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IAUC 3764: N Mus 1983; Poss. SN IN ESO 323-G25; OJ 287; 1982f

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IAUC number 

                                                  Circular No. 3764
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


NOVA MUSCAE 1983
     W. Liller, Vina del Mar, Chile, reports his discovery with
PROBLICOM of a possible nova at R.A. = 11h49m5, Decl. = -66deg55'
(equinox 1950.0).  Confirmation has been obtained from M. D. Overbeek,
Edenvale, South Africa, who notes that the object is very red.
Visual magnitude estimates are: Jan. 18.14 UT, 7.2 (Liller);
19.15, 7.3 (Liller); 19.86, 7.5 (Overbeek).


POSSIBLE SUPERNOVA IN ESO 323-G25
     J. Maza, Department of Astronomy, University of Chile, telexes
that M. Wischnjewsky has discovered a possible supernova in
this Sc galaxy on a plate taken by L. E. Gonzalez and Maza on Jan.
13.29 UT.  The object, of photographic magnitude 17.5, is at R.A. =
12h49m51s97, Decl. = -38deg45'40".6 (equinox 1950.0), 15" west and 15"
south of the nucleus of the galaxy.


OJ 287
     S. Haarala, T. Korhonen, A. Sillanpaa and E. Salonen, Turku
University Observatory, telex that the BL-Lac object OJ 287 (R.A. =
8h52m0, Decl. = +20deg14', equinox 1950.0) has undergone an outburst.
UBV photometry on Jan. 10.21 UT gave V = 12.92, B-V = +0.41, U-B
= -0.41.  There is also evidence of a radio outburst at 22 GHz
observed on Jan. 14.


PERIODIC COMET CHURYUMOV-GERASIMENKO (1982f)
     This comet continues to have been unexpectedly bright (cf.
the ephemerides on IAUC 3731 and MPC 6535).  Further total visual
magnitude estimates are: 1982 Dec. 10.18 UT, 9.5 (C. E. Spratt,
Victoria, BC, 0.20-m reflector); 13.83, 9.4 (J.-C. Merlin, Le
Creusot, France, 0.26-m reflector); 24.42, 9 (A. Hale, Palomar
Mt., CA, 10 x 50 binoculars); 26.48 UT, 9 (Hale, Mt. Laguna, CA).
Using an 0.20-m reflector, Hale noted on Dec. 24 a main curved
tail, ~ 20' long, in p.a. 250, and there was a shorter anti-tail
in p.a. 120.  The main tail (15' long in p.a. 270) was again
observed and the anti-tail suspected on Dec. 26, and a straight
streamer was seen in p.a. 300.


1983 January 20                (3764)              Brian G. Marsden

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