ASTRONOMISCHE NACHRICHTEN.

Double-Star Observations made at the Lick Observatory by S.FKBurnkarn. (Communicated by the Director Prof. Edward S. Holden.) The following are the principal double-star observations made by me with the thirtysix and twelve inch re- fractors of the Lick Observatory in August, September and October of the present . In this list, as a rule, only the stars are given which have been measured on at least three nights. Unless othenvise stated in the notes, the new double-stars were discovered with the I 2 inch telescope. The aperture of the instrument with which the micrometrical measures were made is given in the last column. New Double-Stat& Lal. 58. < Piscium. RA. oh~"48' Decl. +5 zo 5 7'. RA. xh 71n27' Decl. +6O 56'.

1888.681 24400 oY98 - , 11.5 12 -695 248.2 0.91 - , 10 I2 a796 I 331.7 I 0.50 I 8-5 1 9 I 12 0.88 - , 11.5 I2 1888.76 I 329.6 I 0.48 1 8.1, 8.9 [ -7 14 254.7 .7 20 247.1 0.94 - , 11.5 I2 This star is 7'" in Lal., and 6.5 in DM. -733 249.6 0.96 - , I1 I2 I 888.7 I W? oh200 = DM. +20?15. RA. oh P44' Decl. +zoo 50'. I 888.681 63.4 23.75 -- 12 -- .695 64.0 23.86 9 12 -- 1-44 10.5 .698 63.1 23.91 - 12 -- -7 r4 63.5 23.61 -- 12 -733 63.6 23.48 -_ I2 Discovered with the 36 inch. 1888.7 I y Cassiopeiae. The bright stars appear to be relatively fixed, but with a common . Struve found: RA. 0~48~50~Decl. +60° 1'. 1832.83 63P7 23:46. 1888.668 255.0 2.17 - 9 11 36 .671 255.2 2.13 - , - 36 w, 3h5 = DIM. +21?413. .678 254.7 2.03 - 9 11 36 RA. 3h3m~I' Decl. +2i0 17'. .681 257,s 1-33 - , 11.5 I2 1888.821 162.1 0.64 8 , 8 12 254.9 2.26 - 9 11 36 -695 .832 168.3 0.63 8.5, 8.5 12 258.0 2.17 - , I1 I2 1 I -733 1 335 163.3 0.47 8.6, 8.6 IZ 1888.83 I 164.6 I 0.58 I 8.4, 8.4 I Discovered with the 36inch. Well seen with the Discovered with the 36 inch. I z inch. The following measures were made of the distant companion (= j3 499) a Tauri (). +I I 348.8 52-53 - I 14 36 RA. 4h~9~2' Decl. 6O 6'. 1888:iiiI 348.4 I 52.35 I -, 13 136 A and B (= fl 550). The two sets of measures indicate no change: 1888.813 1 110.0 i 30.88 I - , - I 36 1878.80 34806 52:27 fl 2n 335 I 109.0 1 30.91 I - , - I 36 1888.68 348.6 52.44 @ 2n. 1888.82 1 109.5 1 30.9; I - , - I Bd. 120. IS A and C (= 2' 2 App. 11). v* Sagittarii. 1888.772 3507 116:'98 - , - 36 RA. 18~47~5is Decl. - 2~~49'. 343 34.5 I 16.88 - - 36 1888.681 I 10400 1 1:37 SIi2, 11 I 12 .832 1 34.5 I 116.86 1 - - 1 12 Discovered with the 36 inch. 1888.81 34.9 I 116.91 I - , - I 7 Aquarii. C and D. RA. zoh 5omz5' Decl. - I 0' 9'.

1888.772 286.0 3.02 - , 12 36 1888.600 164.6 1.90 -813 2795 2.00 rz 36 .835 I 277:1 I 2.00 I : I2 I 36 .714 165.3 2.21 1888.81 i 281.1 I 2.34 I 9 12 I .733 164.0 2.18 The faint stat near the old companion was detected 1888.68 165.0 1 2.09 1 6 11.7 I with the 36inch. I Found with the 3Ginch. ci Orionis. R.4. 5h3z"43* Decl. -2'40'. B.A.C. 7422. RA. 21~x7~16~Decl. -26"4'. A and B. 1888.714 199.2 0.96 8 , 10.5 12 1888.775 358.3 0.18 4 , 6 12 -733 199.9 .813 356.2 0.27 36 .777 1 197.1 I 8" ; :Of5 I :: .818 I 356.4 I 0.27 I 1 I 36 1888.74 I 198.7 I1 1.05 j 8 10.7 1 Yarn. 9529. RA. 11~40~59~Decl. -17~51'. AB and C (2762). 1888.675 204.8 4.62 11.5 12 1888.832 236.7 11.04 - , - I2 204.4 A32 236.8 11.42 - - 36 1;;; I 205.7 I :::: 1 g85:, :: I :: 1888.74 205.9 4.53 8 , I1 .851 I 237.9 I 11.24 I -1 - I 12 i I i 1 1888.84 1 237.1 I 1.1.23 i - , - I W, 22h854 = DM. +12?4888. RA. 2 zh41~5 6a Decl. + I 2O 2 2'. AB and 1) (3762). 1888.832 83.9 12.90 - , - I2 .832 83.2 12.97 36 .851 I 82.8 I 12.66 I 1 7 I 12 11 I2 1888.84 I 83.3 I 12.84 I - - i 1888.81 I 224.4 I 0.66 I 8.7 10.8 \ Found with the 36inch. The preceding star ot a and E. AR wide pair. 1888.851 j 60.5 I 41.18 I - , - I I2 DM. +4104881. This star has been known as a wide triple since H. RA. ~3~45~31'Decl. +4r0 25'. 'rhere is no change in old companions. 2 gives: 1888.681 160.5 0.64 8 8 12 1831.42 23605 11:'oo '57.5 1831.20 84.5 12.86 ,763'755 I 154.9 I E::: I ::::8":: I :: The close pair is difficult with the ~zinch, with 1888.73 1 157.6 I 0.60 I 8.3 , 8.3 1- which it was discovered. In DM. 6m7, but only 74L4 in Kadcliffe.

8 392 (B.A.C. 46). @ 491 (d Xndromedae). RA. oh 10~31' Decl. +60° 52'. RA. 0~32~54'Decl. +30° 12'. 1888.706 6709 19:71 6 , 13 12 1888.706 30002 27705 - t '3 12 .709 68.8 1941 11.5 IZ -709 298.4 28.00 - I2 .7II 1 67.8 I 20128 I 11 12.5 I 12 .711 I 300.4 I 27.74 I - : r_' I I2 1888.71 I 68.2 1 19.80 I 6.5 12.3 [ 1888.71 I 299.7 I 27.60 I - 12.5 I No other measures of this pair. The only other measures are: 1878.40 299?3 27786 fl 3n. 293 2875 294

fl 231 (u Cassiopeiae). R4. oh 38m2a Decl. +47" 38'. t888.706 30306 32189 - , 11.5 12 1888.681 I 29501 0172 5 6 12 303.1 32.50 .698 299.2 0.72 4liY1 6 xz 1;:; 1;:; I 303.9 I 32.50 1 1 :::: 1 :: 0.76 5 611, 12 1888.71 I 303.5 I 32.63 I - , 11.6 1.10 5 6112 12 The only earlier measure is: 1876.51 303!'9 32181 De rn.

/I 396 (B.A.C. 282). K.4. oh 56"13' Decl. 02 38 (y -4ndromedae). 11888.681 66.5 1.27 6.5 10 12 RA. 1~56~32~Decl. 3-41~45'. .7 20 66.4 1.14 12 1 6.3 I 9 *733 66.8 1.22 6.3 8.5 12 1888.600. Only a slight elongation in the direction .758 1 67.4 I 1.37 6 , 9.5 12 Df xzoo with 2700 on the 36inch.

~ 1888.72 I 66.8 I 1.15 :No evidence of change: 1877.05 6604 1!'24 De 4n. 1888.678 55.3 I 0.99 - - j 36 /I 999 (w Andromedae). .681 . 61.9 1.19 1 - 9 I1 60.5 1.10 - , 8.5 I? RA. xh 20~27' Decl. +44O 47'. .785 j 1

A and B. 1888.681 95.1 2.29 - , I2 I2 .706 94.7 2.7 3 11.5 I2 .7 I I 96.3 1 2.90 I : - XI 1888.70 95.4 I 2-64 I - 9 11.8 I fl 547 (47 Tauri). A and C. RA. 4h ~~25'Decl. +go $8'. 1888.706 110.4 132.62 - - I2 1888:;;; 363.2 0.98 1 - IfO.5 132.55 - - I2 1 1 -709 359.0 0.90 1 5 1 8 11 351 109.9 132.30 - I2 1 I -: 1 332 357.0 0.85 5.5 8.5- II 1888.7 5 110.3 131.49 r2 I I -, - 1- 1888.81 I 359.7 I 0.91 I - , - I C and D. There seems to be no relative motion thus far: 1888:;:; 1 136.5 I 5.06 1 10.5, 10.5 12 1877.90 35907 0182 De3n 138.7 4.91 , 10 10 1 I2 1878.42 359.7 0.89 a 6n. .851 137.5 4.91 1 - , - I2 1888.15 1 137.9 I 4.96 I 10.2, 10.2 I B 5 18 (40 Eridani). -There is a faint star between the pairs. RA. 4h 9"s 2' Decl. - 1" 4 7'. and C. fl 506 (7 Piscium). B RA. xh ~5~4~Decl. +14O44'. II 12

1888.84 1 106.8 I 2.94 I - - I

1888.73 1 16.5 I 1.10 I - , 10 1 .The only other measures are: 1878.73 1209 I:OZ fl 3n 1880.12 14.2 1.16 /I 3n. 295 2875

Procyoa rJ I 5 I (# Uelphini), RA. 7h 33'1' Decl. +go 33'. RA. 2oh 31~55~Decl. f 14I I' A P,. 1888.818. Carefully examined with all powers up and to 3300 on the 36inch under favorable conditions. Large 1888.592 3~6?4 0:a 8 star single, and no near companion. .605 300.6 0.43 .613 327.1 0.35 .652 300.~ 0.20 A. C. 15 (99 Herculis). *655 323.9 a.I 6 300.0 0.2 I RA. 18~2m~81 Decl. +30° 33'. -714 -723 3 I 2.8 --0.3 7 1888.733. Apparently single with the 36inch, a5 1888.65 310.1 0.19 on previous nights with the r2inch. The last measure of and C. this pair was made by me in 1881. A 116.6

3888.811 I 115.7 j 16-77 1 - , - i A and D (= 272704). 1888.592 26001 0"s - , - 12 332.8 36.57 - , - -600 255.9 0.66 - , - I2 188*:ia:1 333.6 1 36.13 1 - , - .605 2584 0.86 - - I2 1888.82 I 333.2 I 36.35 1 , - I *.. - - -6t3 255-4 0.73 I I1 The last computed (Celoria, A. N. 2824) gives .636 256.8 0.64 , - I2 - I period of 16.95 . The latest published measures. .681 257.9 0.75 - , I2 - ire by Engelmann (A. N. 2786): 1886.91 219!5 0:39 4n.

Ho. 149. RA. a 1" 1~16.Decl. - I 2* 10'. 1888.714 -717 327.0 -73I -733 I 326.2 I - 1 8.5 9.0 1 12 r888.72 I 326.8 I 0.90 I 8.2 , 8.7 I Discovered by Hough at Chicago. He makes the :omponents equal, and gives: 1885.25 I5504 Or54 8.5, 8.5 2n.

y Equuki. KA. 21~4~30~Ded. +9O39'. A and B. 8 Capricorni. I 888.8 I 3 RA. 10" 14'2' Decl. - I 5" 10'. .82 I 335 215.9 1888.644 114.5 0.90 - , 10 I1 1888.82 .652 100.3 0.66 I1 275.4 I 2.14 i - - I ,655 1 101.8 I 0.13 1 1 1 12 A and C. 1888813 43.26 421 1::; ] 43.41 I f -~ -835 I 43-31 I2 Discovered by Barnard in 1883 during an occultation 1 :t - by the moon. The only other measures are: 1888.8s I 9.2 I 43.33 I - , - I Close star discovered Knott. 1884.59 10508 0%5 @ 3n by Apparently fixed. 1886.1s 109.6 0.83 Ho an. 1867.50 376% 2:13 Knott. 297 2875

02 535 (a Equulei). B 77. R.1. 21~8~38'Decl. +9O31'. RA. 2~~27~51~Decl. -2'24'. A and R. 1888.731 21$5 "70 8.2, 8.5 -733 213.0 I 2.96 I 8.5 , 8.7 I ii a733 194.7 .182 213.3 2.64 8.8 , 9.0

1888.75 213.3 I 2-77 I 8.5 t 83 I Glasenapp (A. N. 2771) finds a period of I 1.5 years, A and C. making this the most rapid binary known. His ephemeris 1888.731 226.4 28.28 - 1 I1 I2 makes the position angle 20107 and the distance or44 for 224.7 2924 - 108 12 1888.21. In the first measure given above it was noted -733 .782 225.7 I 28:87 - 1 1115 I I2 that the smaller component was the following side. I on The measured distance is certainly not too small. 1888.7 5 225.6 I 28.80F1 11 Probably B lout change. fl 989 (x Pegasi). @ 45 I (I 5 Lacertaej. RA. 2 ih39'"' zS Decl. +2 5' 6'. RA. ~2~46~37"Decl. +42'40'. A and €3. 129.3 29.25 5 , 12 I2 1888.711 270.7 0.33 - , - I2 1888:~~~128.4 I 28.89 - 12 I2 .818 275.4 36 1 I .8z4 278.0 36 .71x 127.8 30.65- - , 12 12 ~--1 1 :::: 1 1: 7 I 1888.71 I 128.5 I 29.60 I - , 12 1888.78 I 274.7 I 0.23 I - I - I No other measures. A and C (Ss824). p 80. 1888.818 I 300.8 I 12.00 I - , - i 36 RA. ~3~ 12~42' Decl. +4O 45'. A24 I 300.7 I 12.43 I - - 1 36 1888.675 321.6 0.94 8.5 , 9 r2 1888.82 300.7 I 12.22 I - , - I I I2 This close and difficult pair, discovered in 1880, is 319.0 81 9 1::: 1::: I 318.1 :::: 8 , 8.7 I2 apparently in rapid motion. The only other measures are: 1 1 .731 I 319.4 I 0.92 I 8.3,- 8.8 I 12 1880.68 13709 oY27 4n. 1888.71 1 319.5 1 0.92 I 8.2 , 8.9 I B 276 (a Piscis Austrini). Argelander gave the proper motion of this star or558 R-i. 2xh 53"57" Decl. -29' 2'. in the direction of 10x05. From a comparison of the above measures with the earlier observations, it is evident 1888.731 116.3 I .04 I2 that it is a physical pair., .782 119.7 - I2 1875.80 30004 1Y07 De 4n 118.7 I .98 *793 I2 18.81.69 312.2 0.91 @ 3n. 1.80 -12 1.61 I Ho. 199 (95 Aquarii). B 174. RA. 23h I~~43~ Decl. - 10' I 6'. RA 22h22m58r Decl. --1o'17'. 1888.714 223.3 1.31 4 , I1 I2 226.0 - , 11.5 I2 1888.675 289.7 8.05 8 , 10.5 I2 I 1 :::; I .736 219.0 - , 12 I2 .196 293.2 9.08 8.5 , 10.5 I2 - .832 1 292.1 I 8.73 I 8.5 II I2 1888.77 ] 291.7 I 8.62 I 8.3 , 10.7

stantially the value given above. fl 703 (a Lacertae). 1888.711 93.4 5.5 , 7 12 2zh 26"'20' Dd. +49'40'. 0.51 RA .785 84.8 0.68 6 8.5 12 I2 1 '3 12 .851 81.9 0.92 - , - I2 .859 81.5 0.56 6 , 8 12 -12 1888.71 I 297.8 I 31.59 I - , 12.2 The only other measures are: 1878.02 29808 30716 @ 211. 299

@ 386 (B.A.C. 8173). The close companion, since its discovery in 1878, RA. 23h2im~2PDecl. +70° t'. ias passed over about z13O of its orbit. This pair has ilways been from the faintness of the companion i~.difficult 1888.706 31306 20Y90 7 , 11.5 12 2bject; and all the previous measures were made with the .709 1 312.0 I 20.36 1 7 , XI I I2 Chicago 181/,inch refractor with which the star was found. .711 I 313.6 10.80 7.5 , 11 12 rhe following are all the measures of the close pair: 1878.73 z74:o 0'67 @ 3n 1879.46 284.6 0.75 @ jn 1880.54 298.3 0.68 @ 5n 1881.54 311.5 0.58 I., in 1883.75 333f -- ,3 I n 1888.69 126.7 0.95 @ 5". Mr. J. M. Schaeberle of this Observatory has recently computed an approximate orbit, and finds a period of 11.3 years. For the next eight or ten years the distance should be about the same as at the time of discovery, and hence readily measured with moderate apertures. The change in the position of the third star, C, is due to the proper motion of the principal str. Some of the measures are: 1878.54 3306 I4:40 19 4n 1879.17 30.4 14.96 @ 8n 1880.57 . 250 15.41 fi 6n 1881.54 20.8 16.29 @ 4n 1882.77 17.1 17.34 3 3n 1888.69 0.9 21.71 Ii 56. From the measures of A and C, Mr. Schaeberle finds the annual proper motion of the principal star to be 1:305 in the direction of 14003. The fourth star D has changed its position from the same cause. The only other measures of this are: 1878.96 27701 61:13 8 In 1880.56 278.0 64.15 8 In.

B 482. 1888.668 123.0 0.84 I - , -- 36 RA. ~3~~6~44' Decl. +62"39'. .678 126.1 0.91 , - , - I2 .681 132.0 -- 12 A and B. 128.7 - - 36 .695 ::'tE 1 1 1888.706 34402 4761 9 , 10 ' 12 .ti1 , - 1 It 113.9 I 0.91 - -709 344 1 451 I0 I2 - -.__-711 1 343:l I 4:67 1 9' 1 10 1 12 1888.71 I 343.8 I 4.60 1 9 , 10 J 1888.652 1 1.4 ~1.47I - , - I2 A and C. .655 0.4 21.86 - , - 12 .663 I 0.5 22.04 - , - I2 1888.706 126.0 9.99 - , II 12 -709 124.6 9.80 - , 11 12 -675 1.4 21.76 - , - 12 1 1 1 1 .695 I 0.9 21.40 - , .711 121.1 9.57 I -, 11.5 j I2 1 - I 36 - .- 1888.71 I 123.9 I 9.79 I - , 11.2 1 Dembowski found: 1876.80 34207 4707 In. S. W.Burnham.