Central Bureau for Astronomical Telegrams
IAUC 2746: 1972 XII; 1974h; 1974a
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Read IAUC 2747
Circular No. 2746
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 ARAYA (1972 XII)
The following precise positions have been reported:
1973/74 UT R. A. (1950) Decl. m2 Observer
Aug. 7.41150 2 52 08.29 -51 41 42.2 Torres
27.35610 2 29 39.41 -55 43 28.4 "
27.37693 2 29 37.62 -55 43 41.5 "
Jan. 11.07594 23 17 51.38 -46 50 38.3 "
12.07628 23 17 55.43 -46 40 52.9 "
Oct. 13.45347 21 57 38.63 -39 58 27.4 18.5-19 Gilmore
13.52637 21 57 36.13 -39 58 01.4 "
C. Torres and S. Barros (Department of Astronomy, University of
Chile). Cerro El Roble Station; Maksutov astrograph. Measurer:
M. Wischnjewsky. Faint images on Aug. 27 and Jan. 11.
A. C. Gilmore (Carter Observatory). 41-cm Cassegrain reflector.
Measurer: Pamela M. Kilmartin. Images near plate limit.
The following orbital elements, by the undersigned, are from
49 observations 1972 Nov. 15 to 1974 Oct. 13; perturbations by all
nine planets were taken into account.
Epoch = 1972 Dec. 29.0 ET
T = 1972 Dec. 18.9448 ET Peri. = 267.2089
e = 0.999910 Node = 314.1872 1950.0
q = 4.860748 AU Incl. = 113.0852
1975 ET R. A. (1950) Decl. Delta r m2
Mar. 29 22 13.60 -26 01.9 8.529 7.832 20.1
Apr. 8 22 15.69 -25 37.2
18 22 17.22 -25 17.0 8.378 7.940 20.1
28 22 18.08 -25 01.6
May 8 22 18.22 -24 50.9 8.172 8.047 20.1
18 22 17.55 -24 44.9
28 22 16.00 -24 43.4 7.942 8.155 20.1
June 7 22 13.55 -24 45.8
17 22 10.19 -24 51.7 7.731 8.263 20.1
27 22 05.93 -25 00.0
July 7 22 00.84 -25 09.9 7.579 8.372 20.1
17 21 55.04 -25 20.2
27 21 48.68 -25 29.5 7.525 8.481 20.2
Aug. 6 21 41.98 -25 36.7
16 21 35.17 -25 40.9 7.595 8.590 20.2
26 21 28.48 -25 41.3
Sept. 5 21 22.16 -25 37.4 7.797 8.699 20.4
15 21 16.41 -25 29.2
25 21 11.39 -25 16.9 8.116 8.809 20.5
Oct. 5 21 07.22 -25 00.7
15 21 03.96 -24 41.1 8.522 8.918 20.7
25 21 01.64 -24 18.6
Nov. 4 21 00.22 -23 53.7 8.972 9.028 20.8
14 20 59.67 -23 26.9
24 20 59.90 -22 58.5 9.425 9.138 21.0
Dec. 4 21 00.83 -22 28.8
14 21 02.36 -21 58.2 9.838 9.248 21.1
m2 = 6.5 + 5 log Delta + 10 log r
COMET BENNETT (1974h)
Mr. C. Torres, Department of Astronomy, University of Chile,
sends the following approximate positions of faint nebulous images
some 5' by 15' in extent and oriented northwest to southeast. The
images were found on plates taken by J. Parra and himself with the
Maksutov astrograph at the Cerro El Roble Station.
1974 UT R. A. (1950) Decl.
Dec. 8.04957 20 58.5 -73 27
8.05929 20 59.2 -73 24
10.06723 21 53.4 -59 22
10.08147 21 53.6 -59 16
PERIODIC COMET FORBES (1974a)
Further precise positions have been reported as follows:
1975 UT R. A. (1950) Decl. m1 Observer
Apr. 22.39049 20 44 57.66 -23 09 20.0 Torres
24.36192 20 51 00.13 -22 52 23.6 "
25.34243 20 53 58.79 -22 43 49.2 "
June 14.94444 23 04 04.75 -13 46 05.8 13.3 Bruwer
14.95833 23 04 06.77 -13 45 57.2 "
C. Torres and S. Barros (Department of Astronomy, University of
Chile). Cerro El Roble Station. Measurer: M. Wischnjewsky.
Comet diffuse with central condensation and a tail 2' long.
J. A. Bruwer (South African Astronomical Observatory, Hartbeespoort
Annexe). Franklin-Adams camera.
1975 February 12 (2746) Brian G. Marsden
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