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IAUC 3930: SN IN MCG 3-22-14; 1983n; 1983v; SU Tau; Corrs

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IAUC number

                                                  Circular No. 3930
Central Bureau for Astronomical Telegrams
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
TWX 710-320-6842 ASTROGRAM CAM    Telephone 617-495-7244/7440/7444

     E. P. Aksenov, Sternberg Astronomical Institute, reports that
Tsvetkov has discovered at the Sternberg Crimean Station a supernova
5" west and 19" north of the nucleus of MCG 3-22-14 (R.A. =
8h25m7, Decl. = +17deg37', equinox 1950.0).  Photographic magnitudes:
Jan. 5.99 UT, 16.7; 13.05, 16.6; Feb. 1.91, 16.9.

     Total visual magnitude estimates: Mar. 14.13 UT, 8.3 (R.
Keen, Boulder, CO, 0.32-m reflector); 20.17, 8.2 (C. S. Morris,
Whitaker Peak, CA, 20 x 80 binoculars); 23.16, 8.6 (Morris).

     A. Evans, University of Keele; J. Zarnecki, University of
Kent; and T. Morley, Europe Space Operations Center, have suggested
that, as seen from IUE, P/Crommelin will pass within 1" of
SAO 150943 on Apr. 7.3169 UT, yielding the possibility of measuring
extinction by cometary dust.  The corresponding geocentric
closest approach is 14"5 on Apr. 7.3172.  Those interested in
making complementary ground-based observations are invited to
contact Evans at telex (U.K.) 36113 UNKLIB G.  [The above prediction
was evidently made from the elements on IAUC 3886.  Recent
observations indicate a correction Delta-T ~ +0.0025 day and a
geocentric closest approach of ~ 20" to the star.]

     Total visual magnitude estimate by C. S. Morris (Angeles
Crest Highway, CA, 0.25-m reflector): Mar. 11.54 UT, 9.5.

     Visual magnitude estimates by C. E. Spratt, Victoria, BC:
1983 Dec. 4.25 UT, 9.7; 28.24, 9.6.

IAUC 3919.  GX 1-4.  On line 3, delete H-gamma.
IAUC 3921.  Periodic Comet Crommelin (1983n).  On line 6 from
   foot, add CN.
IAUC 3927.  Periodic Comet Wild 2 (1983s).  On line 3, for 96
   read 84.

1984 March 26                  (3930)              Brian G. Marsden

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