199

The Planet was very faint on the meridian on April 12. The Star of Comparison is H. C. 19589. The following are the assumed apparrnt R. A. and N. P. D., which were dcrived from one transit and one circle observatiou of this star taken

Nr. 805. 200

Observatioiis of the Planet discovered by Professor de Gaspnris 1852 March 1;.

Y P

Greenw. M. T. R. A. of Plan. Log. N. P. D. of Plan. - 76"15' 56"O 76 I 5 56,7 76 14 5,s 76 12 41,6 76 11 58,7

April 8 10

'1 KO. of p Comp. Lng. - Star. - clsrv-

--9 7 7940 4 n -998138 1 U

- 998000 7 a -9 9 7907 illeridiaii -977906 -

Ayp. R. A. Ayp. S.P. I). -- - 9" 5 4" 9 ' 0 6 76'23' 23"O 9 54 9,04 76 23 22,9

Kational Oliscrvatory.

Observations of EncEe's Comet, made with thc Filar-Micrometer of the Wasli. Eyuatoreal Ly J. J'erguson, Conimunicated by Lieut. JZaury. (Corrected for refraction).

1852

Jan. 12

14 1 9 22 23 2 4 25 2 6 27

Febr. 2 3 7 8 9

t2 1 4 1 7

29

March 1 3 6

7

10

- -

c

-

KO. of M. T. Wneh. Comp. Star n? Comp. ----

Weisse XXIll. 48.

6 41 0799 6 48 1495 6 5 5 1975 6 43 3397 6 41 3995 6 54 4496 7 2 I499 6 42 0292 6 53 1394 6 55 2232 7 21 1199 6 46 2698 6 58 4 5 9 1 6 44 1490 6 54 5976 7 3 4291

6 54 5894

6 59 3171 6 54 4192 6 52 5594 7 23 4397 6 42 1373 7 3 3599 6 59 796

4 4 6 4 6 5 8 8 3 6

14 10 10 7

13 3

12 8

7

8 9

10 4 3 8 5

- I l l . 111.

8127 U.A.C. WcisseXXIII. 359. 1633 Saiitini.

1635 Santini. Weiase XXIII. 458.

1649 Sanfiiii.

a 8272 R. A.C. 1661 Sarrtini. 8353 U.A.C.

8 Satitini. 31 Santiiii. { 137 B.A.C. }

Wcisse 0, 436 - 491 - 491 - 476 - 476 450

& - * A CL.

CCVI-

+l'"45"2 -1 00,30

From the 12th to the 25th of January the Comet w a s seen with difficulty bearing scarce any illumination. It was faintest on the 12th, 23rd and 24th. On the 25th it covered a small star of the i j t h magnitude which was at first taken as its

19,87

24,44 06,78 19,86 32,05 11,74 39,62 36,14

39,56

56,09 12,68 33,05

32,07

7,88 50,52 30,83 30,66

14,88

21,50

l 5 , M

39,56

4,34

15,55

43,35

A 2.

- 6 35959 + 3 24929

-9

+ l O 50780 - H 42978 - 3 36939 + 3 21962 + 9 06969

+ 4 47928 + 3 07955 + l l 24912 - 6 07971 - 5 43783 + 4 40769 -13 55979 + 2 45964 + I 5 31910

- 2 42763

-11 42909

-16 51780 - 2 55968 - 3 38984 - 4 09980 4-12 29956 4-12 6924 +23 02967

& apparent. &. -

23'' 5"'26"94 5 27,33 7 47,46

14 H , O 8 18 1 2 , 9 j 19 35,75 21 02,17 22 30,95 24 00,18 25 28,36 34 58,95 36 38,27 43 33,03 4 5 16,75 47 05,99 52 3j ,33

23 56 21,06 0 2 06,22

23 56,97

27 38,50 29 14,68 29 11,52 29 5 , 7 5 29 5,09

2 5 21,14

0 25 45,95

6. m8 4 4 52,90 4 14 52,51 4 45 09,15 5 4 5 0 , M 5 I1 56,34 5 18 58,17 5 26 15,03 5 33 47,63 5 4 1 17,47 6 28 50,96 6 37 07,42 7 11 22,67 7 19 39,59 7 28 27,72 7 53 50,58 8 10 31,86 8 31 21,61

9 17 30,07

8 54 6,65 7 59 43,29

7 3 2 12,70 7 31 49,38

4-5 31 13,30

9 12 20,24

7 59 12,21

A

7 7 5 7 7 7 H 8 8 9 8 8 7 8 8 6 H 9

9

10 8 9

10

10

4-.

- -

nucleus. T h e observations of tlie 25th are better than any preceding. From the 25th of January to tbe 8th of February, the Comet encreased in distinctness, presenting a condensation of light, resembling a cluster of s ta rs of the 12th magnitude,

201 Nr. 805. 202

of about two minutes in diameter surrounded hy a coma having three elongatioiis, the central one heing the longest, about three minutes of arc) and its angle of position 70". On tlie 14th February the condensation iiiore bright. with two rays the angle of position of one about 300" and the other 90". The light not nel)ulous and nearly as a t first but fihrous. The dianiettir of tlie central part 2 minutes of arc. On the 3d of lllarcli, the two first coniparisons were made without illuminating the wires. The Coniet then had a crescent ap- pearance, the concave side nest the sun. The condelisation being nearest the southern poiril

1851

Aug. 6 13 16

Octb. 6 8 9

10 15 17 23 31

Nov. i 7

11

- -

-

Stnr.

Weisse XXIIl. 48. - i l l . 8127 I(. -4. C. Weissc SXIII. 359. 1633 Saiitini. 1639 - Weisso SXIII. 458. 1649 SiiIititti. 8272 B.A.C.

1664 Sant ini .

8 Saiitini. 137 B. A. C. Weisse 0. 136. - 491.

476. - 450.

- -'

a

8353 B.A.C.

31. T. Wash.

1311 9" 7x6 12 53 31,l 12 26 5,9 12 50 5 0 , l t l 41 31,9 11 24 10,7 10 39 20,7 l i 18 10 ,2 10 50 41,4 10 33 33,2 10 30 26,9

-

10 2 3 44,2 10 19 05,4 9 21 55,3

10 19 13,8 10 20 49,u

the same diameter a s before. In the observations of the 6th. 7th and 10th of March, the first comparisons were made without illumination. On the 6th nothing peculiar was obser- ved, but on the 7th the Comet presented a conclensation of nearly the siiiiie diameter and appearance a s before with a thin beam of light about 30" in diameter and 11 minutes of arc in length. It was measured with the micrometer its angle of position being 325'55'. This being nearly the direction of the elongations previously mentioned. On the loth this appearance was not visible.

of the crescent arid about I Adopted mean places for 1850,O of s tars of comparison.

?hg.

7.8 i . 8

6 9

8 . 9 8 . 9 8 . 9 6.7

7 9.10

-

- I

t 3

7 7 9 8 9 8

a. - 23h 3'"36' 65 6 23912

12 11969 17 44902 20 38903 21 54942 23, 44927 34 18731 40 32975 42 48967 47 57756

2 3 54 4 3 > 4 9 0 4 6902

26 2 4 > 4 3 29 43940 28 39928 27 45924

0 26 24976

d.

+4'16' 26"75 4 10 56,Oi 4 33 46,32 5 1 3 01,51 5 15 01,60 5 16 36,15 5 35 58,36 6 25 11,67 7 24 51,9 7 16 58,38

-

7 23 15 ,52 8 7 14,90 8 18 19,35 9 28 41,74 8 56 32,19

7 19 13.39 +5 7 41,23

8 2 52,15

Authority. So. elm. . -- - Santirti Cat. Mem. Bstr. Soc. Weissc Catalogue. Santini - Weiaae - Santini - Weisae - Santini - Wash. Equatoreal front precerliiig* 9 Saritini Catalogue.

--

6. A. C. -

0 b s e r r a t i n II s o f P a r t ti e n o p e , made with the filar - niicrometer etc. hy .I. Ferguson. (Corrected for refraction).

xu. of Plan. - Star. Plan. apparent.

1 8 5 8 3 6 4 4

I 4 4 6 8

10 I 0 1 6

colny. * of Corny. A a. - -' - Weisse 11. 81. +0"2i' 43 - 158 - 235 - 235

112 - 112 687 B. A. C.

- - Weisse 11. 7.

1. 963 - 1. 847 574 H. A.C. - \%'eiese I. 675

+ I 15912 -1 3980 -1 2992 + O 36928 - 0 59986 + O 29977 +o 28920 -0 21918 -2 49987 -2 4 5 > 6 0 -0 19986 -0 43923 -0 19907 -5 12909 + l 7976

A d. + 10' 28"82 + 9 i 9 2 2 -12 10912 - i 2 9925 - 9 42956 -21 23920 + I 1 24977 + I 1 15907 + 5 31711 - 8 21964 +12 41943 - 7 42980 - 3 40952 + 5 12985 -14 35902 + I 1 10964

- _ _ a. s.

-rv - 2h 6"46* 87 j-7'30' 52"91

12 5936 7 38 38,51 13 59992 7 39 45,s: I 4 0980 7 39 46,44 8 38987 4 47 48,06 7 2776 4 36 7,44 6 13999 4 30 26,68 6 12927 4 30 16,98 5 22939 4 24 33,03

2 1 1917 3 55 40,73

53 38951 3 12 18,62 46 24942 2 36 7,77 45 34946 2 32 26,27 40 41934 2 12 37,88

I 37 49590 +2 3 21,59

1 59 11934 3 44 25,03

14 *

A.

10 10 10

8 9

10

9 i o

8 9

10 10 8

- -

-

-

205

1851

Nov. 22 26 *)

Dec. 1 *) 14 17 f 8

23 26

- - -

1852 Janr. 24

27 30

Febr. 8 14

No. of M. T. Wash. Cumy. -- gh35'"37'6 1

10 15 2197 5 8 15 1293 6 7 41 I091 3 7 25 2 9 7 4 7 17 1991 3 7 37 895 5 8 39 4192 4 8 32 4292 3

3

7 24 2392 6 7 56 5692 5 9 47 3493 4 8 2 476 6 8 3 11929 4

-

* of Cornp.

91 Santioi. - Weisfie 1. 562

Weisse J. 497 - 540 - 607 - 628

641 B. A.C. Wcivse 1. 1040 672 B . A . C .

Weisse If. 305 711 -

Nr. 805.

Plan. A a. - + t "125 30

-0 10902 -1 13958 -2 8998 -1 24934 -1 6931

+1 31965 +O 37725 -0 14961

+2 11913

- S t m . A d. - + 4' 2"OO + 6 30992

+ I 3 55955 + 1 33725 + I 4 27914 +19 4960 - 0 26985 + 4 23929 -- 1 39942 f 2 9761

+O 12958 + 2 32971 +2 4970 - 4 2797.5 +O 19786 + 0 1 9 6 7 -2 10188 + 2 49977 4-3 13929 + 1 12986

Planet a.

lh31"53' 83 1 30 31735 1 29 27789 1 29 55946 1 30 40907 I 30 58710 1 30 58704 1 32 51942 1 34 16721 I 3 1 16931

- apparent. d. I) +l 53' 46"42 1 56 15,48 2 3 40,28

2 56 31,23 3 1 8,64

3 26 25,33 3 42 51,49 3 42 55,75

2 43 37,55

3 1 9,79

I 57 14979 7 3 53,62 2 0 27763 7 27 43,19 2 J 51779 7 52 21,42 2 I 4 21911 9 5 12,41 2 22 1791 +9 54 54,24

*) The observations of NOV. 26. nnd Dec. 1. are doubtful. The obeervations to the 16. dugust have been published in the Astr. Nachr. and .4str. Journal.

Adopted mean places for 1850,O of stars of comparisot~.

Star.

Weisse 11. 81 -

158 235 112

687 B. A.C. Weisse J I . 35

11. 7 1. 963 - 1. 817

- 574 B.A. C. Weisse,I. 675 91 Satitini. Iveisse 1. 562

497 540 607 628

- - - - 641 B.A. C. Weisse 1. 1040 *) 672 B. A. C. 741 - Weisse JI. 305

Mag. - 9 7 8 9 7 9 8 9 8

4.5 8.9 7.8 8.9 8.9

9 9

9.10 7 7 6 7 8

a. - 2h 6'" 1 5 ' 0 6

10 45967 11 59908 7 56989 5 38945 3 45924

2 I 51915 1 53 52956

47 1978 45 47955 36 36930 30 35972 3 1 58975 28 40996 31 11915 33 33935 34 25930 56 56972

I 58 17946 2 3 26947

16 29993 2 18 43924

6. +7'20' O"58

7 29 7925 7 51 31959 4 57 0942 4 18 3194 4 3 31969 3 31 12970 3 19 30907 2 39 16996 2 26 4196 1 5 1 39758 1 19 12967 2 41 33991 3 1 6916 3 21 31998 3 4 1 1906 3 40 16941 7 0 5 3 ~ 6 '7 31 43,44 7 51 53908 9 1 57925

+9 53 16915

-

A.

10 7 8 9 4 8

7 7

- -

- 8 9 7 8 8

Authority. \ -

Weisse Catalogue.

B. A. C. (ht;tloguc. Weissc? ('ataloguc.

a. li. Grreirw. 12-y. Cat. - 6 from B. A.C. Weisse Catalogue. Saritiiri Catalogue. W e i s w Catalogue.

B. A. Catalogue. Sarttini Catalogue.

Weissc Catalogue.

*) This star is erroneously marked in Wcisse R B of the 9th magnitude. BerteL i n the zone8 and Satttini both put it at 7.