Central Bureau for Astronomical Telegrams
IAUC 2871: 1975n; P/SCHWASSMANN-WACHMANN 1; Prob. NEW Sat OF JUPITER
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Circular No. 2871
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Cable Address: SATELLITES, NEWYORK
Western Union: RAPID SATELLITE CAMBMASS
COMET WEST (1975n)
R. M. West, European Southern Observatory, Geneva, provides
the following precise positions, measured from plates taken by H. E.
Schuster, O. Pizarro and G. Pizarro with the 100-cm Schmidt telescope
at La Silla. The central condensation, 4" in diameter, is
surrounded by a diffuse halo approximately 20" in diameter.
1975 UT R. A. (1950) Decl. m1
Nov. 8.0334 20 17 29.07 -40 52 28.8 12.5-13.0
9.0293 20 17 39.76 -40 47 28.5
10.0182 20 17 52.33 -40 42 26.2
11.0453 20 18 07.30 -40 37 09.3
The following parabolic elements, by B. G. Marsden, satisfy
the above positions and the means of the positions of the trail
ends given on IAUC 2860 within 2":
T = 1976 Feb. 25.1990 ET Peri. = 358.4198
Node = 118.2262 1950.0
q = 0.196626 AU Incl. = 43.0601
1975/76 ET R. A. (1950) Decl. Delta r Elong. m1
Nov. 24 20 24.07 -39 26.8 2.391 2.083 60.1 12.1
Dec. 4 20 31.99 -38 27.6
14 20 42.63 -37 23.4 2.297 1.750 45.3 11.2
24 20 55.87 -36 12.0
Jan. 3 21 11.79 -34 49.9 2.102 1.386 33.1 10.0
13 21 30.59 -33 10.9
23 21 52.68 -31 03.9 1.784 0.978 24.5 8.2
Feb. 2 22 18.70 -28 05.8
12 22 48.85 -23 17.4 1.303 0.492 19.1 4.5
17 23 03.83 -19 18.9
22 23 11.09 -12 50.1 0.955 0.232 13.5 0.5
27 22 46.19 - 3 00.7
Mar. 3 22 04.01 + 4 09.4 0.810 0.318 16.8 1.6
8 21 36.25 + 7 39.3
13 21 19.43 + 9 36.6 0.941 0.587 35.2 4.6
18 21 08.42 +10 56.1
23 21 00.43 +11 58.6 1.056 0.833 47.8 6.3
Apr. 2 20 48.12 +13 42.0
12 20 36.42 +15 11.4 1.191 1.262 69.6 8.4
22 20 22.81 +16 29.0
May 2 20 06.07 +17 29.9 1.251 1.638 92.3 9.6
12 19 45.83 +18 04.5
22 19 22.62 +18 03.2 1.313 1.979 116.1 10.6
June 1 18 57.78 +17 19.4
11 18 33.24 +15 53.4 1.449 2.296 136.7 11.4
21 18 10.92 +13 54.0
July 1 17 52.11 +11 34.3 1.706 2.595 143.5 12.3
m1 = 7.0 + 5 log Delta + 10 log r
PERIODIC COMET SCHWASSMANN-WACHMANN 1
A. Mrkos, Klet Observatory, provides the precise positions
given below. He notes that the comet was diffuse without nucleus
on Oct. 25 but of stellar appearance the following night. The
condensation persisted and a coma developed during Oct. 27-30, but on
Oct. 31 the condensation was very faint and the coma extremely
diffuse. The comet was evidently fainter than magnitude 18 on July
8-9, Aug. 3-9, Sept. 2-9 and Oct. 2-4.
1975 UT R. A. (1950) Decl. m1
Oct. 25.85255 1 01 21.24 +17 43 36.8 13.3
26.77676 1 00 56.02 +17 40 58.0 13.0
26.79123 1 00 55.83 +17 40 57.3
27.77755 1 00 29.06 +17 38 06.9 13.6
27.79225 1 00 28.59 +17 38 09.2
28.77442 1 00 02.50 +17 35 18.6 13.7
28.78900 1 00 02.26 +17 35 15.8
29.78135 0 59 36.02 +17 32 24.0 13.8
29.79582 0 59 35.67 +17 32 21.8
30.80922 0 59 09.52 +17 29 29.7 14.0
30.82334 0 59 08.93 +17 29 24.7
31.89642 0 58 41.71 +17 26 18.8 14.5
31.91072 0 58 41.34 +17 26 10.3
PROBABLE NEW SATELLITE OF JUPITER
No additional observations have been reported. The following
ephemeris continues that on IAUC 2855:
1975 ET R. A. (1950) Decl. dR.A. dDecl.
Nov. 24 1 00.02 + 4 15.2 +3m00 -13'3
29 0 59.33 + 4 07.7 +3.24 -16.6
Dec. 4 0 58.86 + 4 02.7 +3.39 -19.3
9 0 58.64 + 4 00.2 +3.47 -21.6
14 0 58.66 + 4 00.2 +3.47 -23.4
19 0 58.95 + 4 02.6 +3.41 -24.8
1975 November 24 (2871) Brian G. Marsden
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