11.86 I -, 7.3 I A and D (= B 2816). j3 1147. 2 Andromedae. RA. ~2~57~5~Decl. i-4~~7'.

1889.61 1 339.5 I 19-94 I - 2 7.3 I No change in the 2 stars: 1889.54 1 317.8 1 0.28 [ 5 , 8.7 I 1832.94 12001 11!'66 2 Suspected with the I 2 inch, and verified and measured '832.94 339.7 19.96 2 with the large telescope. 61 2956 62

p 1148. Groombridge 4070. fl 1152. Groombridge 4142. RA. ~3~2zrn1 zS Decl. +64" 58'. RA. ~3~42~17~Decl. +63"9'

1889.592 1 71Vo ~ 2Y06 1 6.7, 13 , 36 B and C.

,594 ! 76.4 ~ 2.20 ~ 7 I 13 1 36 oY69 .611 ! 74.3 2.13 1 7.5, 13 ! 36 0.66 ~ . -

~ 0.56 1889.60 73.9 I 2.13 I 7.1, 13 1 ___ 1889.60 0.64 The magnitude in I)M. is 6.5. 102.4 A and RC.

B I 149. DM. +57?2746. 1889.594 ~ 136.0 74.3' 497 136.8 74.32 RA. ~3~~4~1 Decl. +58" 1'. i .608 , 1.36.1 74.20 ~- I- 1889.578 311.0 0.50 i 9.5, 10 , 1 36 1889.60 I 136.3 74.28 ,586 1 305.4 I 0.53 ~ 9.3, 9.8 36

.589 311.0 ~ 0.52 9.5 3 9.7 36 ! ~ ~~~ P 7'53. 1889.58 I 309.1 0.52 9.4, 9.8 I I RA. ~3~46~45'Decl .+60" 2'. This star is in the field with 02'496 ; distance 231!'07, A and B. in the direction of 207%. 1889.673 321.2 I 0.40 9.5 9.6 ~ 36

,687 ~ 316.0 I 0.45 -1 - j 36 LO- ___.1 - ._ B 1150. AOe. 25672. .uay jzz.1 0.40 9.7, 10 j 36 R ~3~~4~46~ Decl. +64'24'. A92 314.9 0.48- 10 10.2 I 36 -4 .- ~ ~ - 1889.68 3'8.5 j 0.43 9.7 1 9.9 I 1889.594 46.2 0.63 , 8.5, 8.5 ~ 36 AB and C. .597 40.7 I 0.57 9 I 9.5 ' 36 .608 45.0 1 0.62 8.7 9 ' 36 1889.673 ~ ~. __~_ 339.8 , 13.80 1889.60 44.0 1 0.61 1 8.7, 9.0 1 ,687 339.1 13.61 .689 - .. .. 339.5 1 '3.74 P 1151. 1889.68 339.5 '3.72 RA. ~3~~5~6~ Decl. t 57" 43'. 08 511 and /3 1153. 1889.687 246.0 j 176.48 I - -- 1889.578 295.2 1 0.62 9.5 1 9.7 1 36 ,689 246.0 176.55 - , - ,586 1 291.7 i 0.72 9.7 1 9.7 1 I I 36 -- ,589 294.2 ____0.57 9.8 I 9.8 1889.69 246.0 j 176.51 1 - 1 I I ~~ F889.59 ! 293.7 1. 0.64 9.7 I 9.7 In the field and preceding 022 5 I I. The new pair is not in the Dh.K This is too small a star to be included in the DM. It is near 2' 3022. The following measures give its place p I 154. DM. +73?1068. from that pair : RA. ~3~55"' zS Decl. +74" 10'.

8 3022 and new pair. 1889.512 ~ 134.7 1.12 j 8 8.2 I2 .515 I 308.5 , 0.88 I 8 , 8 I 36 .518 8 __ -~ 307.0 j 0.93 1 , 8.2 1 36 1889.51 i 310.1 j 0.98 1 8 , 8.2 1

1889.58 1 189.7 ~ 116.88 1 - , - I Discovered with the I 2 inch.

Measures of Double Stars. P Cassiopeiae. p Cassiopeiae. The Struve 30 inch refractor was probably the RA. Oh 2m43s Decl. +58" 29'. instrument used. B 253. 1889.589 22:'61 i 2 14 i 36 i RA. ohqmgs Decl. +57"51'. ,592 1 :",:,"1 22.54 1 - , 13.5 I 36 1888.733 50P6 ~ , 8.5 I2 .s94 189.3 I 22.74 I - 1 '3.5 1 36 1 01'68 1889.59 I 189.2 I 22.63 i - 13.7 1 9.553 1 50.2 ~ 0.66 ~ 8 1 9.556 I 51.6 i 0.60 8.3, 8.3 36 This very minute companion was detected, I think, - 1 36 1889.28 50.8 0.65 8.31 8.3 by Mr. Alvan G. Clark. I do not know with what aperture 1 I I 1 it was first seen. I have a recollection of his mentioning The only prior measures are : some years ago that he had seen a faint companion to 1875.95 49?9 0~~42De 5". 2956 64

P 485. B 1. RA. 0~4~30~Decl; t58O6'. RA. 0~45~45'Decl. +55"58'. 1889.537 306?9 1 0:46 8.5 , 8.6 36 A and B. .553 307.8 i 0.42 8.4 I 8.5 36 I 1889.540 10 ! 8 , 36 .556 307.5 I ' 0.45 8.5 I 8.5 36 __ *556 8.2 , 9.5 36 1889.55 307.4 0.44 8.5 , 8.6, i I I 84.1 I 1.20 .5 70 .-- ~-8.5, 10 I 36 The only other measures are: 1 889.55 82.6 I I 45 8.2 , 9.8 I 1878.17 14805 ol'41 B 211. -4 and C. /3 486. Ceti 33. I 889.540 134.9 3.87 - , 8.7 I 36 RA. 0~8~19~Decl. -8°27'. i -5 56 134.3 , 3.82 - , 8.6 I 36

1888.914 I 5.3 I 3.09 I 5 , 11 j 36 .5 70 '33.5 I 3.77 - 8.7 . 36.- B 13. 1889.55 134.2 I 3.82 - t 8.7 I RA. oh 9m25s Decl. +76" 17'. A and D. 1889.323 1 91.5 1 0.76 36 1889.540 .392 1 89.8 I 0.87 I '6' : ::!I 12 .570 .397 I 91.9 i 0.75 ! 6 , 6 1889.55 .1889.41 I 91.7 I 0.81 I 6.2, 6.3 I 1889.540 I 332.8 I 15.83 ' -, 13 i 36 Binary system, in slow retrograde motion. cz Cassiopeiae. RA. oh 33m42s Decl. +55" 53'. A and B. 1889.594 273.1 17.61 36 .608 271.6 I 17.55 36 .6 I I 272.5 1 17.51 36 1889.60 272.4 1 1.7.56 A and C. 1889.594 105.7 i 39.65 36 .608 '05.5 I 39.40 36 1889.512 I ;;::; 2.05 - , I 1.5 \ 36 .526 2.22 .61 I 106.2 I 40.12 36 - , 11.5 I 36 __ 2.25 - 36 1889.60 106.5 I 39.72 A and Il (= H, 1993). 1889.594 I 280.0 I 63.27 I - , 9 36 280.1 62.96 I - , 9 36 2: I 280.4 1 63.36 I - I 9 ___36 1889.60 I 280.2 I 63.20 I - , 9 B 396. The nearest star, B, has not been seen before. The RA. 0~56~~13~Decl. +60° 26'. second companion, C, was added with the Chicago I 811, inch. My measures of this and the Herschel star are as follows : 1889.534 67.3 1.18 I 6 , 10 1 36 ~537 65.7 1-40 6 9.8 1878.11 108?7 40!07 P 211. AC 1 1 36 1878.11 279.9 62.38 fl zn. AD .553 66.1 1.27 I 6 , 10 I 36.- 1889.53 I 66.4 I 1.28 I 6 , 10 1 fl 492. B.A.C. 201. RA. oh 38"~8~Decl. +54" 34'. B 235. RA. 1~3~27~Decl. +50°22'. 1889.547 1 '50.9 1 2.09 I 5.51 11.5 1 36 .553 153.1 2.08 5.8, 11.5 36 A and B. .556 154.2 2.16 5.7, 11 I 36 0.76 I 7.5 , 7.6 I 12 1889.55 I 152.7 I 2.11 I 5.7, 11.3 I 7, 7 i36 The only earlier measure is the following: z::: I 7 , 7.3 I 36 1878.73 15206 1!'90 fl 2n. '889.53 I 86.I. 1 0.79 I 7v2, 7.3 I 65 295 7 66

This star, with distant companions, is 08 24. There j3 524. 20 Persei. appears to be some change in the close pair: RA. 2h46m9s Decl. +37O51'. 1875.65 7400 0148 De 6n. A and B. 1883.75 78.5 0.59 En 6n. 1888.681 I 8309

1889.594 ~ 291:3 P 258. The distance of this very difficult pair is decreasing RA. 1~5~29~Decl. +61"4'. The only other measures are the following :

1889.537 1 266:s ~ I:OO 1 6.5, 10 36 1878.66 15807 0:'34 P 3". .578 268.0 I 1.01 I 6.5, 9 36 1880.82 323.1 0.29 ji? 4n. .589 270.0 ' 0.97 6 , 10 36 - ~ 1 . .. _... 1881.67 334.9 0.28 ,9 rn. 1889.57 I 268.2 I 0.99 I 6.3, 9.7 2' 412. 7 Tauri. This may have slow motion in' angle anc distance : RA. .3h~7~20~ Decl. +24"4'. 1875.20 26004 0779 De 4n. A and B. 1881.63 264.4 0.89 i3 3".

305. Persei 58. RA. ih30"'52' Decl. +37" 13'. -- . _- - 1888.706 ' 205.2 ! 20.76 1 6.5, 10.8 I2 1889.64 1 36.4 1 0.30 ; 6 , 6 1 .7o9 205.9 20.79 7.5, 10.5 12 ~~~~ i I ~ I AB and C. 1888.71 j 205.5 I 20.77 I 7.0, 10.7 1889.589 j 59.7 j 22.15 ) 9 136 @ 513. 48 Cassiopeiae. .594 I 59.9 ; 22.20 ! , 9.5 36 .6g7 i 59.6 22.04 I - , 9.5 i 36 RA. 1~52~7'Decl. +70" 19'. ____-.-A___-.--2- 1889.62 59.7 ' 22.13 I - , 9.3 I

1889.512 i 302.6 0.72 ~ 5 ) 10 36 H, 4478. ,!? Hydrae. .515 305.3 . 0.66 i 5 , 8 36 RA. I 1~46~51~Decl. -33" 14'.

1889.427 349.2 I 1.57 -, ~ 12 , ,' - 'The measures made here last year gave ,430 1 350.0 1.52 1 - , - I2 .433 I 349.5 - I2 ~~ , - ~ 1 ~ I 1888.70 298?1 oP83 fl 4n. ~- 1889.43 j 349.6 1.53 : - , -I B 413. RA. 42"'1 Decl. - 27" 46':

1889.392 109.5 77.74 8 , 10 1 12

.397 ~ '09.5 j 77.58 1 1.5, 8.5 36 ~ 1 _~~. -~~ ~- 1889.39 i 109.5 i 77.66 ' 7.7 , 9.2 I Large star deep red. ,9 343. Centauri 219. RA. 13~45~8~Decl. -31~1'.

1889.351 I 129.2 1.98 6 , 8.5 12 OX 38. y Andromedae. .373 129.3 I 2.11 1 6.7, 7.2 I2 RA. 1~56~~32~Decl. +41"45'. .383 I 129.2 1.28 6 , 6.3 36 .386 1 131.2 1.41 6 ) 6.2 €3 and C. -~.-~1 ~ 1 36

1889.37 ~ 129.7 1.70 6.2) 7.1 1889.515 , 98.2 0.09 - , - 1 36 Now a very difficult pair. The measured distance is P 614. mot too large. The components are probably separating. RA. I 3h48m2s Decl. +- I oo44'. I 1889.383 270.4 ~ 0.43 ~ 8 , II 36

2 279. ,400 273.4 ~ 0.41 7.5, 11.5 36

RA. gh 28"'i Decl. +36" 47'. ~ sS 406 269.4 0.49 _- 8 , 11 I 36 1888.706 I 70.3 i 18.00 6.5, 11 12 1889.40 I 271.1 1 0.44 I 7.8, 11.2 I I2 This is 022 271 rej. The only other measures are 1878.38 26803 01'60 #l2n. Bd. 124. 5 29.5 7 68

Swift. A and E. RA. 13~57"40s Decl. +46" 55'. 1889.378 I 23300 I 27Y28 I -, 13 I 36 .383 232.5 I 27.04 - I '3 ' 36 __ .386 1 232.1 1 27.26 1 - , 12.5 1 36 ~ __.. 1869..38 [ 232.5 I 27.19 - , 12.8 1889.39 I 6.7 I 2.44 I 9 I 9 I Discovered by Dr. Lewis, Swift in the course of his The faint star, C, is now noted for the first time. work on nebulae. It has not been measured before. There is probably slow direct motion in the close pair. There are two other faint stars in the direction of 7407 fl 940. 52 Hydyae. and 56:s respectively, a little farther than E. RA. 14~21~9~Decl. -228O57'. 1889.378 . 279.3 i 4.05 I - , II , 36 B 447. Centauri 330.

.383 279.3 ~ 4.22 j -, 10.5 36 Rh. 14~47~18~Decl. -3~~49'. : I ! .386 , 277.5 4.53 i -, II I 6 ~~ ~ I 3.- A and B. 1889.38 i 2787 I 4.27 j -l 10.8)

The only prior measures are as follows: 1889.444 I 320.5 ~ 12.79 1 6 , 10 , 12

.447 I 321.0 13.04 ~ 6.5, 10.5 I 12 1879.42 276% 4:'oo 6 3". I ,465 320.4 i 13.20 I 7 , 11- I 12 . ... __ . ~-- - 414. Centauri 315. r8S9.45 I 320.6 ~ 13.01 I 6.5, 10.5 , Kh. I 4h34"42' Decl. - 30" 2 5'. A and C. I 889.42 7 342.9 1 1.10 5 I 7.3 1 IZ 1889.444 1 242.9 1 58.42 1 - 9.5 1 12 1.01 I -- I - 112 .430 I 347.0 i .447 j 243.5 58.41 . -8 10 12 .436 I 347.0 1 o.9r , 6.5 I 8.5 I 36 , 10 i 12 ___- 14-65 .i 242.9 .. I 58.5.5. i. - .. .. -.

1889.43 I 345.6 I 1.01 6.51 7.9 I 1889.45 243.1 ~ 58.46 I -, 9.8 I This is the first measure of this pair. No other measures.

Hn 20. 5 Librae. RA. I 4h39% xS Decl. - r 4" 5 7'. p 239. 59 Hydrae. RA. 14~5 1'"23~ Decl. -27O 10'. 1889.378 247.4 ! 2.53 ' 6.5, II ; 36

.383 ~ 252.1 I 2.90 I 6 , 11.5 36 1889.430 309.0 0.78 6 , 6.1 12 .386 248.2 ' 2.93 6 1.1.5 36 I __ ___. __ , ~. 3'5.2 5.5 5.5 1.889.38 249.2 2.79 6.2, 11.3 310.1 ~ 6., 6.2 1 I I i ::::1 . ... ::::1 __ -. . - - . .1 . . . :z. .- 1889.44 31 1.4 0.86 j 5.8 , 5.9 The only earlier measures are: I 1861.43 24908 2Y69 fl 3n. Very little, if any, change, although some of the measures are discordant. 6 106. p Librae. 2 1926. RA. 1.cl~42~45~Decl., -I 3" 39'. RA. I 5h 10~23~Decl. +38O45'. h and B. 1889.288 I 258.0 1.29 1 7 9 I 36 256.8 0.96 1 1889.378 1 342.7 I 1.53 i 5 6 36 j 9.5 j 12 .383 340.0 ' r.6j ! - - [ 36 :i,"o1 258.2 1.05 [ 9 12 ____.386 I 339.2 i 1.64 j - - I 36 1889.35 I 257.7 I 1.10 I 7.7 9.2 I -- I 1889;38 j 340.6 j 1.61 I -- I.

-4 and C. 6 121. B.A.C. 5163. 1889.383 I 283.1 18.25 I - RA. 15~32~20~Decl. -27" 15'. .386 I 284.3 18.41 1 -- ~ I 1889.447 276.9 1 1.48 I 7.5 1889.38 . 283.7 I 18.33 ! - , 14.5 I .468 1 276.7 1.49 I 8.7 278.8 1 1.37 I A and D. . .5O5 . - 1889.378 i 185.8 I 25.39 1 - , 13.5 36 1889.47 ~ 277.5 1 1.45 1 8.2 , 8.2 1 .383 i 185.4 26.29 ; - , 13.5 I 36 Probably unchanged :

.386 ~ 185.2 26.21 j -, 14 (. 36 I __.~ 1889.38 ; 185.5 I 25.96 - 13.9 1876.90 27806 1Y67 Cinc. 213. 69 295 i 70

,!? ,!? 947. Scorpii. B 815. KA. 15~58~28~Decl. -19~29'. RA. 16~23~16~Decl. +43O I 1'.

1889.383 ~ 91?6 oY88 ' -- , II j 36 1889.425 i 34304 I 7Y63 I 8.5, 10 36 12 ~ 11.8 .397 I 95.5 1.13 - , II 36 .430 I 342 4 7.68 8.5, I .42z 94.9 0.89 - , 11 36 .430 I 89.9 1 0.86 -- , 10.5 i I2 .438 i 97.4 j 0.94 . - , 10.5 : 36 -. . ..- . - .- __ . ..~~ ~~~~ . . ... The distance is increasing, probably from proper 1889.41 ~ 93.9 I 0.94 - ) 10.8 j motion. 1881.30 34804 6:42 P 3n. This will certainly prove to be a physical pair, but 1886.40 344.5 7.28 En 6n. the change thus far, if any, is very slow : 2 2 118. 20 Draconis. 1880.06 8804 oV91 /3 6n. R.4. 16~55~49~Decl. +65O 13'. 1881.50 92.7 0.96 fi 3".

1889.403 140.8 ~ o.Ioest.~ -, - ' 36 P 811. -463 ~ '136.8 j 0.10 i 5 5) 6 ! 36 ,499 I 144.4 j 0.14 - , - . RA. 16~0~4~Ilecl. +22O30'. -- I I 36 1889.45 140 7 0.1I I -- , - ! I

1889.473 220.2 3.72 j 8 , 11 ~ 36 The measured distance is certainly not too small. .479 ' 221.5 3.59 7.5, 10.5 ~ 36 This pair has been regarded as single for many years. .534 ~ 220.3 I 3.78 ~ 8 , 11 .-. . .. - - - .? 6.- The last preceding measure is the following : 1889.49 ~ 220.7 I 3.70 I 7.8, 10.8 1880.82 z11?3 0:)2 @ 4n. The only other measures are: 823. 1881.31 221% 3149 /5' 3n. RA. 17~0~29~Decl. +0°49'.

1889.468 j 0.9 ~ 1.05 I 9 , 10 1 12 P 120. Y Scorpii. 473 . 359.7 I 1.25 I 8.5, 9 I 36 RA. 16~5~1~Decl. -19~9'. .508 ,, 358.8 I 1.22 I 8.5, 9.5 i 12

A and B. 1889.48 ' 359.8 I I.'7 1 8.7 I 9 5 ~ The only earlier measures are : 1889.430 I 1.4 , 0.83 - ) - I I? - 438 I 1.9 1 0.81 I 36 1881.39 353?9 1Yo4 [j 4n. .465 02 , 0.75 - - -. i .. . . -. I I? I I: P 125. 1889.44 1.2 I 0.80 -, - KA. 17~4~43~Decl. -26O53'.

Sh. 228. Q Ophiuchi. 1889.447 i 63.6 i 1.38 i 7.6, 9 I 12

' 1.60 1 8 10 12 RA. 16~18~23~ Decl. --23O 10'. 56.4 , I

-. .- .61.9... 1.47.. j 8. .. ,. ~ II .. 12. ~~

-4 and B. 1889.47 I 61.3 I 1.48 , 7.9,. 10 ~

1889.386 I 354.1 I 3.34 I - I - , 36 p 282. .389 , 355.4 I 3.46 I 5.5 t 5.8 : 12 RA. 17~8~29~Decl. -14'27'. .392 I 355.5 3.43 j 5.5, 5.7 . ! . 12.- 1889.406 152.4 4.25 ~ 6 , II ~ 36 1889.39 j 355.0 I 3.41 ' 5.5 I 5.8 I ,422 ! IjZ.0 4.33 . 6.5, II ~ 36 ,430' 151.2 i 4.35 16.5, 12 1 IZ A and C. . - - .- -.- -___ 1889.42 : 151.9 1 4.31 6.3) 11.3 1889.389 359.7 ' 150.98 I - , 8 IJ~ I .39z j 0.0 j151.41 I -, 8 I 12 No sensible change in this pair. . _. 188939 i"359.8 151.15 1 -, 8 I P 957. A and D. RA. 17~8~57~Decl. -IO~IO'.

1889.386 i 253.3 I156.05 I - 36 1889.473 1 201.9 1 045 8 ) 8.2 ' 36 .51z I 202.8 I 0.46 .389 252.8 156.39 I 1;8 i 12 I I 8.3, 8.5 36 .515 , 200.3 ~ 8.3, ' 36 -, 12 0.51 I 8.5 .392 252.8 1156.84 I 8 ..... ~- . - ~ ._ ~ , .__~_____ I . - 201.7 0.47 1889.39 : 253.0 . 156.43 -, 8 I 1889.50 I I I 8.2, 8.4 The distant star, D, is a close pair, and will be The only other measures are: found in the list of new pairs. I 1880.16 2306 0158 P 3n 7.9 7.9. 5.4 7.1 295 7 72

p 416. B.A.C. 5825. RX. 17~10~47~Decl. -34'51'. 21104 201'16 I 8.5, 8.8 12 A and B. 211.3 20.09 8.5, 8.8 36 212.3 19.75 1 8.5, 8.8 36 1888.717 147;s 11'88 6 , 7.5 I2 1 1 1 211.3 20.08 1 8.3, 8.7 I2 __--______36 9.392 '35 0 1-39 I 6 1 6.5 6.2, 12 , 9.447 1 132.0 1.50 1 8 9.465 135.3 1-17 7 , 8 I2 The change is probably due to proper motion. 1889.25 I 137.4 I 1-48 I 6.3, 7.5 8 2272. 70 Ophiuchi. AB and C (= H,4935). RA. I 7h 59"23' Decl. +a0 33'. 1889.392 128.4 I 30.80 +- , I I 12 12 1889.30 Both stars single with. 36 inch. .447 I 128.1 1 30.75 I -1 10 1 I2 - ,465 129.4 -.31.55 1 -, 10.5 08 342. 72 Ophiuchi. 1889.43 1 128.6 ! 31.03 1 - , 10.5 RX. I 8h 1~42~Decl. +9' 33'. Swift. 1889.30. Large star single with 36inch, and no RA. 17~x5~Decl. -1-53'47'. near companion. 1889.433 I 131.0 I 0.63 8.6, 8.7 36 A. C. 15. 99 Herculis. 436 I 133.3 0.50 1 9 I 9.1 36 .438 I '31.7 0.59 9 I 9 _.36. RA. 18~2~28~Decl. +30°33'.

1889.43 ~ 8.9, 9.0 132.0 I 0.57 I 1889.502 ! 281.2 1 0.65 , 6 , 11.5 , 36 Discovered by Dr. Lewis Swift. No other measures. I was unable to see the smaller component last year. B 962. 26 Draconis. [t is now very difficult, and although seen for an instant m two or three other nights, I could not get a satisfactory RA. I 7h 33m44S Decl. +61' 58'. measure. The following are all the measures : 1859.63 34701 11'71 Da zn. 9 11 ; 36 1878.46 24.4 0.99 fi 3n. 1880.18 29.9 0.91 I? 3n. 1881.43 29.4 0.51 6 ~n. 1889.42 130.1 I 0.95 I -, 11 1 Evidently a binary in rapid movement. For some Evidently a binary. The large proper motion (0!'582 -eason it is extraordinarily difficult for the assigned magni- in 15202) is common to both stars. The distance is de- :udes and distance. creasing, and it is now more difficult than formerly. The following are all the nieasures : B 759. RA. I 8h 3'"54' Decl. -390 32'. 1879.97 151% 11'37 4n. 1881.53 148.1 1.31 3". A and B. 1889.389 121.7 ' 1.80 9 , 9.3 12 . A. C. 7. p Herciilis. , 1 .392 1 120.7 i 1.94 I 9 , 9.3 I I2 RA. 17~41~47~Decl. +27"48'. I .430 j 121.7 I 1.68 8.6, 8.7 1 12 B and C. 1889.40 I 121.4 I 1.8~I 8.9, 9.1 1 1889.502 359.3 I 0.58 10, 10.2 1 36 A and C (= H, 5028). .512 358.2 0.54 9.8, I0 I 36 I I I 1889.389 I 146.4 14.99 I - , 9:2 I 12 .5'5 I 355.5 I 36 .39z j 147.9 15.05 : - , 9.2 12 .518 I. 357.7 I .430 I 147.6 14.71 i -, 8.5 I2 -- -- ~~ ~ I 1889.51 1 357.9 1 0.55 j 10, 10.1 i i 1889.40 1 147.3 ~ 14.92 i - 1 9.0 ' Mr. A. C. Leuschner has computed the orbit of this pair, using the foregoing measures, and finds a period of P 760. 7 Sagittarii. 45.24 years. RA. 18~9~31'Decl. -36'48'. P 825. RA. I 7h58m20S Decl. +25" 22'. A and B. .4 and B. 1889.389 106.1 I 3.89 I2 .392 110.8 1 3.32 I2 1889.473 1 195.1 11.35 . - I 11 36 ,479 ' 194.4 11.00 - I 1.5 36 .43O 1 104.5 1 3.42 I2 .438 106.8 ' 3.40 I2 .482 1 194.2 I 11.25 I -: 11.5 1 36 1889.41 107.0 3.51 1889.47 1 194.6 11.20 ! -, I 1.3 I I I 73 295 7 74

I 889.389 - , I0 j 12 .438 - , I0 I I2 1889.4 I

RA. 18~3om2 is Decl. +I IO 37'.

1889.21 252.8 1 0.43 I 8.2, 8.2 I Probably a binary, but the motion is very slow.

1889.389 252.4 1.06 ~ .-, - I2 5 Lyrae. .392 i 254.2 1 0.70 i 3.5, 3.6 I2 RA. i8'! 40~38~Decl. +37O 29'. -397 258.9 j 0.79 - ' - 36 A and B.

1889.425 ' 48.6 i -2 '5.5. 36 -433 iI 48.8 I z;:i:1 ~ -, 16 36 ~ A..I ._

1889.43 48.7. j 26.93 I -, 15.7 I A and C (= 2 38 App.1). 1889.425 ; 149.5 I 43.77 .433 I 149.2 I 43.70 I-:- -. __I'36 36 _.

1889.43 ~ 149.3 j 43.73 1 -, - ~ 'The very faint star, B, has not been seen before. It is much more difficult than the companion found with the 181/~inch, 43!'37 from the principal star, in the direction Of 2 74.4. 22 2400. RA. 18~43~32~Decl. +16"7'. A and B. 1889.460 I 190.8 I 1.65 8 , 11.2 36 .471 j 188.7 ! 1.64 8 , 11.1 36 .473 I 187.4 1.60 8.5, 11 36 ,482 1 189.2 1.55 8.5, 11.1 36 I ~~ '889.47 ! 189.0- - -I.sI- 8.2, 11.1 A and C (= 2' 2500). 1889.460 193.0 I 2.38 1 -, 11 1 36 .47I I 190.4 2.67 I -, I1 36 .473 i 192.3 I 2.54 Ii - 9q36 .482 I 191.0 1 2.56 I -, 11 I 36 ~ - __ . -. ~-

1889.47 ~ 191.7 1 2.54 ~ -, 11 j B and C. 1889.473 17.5 I 0.84 i -, - I 36 ,482 j 17.6 0.78 , - , - i 36 . - .~ ~... . . 1889.48 ' 17.5 I 0.81 I - , - I The small star, B, was discovered by Perrotin, and independently by Young with the Princeton 23inch. The change in the position of the Struve companion is due to the proper motion of. A. B and C appear to be relatively fixed. As they are of substantially the same magnitude, it is singular that Struve and later observers should have failed to see the other companion. As a matter of fact, the latter was measured by 08 in 1872 for the old coni- panion. 75 295 7 76

P 761. A and D (= H, 1455).

RA 19~31~45~Decl. -39O42'. 1889.512 16$2 491'81 ~ -- , I I I 36 169.0 49.84 I I 36.- - 1889.392 19706 2142 ' 8 , 10 12 _..__ .515 I I - 10.5 1889.51 169.1 i 49.82 1 -, 10.7 I .430 199.6 ' 2.52 ~ 7.5, 10.5 12 197-3 2.40 I 7.5, 10 12 .438 _- --I .~-~__ The only prior measure of the nearer star is: 1889.42 198.2 I 2.45 I 7.7, 10.2 1879.89 20906 71'07 p 5".

The following are all the measures: Ho. I 2 I. 1879.68 19704 - 3". RA. 2oh 7m25S Decl. +34O 7'. 1886.71 198.7 2:'~s Rus. In. A and B. 02' 380. x Aquilae. RA. 19~36~~55~Decl. +iio33'.

1889.592. I have never been able to see with any ~ .~ .- .- . telescope the third star noted by some 1889.43 I 17.5 22.42 I 7.3, 10.8 1 of the earlier observers. The g6inch A and C. fails to show any other than the well 1889.425 ' 14.0 ! 41.54 j - , 11.5 ; 36 known components :436..: I 15.1__- i 41.58.i - , 12.5 i 36 - @ 658. B.A.C. 6762. 1889.43 I 14.5 I 41.56 I -. 12 I R.4. 19h39mISDecl. +26O50'. Discovered by Hough. This star was measured in :onsequence of a note by Hakhuyzen (Bulletin Int. Phot. 1889.553 I 301.8 0.54 I 6.5, I0 1 36 Eongress 111.2 I 8) as follows : .556 I 298.7 0.50 j 6.8, 9.5 36 1 PLe changement dans la position des deux compo- .559 I 299.3-i 0.45 __6.8, 9.5 I 36 ______- jantes de l'ktoile double DM. +3403916' (position ponr 1889.56 299 9 0.50 I 6.7, 9.7 I I I 875.0 a = 2oh8"8', d = +34O 6' 2'7, est fort intkressant ; The only previous measure is : ie n'ai pu en trouver d'autres 0bservations.a 1878.53 295?2 0157 fi In. There is certainly no change in €3, as Ho. found: 1884.71 1708 21143 Ho. 2n. A. C. 9. Sagittae. 5 The distant star is only roughly given: 40°, 42". RA. 19h43m39s Decl. +18"51'. a2 Capricorni. 8.4 1 0.12 I 4 , 5 RA. 2oh I 1~24~Decl. - I zo 5 5'. B and C (A. G. Clark). 1889.57 5.0 , 0.12 1 -, - i The following are all the other measures: I 889.463 238.0 I 1.08 I 11.5, 11.7 .47' 239.7 1.26 , 11.5, 11.6 316?9 - De 3". , 1875.8 .502 1.22 I I1 , 11.1 1878.11 151.6 0129 6 5n 239.2I - .~ 1889.48 239.0 I 1.19 iII.3, 11.5 1880.20 153.3 0.31 p 3". 1883.41 176.6 0.17 En 8n. A and B (= H2608). It is much closer and more difficult now than for- 1889.463 7.86 \ - , - merly. Perhaps 18oO should be added to my last angles . .471 to make them correspond to the other measures. .502 148.5 1 7.70 I .- , - 1889.48 146.8 I 7.75 ' - , - j3 980. 7 Cygni. The change, if any, in the close pair is very slow. RA. 19~5 1~48" Decl. +34"46'. A and B. P 431, RA. 2oh I 5m25s Decl. +35O 53:

I 889.5 2 3 41.9 1 0.65 1 8.5, 8.5 I 12 .526 33.3 1 0.70 I 8.5, 8.5 I Iz .531 39.7 j 0.68 I 8.6, 8.6 36 1889.51 j 210.4 7.21 I -, 13 .534 38.1 ! 0.60 8.7, 8.7 36 I _~ ~ -. A and C (= H, 1455). 1889.53 38.2 I 0.66 I 8.6 , 8.6 I 1889.512 326.1 46.17 I -, 11.2 Probably unchanged. The following are all the measures : -515 I 326.3 I 45.98 - t 10.7 1877.33 22008 oY56 De 5n. 1889.51 I 326.2 1 46.08 1 - , I1 1884.84 53.1 0.42 En 7n. 77 29.57 78

p 763, x2 Sagittarii. C and D.

RA. 2oh 15~45~Decl. -4~~48'. 1888.885 ' 24107 ~ - i' 10, - 9.422 I 65.0 1Y28 10, I1 I I2 1889.430 20908 ' 1149 I . 6 , 8.5 : 12 I 36 66.7 ~ 1.26 10.5, 11.5 36 .460 I 210.9 I 1.38 6 , 9 12 9.433 66.5 1.27 10 11 ,468 ' ' 6 , 10 12 9.436 , 36 213.1 I 1.31 -. ... - ......

~ ~ 1.27 10.2, 11.2 .523 i 210.9 ~ 1.15 6 , 8 12 1859.29 I 65.0 - ...... 1889.47 ' 21 1.2 I 1.33 1 6 , 8.9 I AB and C.

p 151. B Delphini. 1888.885 I 220.1 ~ 27.13 i - , - ! 12 ' 9.422 ~ 219.7 ~ 27.46 - , - R.\. 20~31~55'Decl. +14O11'. - i 36 9.433 , 219.2 27.64 i - , I 36 h and B. 9.436 ' 218.8 ! 27.59 I - - 36 .... ~~ .- ...... - .. _-

1889.29 ' 219.4 27.45 - - ~ 1889.422 j 3091 I 0.32 I -, -- ~ 36 I I , .so2 I 315.8 I 0.32 -- , -- 36 The duplicity of C was suspected at the time of .5I5 i 315.7 i 0.24 , -, - 36 finding the other pair: .520 ! 314.6 ! 0.35 I -, - I 36 I 1881.63 19104 oY62 B 3". .537 3'5.9. I ''3' - J . -~~ .:. -34- ~ ~~ ,I 1889.50 314.2 I 0.31 - , - B '59. fl 675. 51 Cygni. RA. 2 6m21' Decl. +47O I 2'. RA. 2oh 38"'31' Decl. +49O54'. A and B.

1889.438 , 104.2 ' 3.18 ~ 5 , 13.5 ' 36 1889.526 ~ 317.3 : 1.19 7 , 10 1 I2 ,460 I 97.5 j 2.82 5 , 12.5 I 36 ' : ,531 315.2 1.42 7.31. 9 I 36

.463 102.7 , 2.98 . 5 , 13.5 ~ 36 - .. I ...... ~-_.- -534 317,s j 1.22 I 7 , 10 36 I . . ~~ .. 1889.45 i 101.5 I 2.99 I 5 , 13.2 I 1889.53 31.6.7 I 1.28 1 7.1, 9.7 I The only other measures are : A and C (= 02' .4pp. 21 5). 1878.24 101?5 2Y78 3". 1889.526 . 189.3 1134.34 i - , 7.5 , 12 .534 . 189.6 j 133.99 I - , 7.2 i 36 2' 2758. 61 Cygni. - RA. 21~1~14~Decl. +38O8'. ,1889.53 I 189.4 : 134.16 - i 7.3 There is a faint star near AB, about 14" distant, in 1889.463 Both stars single in the 36inch with the direction of 147". The principal stars seem to be .so2 J powers up to 1000. relatively fixed : 1876.69 318P4 1133 De 7x1. AB B 679. 1875.72 189.6 134.14 De 4n. AC RA. 2 1~25~Decl. +43O I 2'.

1889.436 67.2 ~ 0.58 , 10 , KO ' 36 02' 535. 6 Equulei. .438 67.1 ' 0.47 10 , 10 : 36 RX. 21~8~~38~Decl. +g031'.

10 10 ~ .463_;--.62.4 , 0.51 i , .... 36 - ...... __~-. 1S89.515. Slight elongation with the 36inch in the 1889.45 i 65.6 I 0.52 10 , 10 direction of 34302. Distance not more One of the smallest close pairs known. It is too than O!'IO. The measures last year gave: faint to be included in the DM. I expected to find some motion, but the measures do not show it. 1888.69 18gP9 0125 8 4n. 1878.10 68Pr 0138 p 2n. -Alvan G. Clark. z Cygni. R,4. 21~romoS Decl. +37O32'. B 836. 1889.438 j 34.4 I 0.63 { - , 9.5 36 RA. 21~2~27'Decl. +47O54'. I .so2 ' 31.0 : 0.58 - , 10 j 36 A and B. .so9 I 31.3 a42 i - , 10 .~ 36 .515 I 36.5 I 0.38 I - , 10 ; .36 1888.885 190.2 i 0.70 9.5, 9.5 12 ...... -. 1889.49 36.5 1 0.50 - , 10 9.422 194.2 . 0.66 , 9 9 36 I I 9.433 I 190.1 j a60 I 9 , 9 36 I was unable to see this star double last year, and 9.436 191.3 : 0.58 9 9 j 36 _ ...... -__, ...... -- , .- -- it is now very difficult. The angular motion since the last 1889.29 191.4 1 0.63 I 9.1 , 9.1 f measure in 1880 is about rooo. 79 295 7 80

@ 766. d Microscopii. 382. B.A.C. 7983. RA. 21~16~49~Decl. --41"31'. RA. 22h48m~8sDecl. +44" 7'. 1889.430 I 307?1 I 1!'06 I 5 , 7 I I2 A and B. 1889.523 j3 989.. sc Pegasi. .5 2 6 RA. 21~39~12~Decl. +25"6'. ~_____-534 __ - ___. . 36 A and B. 1889.53 217.6 I 0.98 I 7.3, 8.8 I 1889.509 269.1 ' 0.15 A and C (= H, 1828). I 2 256.1 0.16 .5 I - *5'5 265.6 \ 0.13 1889.526 i 353.9 I 26.99 .526 258.3 j 0.12 - -534 I 353.6 (-26.86 ! - I 889.5 I 262.3 1 0.14 1889.53 353.7 I 26.92 ' - 1 10 I This pair, which has always been close and difficult, Some evidence of motion in the close pair: seems to be closing up. The following are all the measures : 1876.39 205?7 11'07 De 7n. 1880.68 137?9 01'27 j3 4n. 1881.70 210.1 1.09 /3 3n. 1888.78 274.7 0.23 /3 3n. Barnard. 2 Piscium. The first angle may possibly require a correction of RA. 22h53m~8sDecl. +oo 19'. I soo.

@ 690. ,u Cephei. 1889.553 1 96.0 j 6 1 14 I 36 RA. 21~39~~50'Decl. +58"14'. .556 j 91.8 I $! [ 6 , 13.5 j 36

1889.520 I 259.5 I '9.56 I 6 9 '3 36 I 19.51 I -1 13 I 36 19.66 13.5 36 Discovered by Mr. E. E. Barnard with the 12 inch of I i - , -. 1889.52 j 259.6 1 19.58 1 6 , 13.2 this Observatory. 8 718. 64 Pegasi. Herschel's variable agarnet stare. The only other R.4. 23h 16~3'Decl. +31'9'. measures are : 1878.87 259?4 19716 @ 3n. 1889.473 1 85.9 1 0.70 \ 5.5, 9 12 .5i5 ~ 87.3 0.66 1 6 , 8.5 i 36 @ 290. 34 Pegasi. .523 1 85.3 1 0.70 1 6 , 9 12 - ~ RA. 22h 20~30~Decl. +3'47'. 1889.50 I 86.2 I 0.69 I 5.8, 8.8 I

1889.589 2 18.6 Probably not much change. .633 02 496. Pi. 23h100. -673 __-- I 889.63 218.7 I 2.71 I 5.8, 11.7 I RA. 23h 24'99' Decl. +57" 53'. Apparently unchanged : A and B.

1878.49 21809 2:62 5n. I 889.5 78 343.5 1.22 II 36 I j 6 , *583 339.2 I 1.39 ! - , - 12 343.6 1.22 I 6 , 12 I 36 @ 291. *589 I RA. 22h21m39s Decl. 43'55'. 1889.58 342.1 I 1.28 1 6 , 11.5 1889.589 C and D. J533

1889.5 78 226.3 I ~ *673 1.55 I 7.5, 8.5 36 224.9 I 1.61 I -, - I I2 1889.63 a583 221.0 .586 - I 1.38 1 7.5, 8.7 ~ 36 The following are all the measures: 1889.58 224.1 1 1.51 I 7.5, 8.6 I 01'32 De 4n. 1875.82 157% A and C. 1878.64 160.0 0.42 /3 ~n. 1880.08 165.5 0.50 p 211. 1889.583 1 268.9 I -75.56 ..i 12 .586 I 269.0 1 75.50 ! 36 B 2912. 37 Pegasi. 1889.59 1 269.0 1 75.53 1 -, - I RA. 2 ah ~3~54~Decl: +3" 49'. A small star 231!'07 from A, in the direction of 207?6, 1889.589. Single with 36inch. is a close double. It is given in the list of new pairs. 81 295 7 82

2 3022. P 996. RA. ~3~25"'7' Decl. +57"45'. RA. 23h46"'31S Decl. + 74O 5 3'. 1889.578 I 22604 I 20:128 I 8.5, 8.8 36 1889.51 2 6.8, 73 12 .583 226.2 20.31 8.8, 9.5 I2 .5'5 6, 13136 .518 *586-- 1 226.2 i 20.49 I 8.5, 36 6.5 2 11.5 I 36 1889.58 I 226.3 1 20.36 1 8.6, 9.1 1889.51 68.0 I 5.77 6.4, 12.5 ! Without change : The only other measures are: 1832.15 22607 20!49 8. 1880.64 64?7 51'52 fi 4n. 1888.74 67.1 5.43 P 3n. A tenth magnitude star I I 6!88 from h in the direction The small star evidently has the same proper motion of 18907 is a close double, and be found in the list will IS the prin'cipal component, Radcl. 6 203. This, according of new pairs. o Argelander, is 01'298 in the direction of 8803. @ 720. 72 Pegasi. RA. ~3~28m~S Tlecl. +30° 40'. 8 730. 27 Piscium. RA. 23h 5 2'"3 2' Decl. - 4' 13'. - 1889.473 1 145.6 i 0.34 I - , I2 ,515 ! 144.9 I 6, 6 Ii36 1889.553 ! 267.8 I 1.52 4.5 , 11 36 .556 1 266.7 I 1.59 5 5, 12.5 .526 1 147.4 I 0":;: I 6 , 6 1 36 1 36 1889.50 \ 146.0 1 0.38 1 6. , 6 _____.594 I __267.6 1 1.39 5 9 10.5 _-36 1889.57 267.4 I 1.50 I 5 , 11.3 There is evidently some change in this pair. The For comparison we have : following are all the measures: 1878.49 265?2 11'49 p 5". 1878.74 12707 oY40 0 7n. 1878.74 128.7 0.37 De in. p 7.33. 85 Pegasi. 1880.01 311.0 0.41 p 3n. Rh. 23h 5 5"s 2' Decl. + 26" 2 7'. 1883.40 147.6 0.25 En 7n.

A. G. C. 14. 78 Pegasi. I 889.5 I 5 130.7 0.98 1 -, I1 36 132.2 RA. ~3~37m57'Decl. +28'42'. ,523 0.97 I_- , I I 36 .594 36 1889.468 196.0 1.45 5.5, 10 12 .633 36 I2 '95.8 1.38 5 I 9 .687 .473 ___- 36 .so9 199.1 '1.50 6 , 16 1 1 36 I 889.5 9 1889.48 I 197.0 1.44 I 5.5, 9.7 There may be a slight advance in the angle 1889.473 12 1876.59 19200 1:'45 De 4n. -509 36 1878.77 191.8 1.61 @ 2n. .515 36 .523 --36 Barnard. W, 23h803. 1889.50 358.7 1 22.66 1 - , --I RA. 23h 40~53' Ilecl. +4O 35'. ivir. J. ivi. scnaeoerie, wno computed the orblt ot the close pair (Gould's Journal, 185), using all the measures 1889.553 I 166.2 I 0.49 8.7 8 8.7 36 .556 1 166.5 1 0.59 1 8.6 , 8.6 36 down to and including those made here last year, gives .589 166.0 0.53 8.5, 8.5 36 the calculated position angle for 1889.59 as 13208, and the distance, 11'03. 1889.57 166.2 1 0.54 1 8.6, 8.6 2' 3057. Discovered with the I 2 inch by Mr. E. E. Barnard. RA. 23h 58"43= Decl. +57'52'. 1889.553 120.0 3.62 6.6, 8.8 I 36 B 995. .578 I 120.0 I 3.70 I 7 , 9.5 36 KA. ~3~41~35'Decl. +46O 10'. ,589 1 120e2I 3.65 1 6*7 I 9 1 36 1889.468 1 244.6 I 0.91 6 , 10 I2 1889.57 i 120.1 I 3.66 I 6.8, 9.1 I ,473 I 242.2 0.99 I 6 9.5 I2 2 3062. a509 I 243.4 0.89 I 6.5, II __.- i 36 23h 59"'57' Decl. f57"46'. 1889.48 1 243.4 0.93 1 6.2, 10.2 322.1 I .1.33 6.5 > 7.5 1 36 The only other measures are: 321.8 1.46 1 6.5 I 7-5 36 1879.61 24200 0!68 Cinc. In 3'9.5 I '.55 6.6, 7.5 1 12 321.1 j 1.45 1880.01 245.4 0.88 @ 2n 6.5 I 7.5 I Bd. 124. 6a 83 295 7 84

New Nebulae. Several new nebulae have been incidentally noted in the course of the foregoing observations, but they are nearly all in the field with bright stars, or double stars. The lowest power used in the double star measures has a field of only 5' in diameter, so that faint nebulae mould not be noticed unless quite near the star under examination. The places of some of these have been accurately determined by Mr. Barnard with the 12inch equatorial. I have measured two with the 36inch as follows:

(D Piscium and nebula. Lal. 39690 and nebula. KA. ~3~53m9s Ilecl. +6" I 2'. KA. zoh ~9~37~Decl. -oo 25'. 1889.630 1 278?6 1641'51 -, - 36 1889.633 1 25701 841'50 -, - 1 36 I I ,633 , .278.0 ~ ~64.09I - - 84.20 ! -, - . ------.I_ - -36 .- - .6.- 5 6.9' __ ..- - - __ .-3 6

1889.63 I 278.3 ~ 164.30 I -, - ! 1889.6j .; 257.0 i 84.35 I - , - I 130th are faint objects with.the large telescope. The places given are those of the respective stars.

Tick Observatory 1889 Aug. 20. . - -. .- -_- -- - Elemente und Ephemeriden fur die Wiederkehr des. Brorsen'schen Cometen. (Fortsetzung zu A. N. 2933 und 2940.)

Iler Comet ist wider Erwarten bis jetzt noch nicht 1 achtiingen der beiden letzten Erscheinungen 1873 und 1879 aufgefunden worden. I)a er in den nachsten Tagen seine I neu ausgeglichen. Ich komme so auf die folgenden Elemente: grosste Helligkeit erreicht haben wird, so glaube ich drin- 'I T = 1890 Febr. 23.95048 M. 2. Berlin gend die Bitte aussprechen zu mussen, dass moglichst viele 0 = 14O 55'41:'94 Ileobachter, besonders solche, welche tiber Cometensucher 1 = IOI 27 25.85 M.-4equ. 1890.0 verfiigen, in der Nahe der in den folgenden Ephemeriden 1 s' = 29 24 6.85 dargestellten Rahn, auch in weiteren Grenzen, den Cometen I sp = 54 8 14.23 I aufsuchen niogen. Bestimmte Notizen iiber den Bereich der I p = 650:'40559 Sachforschung am Himmel werden selbst bei negativern I Ilieselben ergeben mit den Gleichungen Kesultat sehr willkommen sein. I Ich habe. seither die Saturnstorungen fur die beiden x = 19.942821 ?'.sin (2) + 208?025) Umlaufe des Cometen von 1879 bis 1884 und von 1884 I y = [9.98513] r.sin(v+ 126.427) bis 1890 genahert berechnet und im Folgenden beriick- I z = 19.73689; r.sin (v +- 60.565) sichtigt. Ausserdem habe ich einige bisher nicht benutzte die mittlere der nachstehenden Ephemeridcn fiir 12~M. %. I Beobachtungen aus der Erscheinung ,1873 zu dem Normal- Berlin, wlhrend die beiden anderen nach Perihelzeiten ge- l ort fir dieses Jahr hinzugezogen und darnach die Beob- rechnet sind, welche I Tag fruher resp. I Tag spater liegen. Aufsuchungsephenieriden fur den Brorsen'schen Cometen. T= Febr. 22.95048 T= Febr. 24.95048

1890 u1d a'd 1890 ------.-I -. - - - - iMarz 4 Oh 9mr I +2~+~17' oh26m4 4-21" 50' Mar2 4 5 o 6.1 I 25 52 o 15.8 1 24 40 1 o 24.6 I 23 26 5 6 o 2.8 27 26 o 13.0 I 26 ~j I 0 22.4 25 2 6 0 10.0 I 27 jo I 7 23 59.2 ~ 29 0 0 '9.9 26 38 7

8 23 55.3 i 30 33 o 6.7 ~ 29 24 'I 9.806 8.26 ,o 17.1 28 13 8

23 51.2 I 32 5 0 '4.' 9 I 0 3.' I 30 58 I 29 48 9 I0 23 46.7 I 33 35 23 59.2 i 32 3' 0 10.8 3' 23 10 11 23 42.0 35 4 23 55.0 34 3 1 0 7.2 32 57 11 I 8.15 12 I2 23 37.0 , 36 30 23 50.6 35 33 i 9.828 0 3.3 34 30 I 2 ' '3 23 31.7 1 31 54 23 45.8 37 23 59.1 36 2 I3 14 23 26.2 39 16 23 40.8 1 38 28 I 23 54.1 37 32 14 15 23 20:4 I 40 36 23 35.5 39 53 23 49.9 39 I 15 23 30.0, 41 16 ! 9.854 40 28 16 16 , 41 7-73 23 44.9 23 14.3 , 53 I '7 23 7.9 43 8 23 24.1 42 36 1 23 39.6 41 53 '7 18 23 1.3 1 44 20 23 '7.9 ! 43 54 I 23 34.0 43 16 18 '9 22 54.4 ' 45 28 23 11.4 I 45 8 I 23 28.0 44 36 '9 20 22 47.3 ' 4-46 33 23' 4.7 i.+46 20 1 9.880 7.10 23 21.7 4-45 54 20