21 Nr. 1513. 12 A& Ad I i?f, = 146' 14' lO"2 -- 1864 April 13 -26'39 +2' 40"4 14 26,24 3999 23 25,73 3595 im Mittel also ALY = -26'12, Ad = +2'38"6. Es zeigt sich, dass diese Ahweichungen fast ganz weg- gesch'afft werden, wenn nian Moss die niittlere tagliche si- derische Bewegonp urn +OU833 veigrcssert , untl ich habe daher angenonirnen, fiir die Epoche 1865 Jan. 0,O rnittlere Berliner Zeit : - - 58 10 4198 - - 2 27 56917 - 7 48 20942 = 812"4010 = 0,4268241, - - 2 8 3990 nrittl.Aeq. 1865,O. - woniit die Ephemeriden ini Supplenient des Berliner Jahr- buchs fiir 1867 herechnet siri$. C. H. F. Peters. Observations of Echo (60) made at t,he Hamilton College Observatory during the last two oppositions. 1863 June 13 14 15 16 25 26 27 July 19 .2 4 Ham. Coll. M. T. p- 12h59" 0'1 12 17 33,4 11 51 10,2 11 16 37,l 13 55 58,5 13 24 12,s 13 33 31,O 10 13 55,4 12 19 34,5 - +2'"30'13 +1 40,63 +O 49,80 --0 5,26 -1 32,68 +1 14,34 +O 16,47 -0 44,OO --0 27,59 -* Ad + 1' 47"8 +l 3077 +I 796 $0 4195 +I 2370 +1 3198 -0 1290 - +o 4192 +1 1291 .3i of Coiop. 10 12 10 24.7 10 10 24.7 15 10 - ? apparent a d ' - ' 19'1 l'"21'21 0 31,73 18 59 40,92 58 45,89 51 17,73 '50 11,76 49 13,90 48 13,46 18 26 59,51 - -- 17' 16' 40"2 16 5792 17 2092 17 4693 22 3697 23 3193 21 2199 25 1590 -17 51 4871 log (P"A> in OL in d 9,9895n 0,8693 0,3015n 0,8653 0,4123n 0,8617 9,92 18n 0,8697 0,3692n 0,8617 0,3591 0,8641 0,1897 0,8680 0,2884 0,9662 9,8274n 0,8723 -- Comp. star a a a b - a C c c d 1864 Oct. 4 11 17 13,5 +I 32,38 +O 5590 6 2 9 17,66 +ll 37 2191 0,4908a 0,6624 e : 11 17 li,l 4-2 19,12 -1 4597 6 9 17,77 37 2194 0,49081~ 0,6624 f 21 12 35 58,7 4-4 37,37 +I 2894 8 I 55 17,67 9 40 1094 0,1063 0,6727 9 25 11 56 30,8 +l 18,66 -2 5477 10 51 38,32 10 4590 9,8253 0,6769 h Nov. I 13 51 53,7 +O 37,81 +4 3591 15 45 12,80 8 19 4196 0,6396 0,7076 i 2 11 32 47,s --0 8,97 -1 3896 18.6 1 44 26,02 + 8 13 2799 0,0321 0,6882 i These observations are made with the filar-micrometer, The differences het- The mean places of the comparison stars for the hegin- bright wires in (lark field, power 270. ween star aud planet are cleared of refraction. Ding of the resp. year have been assnrned as follows: 54 50,23 19 4 59,28 b .18 52 46,26 c 48 53,2-2 d 27 22,70 I9 56,79 56,77 d Authority -1 v d -1 7' 18' 37"2 9. I Om; det. I)y 4 fil.-rnicr. obs. froiii each of the two f")lluwing : 1 I 4597 0eltz.-Arg. 18984. 13 2094 : 19249. 24 991 : 18950. 25 1292 : 18870. 53 8 9 1 52 1694 6"'; mean of 1 1 '";by 4 fil..micr. corny. with 16 9 4 0eltz.-Arg. 18218. a 3 Auttinrity d 18h19"'56'78 -1f052'45"3 Cambritlge,Eng.,Ohs. 1849. 56,82 4796 12y. Cat. 1603. e 2 7 10,84 +ll 36 693 Weisse 2'l, 96. 6 54,21 38 4792 : 2h, 79. 9 1 50 35,74 9 38 2090 Riiniker, n. F. 1002. a 50 15,07 13 17 9 6 (w. I h, 880) I,eit!en, merid. ohs., Astr.Nachr. X 1498. i 8 11 44 9 0 10"; det. hy 3 GI.-m. comp. with '- - ./ f 44 30,41 17 11,84 6 3395 VC'eisse l", 837. The Imsition of W. Ill, 837, upon which depend the planet's psitioris ol Nov. 1 and 2, requires redeterininalion by modern nicritliari oliservations. Hamilton College Ohservatory Clinton, in December 1864. C. M. F: Peters.

Observations of Echo (60) made at the Hamilton College Observatory during the last two oppositions

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Page 1: Observations of Echo (60) made at the Hamilton College Observatory during the last two oppositions

2 1 Nr. 1513. 12

A & A d I i?f, = 146' 14' lO"2 -- 1864 April 13 -26'39 +2' 40"4

14 26,24 3999 23 25,73 3595

im Mittel also ALY = -26'12, A d = +2'38"6.

Es zeigt sich, dass diese Ahweichungen fast ganz weg- gesch'afft werden, wenn nian Moss die niittlere tagliche si- derische Bewegonp urn +OU833 veigrcssert , untl ich habe daher angenonirnen, fiir die Epoche 1865 Jan. 0,O rnittlere Berliner Zeit :

- - 58 10 4198

- - 2 27 56917

- 7 4 8 20942 = 812"4010 = 0,4268241,

- - 2 8 3990 nrittl.Aeq. 1865,O.

woniit die Ephemeriden ini Supplenient d e s Berliner Jahr- buchs fiir 1867 herechnet siri$.

C. H. F. Peters.

Observations of Echo (60) made at t,he Hamilton College Observatory during the last two oppositions.

1863 June 13 14 1 5 16

25 26 27

July 19

.2 4

Ham. Coll. M. T. p-

12h59" 0'1 12 17 33,4 11 5 1 10,2

11 16 37 , l 13 55 58,5 13 24 12,s 13 33 31,O 10 1 3 55,4

12 19 34,5

- +2'"30'13 + 1 40,63 + O 49,80 --0 5,26 - 1 32,68

+ 1 14,34 + O 16,47 -0 44,OO --0 27,59

- * A d

+ 1' 47"8 + l 3077 + I 796 $ 0 4195 +I 2370 +1 3198

-0 1290

- +o 4192

+1 1291

.3i of Coiop.

10 12 10

24.7 10 10

24.7 15 10

- ? apparent

a d '-'

19'1 l'"21'21 0 31,73

18 59 40,92 58 45,89 5 1 17,73

'50 11,76 49 13,90 48 13,46

18 26 59,51

- -- 17' 16' 40"2

16 5792 17 2092 17 4693 22 3697 23 3193 21 2199 25 1590

-17 51 4871

log (P"A> in OL in d

9,9895n 0,8693 0,3015n 0,8653 0,4123n 0,8617 9,92 18n 0,8697 0,3692n 0,8617 0,3591 0,8641 0,1897 0,8680 0,2884 0,9662 9,8274n 0,8723

-- Comp. star

a a b

- a

c c d

1864 Oct. 4 11 17 13,5 + I 32,38 + O 5590 6 2 9 17,66 + l l 37 2191 0,4908a 0,6624 e : 1 1 17 l i , l 4-2 19,12 - 1 4597 6 9 17,77 37 2194 0,49081~ 0,6624 f

21 12 35 58,7 4-4 37,37 + I 2894 8 I 55 17,67 9 40 1094 0,1063 0,6727 9 25 11 56 30,8 + l 18,66 -2 5477 10 51 38,32 10 4590 9,8253 0,6769 h

Nov. I 13 51 53,7 + O 37,81 +4 3591 15 4 5 12,80 8 19 4196 0,6396 0,7076 i 2 11 32 47,s --0 8,97 -1 3896 18.6 1 4 4 26,02 + 8 1 3 2799 0,0321 0,6882 i

These observations are made with the filar-micrometer, The differences het-

The mean places of the comparison stars for the hegin-

bright wires i n (lark field, power 270. ween s tar aud planet are cleared of refraction.

Ding of the resp. year have been assnrned as follows:

54 50,23 19 4 59,28

b .18 52 46,26 c 48 53,2-2 d 27 22,70

I 9 56,79 56,77

d Authority -1 v d -1 7' 18' 37"2 9. I Om; det. I)y 4 fil.-rnicr. obs.

froiii each o f t h e t w o f")lluwing : 1 I 4597 0eltz.-Arg. 18984. 13 2094 : 19249. 24 991 : 18950. 25 1292 : 18870. 53 8 9 1 52 1694 6"'; mean of

1 1 '";by 4 fil..micr. corny. with

16 9 4 0eltz.-Arg. 18218.

a 3 Auttinrity

d 18h19"'56'78 -1f052'45"3 Cambritlge,Eng.,Ohs. 1849. 56,82 4796 12y. Cat. 1603.

e 2 7 10,84 +ll 36 693 Weisse 2'l, 96. 6 54,21 38 4792 : 2h, 79.

9 1 50 35,74 9 38 2090 Riiniker, n. F. 1002. a 50 15,07 13 17 9 6 (w. I h, 880) I,eit!en, merid.

ohs . , Astr.Nachr. X 1498. i 8 1 1 44 9 0 10"; det. hy 3 GI.-m. comp. with

'- - ./

44 30,41 17 11,84 6 3395 VC'eisse l", 837.

The Imsition o f W. Ill, 837, upon which depend the planet's psi t ior is ol Nov. 1 and 2 , requires redeterininalion by modern nicritliari oliservations.

Hamilton College Ohservatory C l i n t o n , in December 1864. C. M. F: Peters.