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IAUC 3170: 1978c; 1978b; Poss. OPTICAL COUNTERPART FOR GT 0236+610; V1500 Cyg

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IAUC number 

                                                  Circular No. 3170
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     Telex: 921428
Telephone: (617) 864-5758


COMET BRADFIELD (1978c)
     William A. Bradfield, Dernancourt, near Adelaide, reports the
discovery of a new comet.  The following observations are available:

     1978 UT          R. A. (1950) Decl.     m1     Observer
     Feb.  4.755     18 21.2     -49 56      8      Bradfield
           4.781     18 21.4     -49 55               "
           5.150     18 27.5     -49 20      7      Tregaskis

W. A. Bradfield (Dernancourt).  Comet diffuse with condensation.
T. B. Tregaskis (Mount Eliza, near Melbourne).  Comet diffuse with
   condensation.   Communicated by J. B. Trainor.


PERIODIC COMET WILD 2 (1978b)
     P. Wild, Astronomical Institute, Berne University, communicates
further precise positions as follows:

     1978 UT             R. A. (1950) Decl.
     Jan. 27.73750     5 18 03.06   +19 57 32.1
          27.75694     5 18 02.68   +19 57 36.6


POSSIBLE OPTICAL COUNTERPART FOR GT 0236+610
     N. Sanduleak, Warner and Swasey Observatory, notes that a
reddened eleventh-magnitude OB+ star (LSI +61 303) in Luminous Stars in
the Northern Milk Way 1 (1959) falls very close to the position
given for the variable radio source GI 0236+610 (IAUC 3164) and may
represent the optical counterpart (also for the gamma-ray source CG
135+1).  The star, not previously reported to show emission, is suspected
of showing H-alpha weakly in emission on an objective-prism plate
taken with the Burrell Schmidt telescope on 1975 Aug. 9.  An
identification chart is given by Brodskaya and Shajn (1958, Izv. Krimsk.
Astrofiz. Obs. 20, 299), who number the star +61 266.  UBV photometry
was obtained by Drilling (1975, Astron. J. 80, 128).


V1500 CYGNI
     Visual magnitude estimates: 1977 Aug. 16.07 UT, 12.8 (S.
O'Meara, Harvard Obs.); Sept. 22.1, 13.3 (O'Meara); Nov. 12.0, 13.8
(J. Bortle, Brooks Obs.); 1978 Jan. 3.0, 13.9 (Bortle).


1978 February 6                (3170)              Brian G. Marsden

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