COMMISSION 27 OF THE I. A. U.
        INFORMATION BULLETIN ON VARIABLE STARS
                    Number 1885

                                  Konkoly Observatory
                                  Budapest
                                  1980 December 12

                                  HU ISSN 0374-0676



      REQUEST FOR CONFIRMATION OF A NEW DISCOVERED
            ECLIPSING BINARY (SAO 072799)



    On photographic observation of the BAV-program-star SW Lac
I noticed that one of the comparison stars (SAO 072799=BD+37d4713)
used in addition was getting weaker continuously about 0.4m within
3 hours.
    Three months later, on 18 January 1980 there was found a
second descent to minimum light.
    Since July 1980 I could get more than 400 exposures, but
only on one series of 05 October 1980at the first time, I could
observe a total minimum of this 8th mag. star.
    A secondary minimum was found on 28 September, with a depth
of about 0.2m and at P ~ 0.3. Especially it is remarkable that the
relatively very short "d" at the secondary minimum lasts only
about 0.6h in comparison with the primary's "d" of about 2h.
    But for more details, a comprehensive series in the next
three months should fill some gaps round about the total cycle,
especially at the ascending part of the light curve.
    For the moment I want to indicate the variability of
SAO 072799, in order to activate some professional photoelectric
observers.







                        PETER FRANK
                        Hauptstr. 4
                        D-8319 Velden/Vils
                        West-Germany