COMMISSION 27 OF THE I. A. U.
          INFORMATION BULLETIN ON VARIABLE STARS
                      Number 3024


                                        Konkoly Observatory
                                        Budapest
                                        15 May 1987

                                        HU ISSN 0374-0676


     NEW BRIGHTENING OF SUGANO'S OBJECT IN ORION ASSOCIATION
  
  The fuorlike variation of the brightness of Sugano's object (alpha =
5h33m06.5s
(1900); delta = -4d20'11" (1900) ) was for the first time observed during 1982 -
1985 (Marsden 1983, Natsvlishvili 1984 ).
  The photographic magnitude of Sugano's object in minimum is about 18 mag.
  The duration of the flare was about three years. By the observations on
the 40" Schmidt telescope of Byurakan Observatory on 19 November 1983 the
following colour indices and amplitudes were found (Parsamian, Gasparian 1987):

   U-B   B-V    V          Delta mU     Delta mB        Delta mV

  -0.7   0.3   14.6        ~4.3         >=2.9          > 2.6


                            [FIGURE 1]


 The star demonstrated a rapid flare of amplitude delta mB ~/= 0.6 on our plates
taken on 12 September 1970. On the plates from 4 and 5 November 1986 a new
brightening of the star (U = 14.6; B = 15.09; U-B = -0.49) was observed.

 The light curve of Sugano's object is given in Fig. 1.




                          K.G. GASPARIAN
                          G.B. OGANIAN
                          E.S. PARSAMIAN

                        Byurakan Observatory,
                           Armenia, USSR




References:

Marsden, B.G., 1983, IAU Circ. No. 3763 [BIBCODE 1983IAUC.3763....2K ]
Natsvlishvili, R. Sh., 1984, Inf. Bull. Var. Stars No. 2565
Parsamian, E.S., Gasparian, K.G., 1987, Astrofisika, in press [BIBCODE 1987Afz....27..447P ]