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Double-Star Observations Made at the Lick Observatory by S.Fkburnkarn

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Double-Star Observations Made at the Lick Observatory by S.Fkburnkarn 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 year. 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 proper motion. 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 (Aldebaran). +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.
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