COMMISSION 27 OF THE I. A. U.
        INFORMATION BULLETIN ON VARIABLE STARS
                     NUMBER 127



                                       Konkoly Observatory
                                       Budapest
                                       18 March 1966



               NEW BRIGHT VARIABLE STAR



     Recently I discovered with Dr. Helmut Abt a new variable star
of visual magnitude 5.86. The star is HR 7484 (HD 185912, BD+54deg 2193,
Boss 5026, GC 27206), and has been known to be a double-line spectroscopic 
binary since Harper's work on it in 1919 (Ap. J. 51, 187, 1920).
Observations of the star with a photoelectrically equipped 16" reflecting
telescope on Kitt Peak revealed that the star is also an eclipsing binary
demonstrating two eclipses, which seem to be nearly the same depth,
some 0.2 magnitude.

     We have almost completed a new velocity curve obtained with
the Kitt Peak 84" telescope and coude spectrograph, and these modern
observations with those of Harper in 1919 have yielded a more accurate
period of 7.64074 days. The system seems to be a rather eccentric
one with the secondary eclipse occuring at phase 0.74, and both 
components are of spectral type F5V. The final orbital elements based on
our new velocity curve will be calculated when we have obtained a few
remaining observations.

     In addition we have almost completed a three-color UBV light
curve of the eclipses, which we hope to use with the velocity curve to
determine absolute dimensions of the system.


Kitt Peak National Observatory
March 11, 1966.
                                        MICHAEL S. SNOWDEN