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IAUC 4024: SNe; N Vul 1984 No. 2; NGC 2346

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                                                  Circular No. 4024
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

     P. Wild, Astronomical Institute, Berne, reports his discovery
of a probable supernova 2" west and 12" north of the center of a
14.6-magnitude anonymous galaxy, with the position of the supernova
given as R.A. = 11h29m35s00, Decl. = +54deg10'59"2 (equinox 1950.0).  The
object was at mag 16.8 on Dec. 23.1 UT, with a very faint,
uncertain trace possibly present already on a Nov. 29 photograph.

   J. Maza, Department of Astronomy, University of Chile, telexes
the discovery by M. Wischnjewsky, on a plate taken by L. Gonzalez,
of a possible supernova in NGC 3336, 2" east and 8" north of the
galaxy's center, with the position of the possible supernova given
as R.A. = 10h37m55s53, Decl. = -27deg30'47"9 (equinox 1950.0).  On Dec. 20,
the object was at mv = 15.0.

     M. Burton, University of Edinburgh; and A. Longmore and H.
Zinnecker, Royal Observatory, Edinburgh, telex the following infrared
magnitudes obtained with the U.K. 3.8-m Infrared Telescope on
Dec. 23.18 UT: J = 4.59, H = 4.39, K = 4.26, L = 4.12, L' = 4.08,
M = 4.05; the colors correspond closely to those of a blackbody at
5400 K.

     A. R. Klemola, Lick Observatory, communicates the following
precise position, measured from a plate taken (epoch 1984.97) with
the 0.51-m astrograph: R.A. = 20h24m40s528, Decl. = +27deg40'48"18
(equinox 1950.0).

    Selected visual magnitude estimates, some via S. Nakano, Tokyo,
and some via J. Mattei, AAVSO: Dec. 23.96, about 5.5 (R. Hess, Ashland,
NH; independent discovery); 24.12, 5.9 (J. Morgan, Prescott, AZ);
24.78, 5.7 (K. Medway, Southampton, England); 25.389, 5.1, T. Yusa
(Sendai Obs.); 25.431, 5.5 (Yusa); 25.979, 5.7 (S. O'Meara,
Cambridge, MA); 26.013, 5.9 (D. W. E. Green, Cambridge, MA); 26.417,
5.8 (H. Takahashi, Saitama-Ken, Japan); 26.958, 5.6 (O'Meara).

NGC 2346
     Visual magnitude estimates of the central star in the planetary
nebula NGC 2346 (cf. IAUC 3667, 3736): Nov. 27.95 UT, 12.0
(Verdenet); Dec. 4.5, [13.1 (T. Langhans, Bruno, CA); 13.45, 12.1
(Langhans); 14.44, 12.1 (Langhans).

1984 December 28               (4024)            Daniel W. E. Green

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