Central Bureau for Astronomical Telegrams
IAUC 2756: 1975b; 1944 III; 1974h
The following International Astronomical Union Circular may be linked-to from your own Web pages, but must not otherwise be redistributed (see these notes on the conditions under which circulars are made available on our WWW site).
Read IAUC 2757
Circular No. 2756
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
PERIODIC COMET WEST-KOHOUTEK-IKEMURA (1975b)
The following precise positions have been reported:
1975 UT R. A. (1950) Decl. m1 Observer
Feb. 28.42674 2 48 01.44 +16 10 29.7 12 Kojima
28.44063 2 48 03.57 +16 10 55.8 "
28.47778 2 48 10.3 +16 12 16.0 11 Seki
28.48854 2 48 11.5 +16 12 39.7 "
Mar. 1.02397 2 49 33.23 +16 30 37.4 Schwartz
3.51597 2 55 55.80 +17 53 02.7 12 Seki
3.52361 2 55 56.86 +17 53 15.0 "
N. Kojima (Ishiki, Aichi). Measurer: H. Kosai. Comet diffuse
without condensation. Communicated by K. Osawa.
T. Seki (Kochi Observatory, Geisei Station). Comet diffuse without
condensation. Communicated by K. Osawa.
G. Schwartz (Harvard College Observatory, Agassiz Station). 41-cm
Metcalf astrograph. Measurer: C. Y. Shao.
Orbital calculations by B. G. Marsden show that comet
Kohoutek-Ikemura is identical with comet West (IAUC 2751). The following
elliptical elements satisfy the observations on IAUC 2751 and five
of the current observations within 4". It is also clear that the
comet passed only 0.01 AU from Jupiter in March 1972.
T = 1975 Feb 25.879 ET
Peri. = 358.077 e = 0.57991
Node = 84.691 1950.0 a = 3.32646 AU
Incl. = 30.061 n = 0.162454
q = 1.39741 AU P = 6.067 years
1974/75 ET R. A. (1950) Decl. Delta r m1
Sept.10 1 40.34 -45 15.5 1.433 2.206 14.2
20 1 35.04 -47 28.2
30 1 25.63 -49 07.3 1.312 2.072 13.8
Oct. 10 1 13.02 -49 56.4
20 0 59.07 -49 42.9 1.242 1.940 13.3
30 0 46.20 -48 20.9
Nov. 9 0 36.46 -45 53.0 1.212 1.812 13.0
19 0 31.07 -42 26.1
29 0 30.34 -38 09.8 1.210 1.692 12.7
Dec. 9 0 33.94 -33 13.5
19 0 41.34 -27 45.2 1.227 1.585 12.4
29 0 51.97 -21 52.5
Jan. 8 1 05.31 -15 42.3 1.265 1.497 12.3
18 1 21.03 - 9 21.5
28 1 38.89 - 2 57.3 1.326 1.433 12.2
Feb. 7 1 58.73 + 3 22.9
17 2 20.58 + 9 31.9 1.414 1.401 12.2
27 2 44.47 +15 22.7
Mar. 9 3 10.49 +20 48.6 1.529 1.403 12.4
19 3 38.76 +25 44.0
29 4 09.34 +30 03.3 1.669 1.439 12.7
Apr. 8 4 42.16 +33 42.2
18 5 17.01 +36 36.9 1.831 1.505 13.1
28 5 53.41 +38 45.3
May 8 6 30.67 +40 06.9 2.011 1.596 13.5
18 7 08.02 +40 43.3
28 7 44.61 +40 38.3 2.206 1.705 14.0
m1 = 10.0 + 5 log Delta + 10 log r
PERIODIC COMET DU TOIT 1 (1944 III)
Mr. C. Torres, Department of Astronomy, University of Chile,
informs us that he has recently located faint images of this comet
on plates taken last year with the Maksutov astrograph at Cerro El
Roble. He provides the following precise positions:
1974 UT R. A. (1950) Decl. m1
Mar. 22.40146 21 01 20.43 -31 26 15.5 19
Apr. 22.40854 23 03 24.76 -22 30 51.9 18-19
The March image is near the edge of the plate. On the April plate
there is a centrally condensed coma 1' in diameter. The two positions
are consistent with the line of variation for this comet and
indicate that T = 1974 Apr. 1.50 UT (cf. IAUC 2601, 2649). It is
not proposed to give the comet a preliminary designation.
COMET BENNETT (1974h)
Mr. Torres also communicates the following additional approximate
positions of a very large, diffuse, uncondensed, unmeasurable
image that is most certainly this comet (see also IAUC 2746):
1974 UT R. A. (1950) Decl.
Dec. 9.04850 21 34.0 -66 35
9.06274 21 34.3 -66 29
1975 March 7 (2756) Brian G. Marsden
Read IAUC 2757
Our Web policy. Index to the CBAT/MPC/ICQ pages.
