Central Bureau for Astronomical Telegrams
IAUC 3851: 1983n
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Circular No. 3851
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
TWX 710-320-6842 ASTROGRAM CAM Telephone 617-864-5758
PERIODIC COMET CROMMELIN (1983n)
Independent reports of the recovery of this comet have been
received from S. Wyckoff and P. A. Wehinger, Arizona State University,
and from L. Kohoutek, Hamburg Observatory, as shown below:
1983 UT R.A. (1950.0) Decl. m2 Observer
Aug. 9.00764 20 41 30.3 +23 32 20 20 Kohoutek
9.03608 20 41 28.2 +23 32 23 "
10.00347 20 40 14.9 +23 33 35 "
13.48938 20 35 46.57 +23 35 22.9 Wyckoff
L. Kohoutek (German-Spanish Astronomical Center, Calar Alto).
0.8-m Hamburg Schmidt. Object of stellar appearance very near
plate limit. Positions semiaccurate.
S. Wyckoff and P. A. Wehinger (Kitt Peak National Observatory).
No. 1 0.9-m reflector and CCD camera. The above accurate position
is from a 3-min exposure with an R filter, one of several
images recorded in V and R during a 3-hr interval. The comet
is not obviously of other than stellar appearance. Photometric
observations yield V = 19.66 +/- 0.06, V-R = +0.57 +/- 0.01.
The comet's position is in close agreement with the predicted
elements by B. G. Marsden on MPC 7454 (indicated correction Delta-T =
-0.04 day), but the comet is much brighter than anticipated on MPC
7846. In the following ephemeris the magnitude has been adjusted:
1983 ET R.A. (1950.0) Decl. p r m1
July 25 20 58.80 +22 38.9 2.311 3.123 20.7
Aug. 4 20 47.64 +23 21.2
14 20 35.09 +23 34.9 2.061 2.905 20.3
24 20 22.08 +23 16.7
Sept. 3 20 09.67 +22 26.6 1.905 2.681 20.0
13 19 58.95 +21 08.6
23 19 50.81 +19 30.0 1.828 2.449 19.9
Oct. 3 19 45.79 +17 39.0
13 19 44.20 +15 43.9 1.797 2.208 19.8
23 19 46.11 +13 51.6
Nov. 2 19 51.45 +12 07.1 1.775 1.959 19.6
12 20 00.13 +10 33.9
22 20 12.08 + 9 14.2 1.730 1.701 19.3
Dec. 2 20 27.28 + 8 08.9
12 20 45.82 + 7 18.0 1.640 1.437 19.0
1983 August 17 (3851) Brian G. Marsden
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