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

                     Number 447

                                Konkoly Observatory
                                Budapest
                                1970 July 10




          LIGHT VARIATIONS OF BD +39 2193

In the process of obtaining photometry for 173 program
stars, light variation was detected for BD  + 39 293 =
= HD 77443. Presented below are the magnitudes and colors
for BD + 39 2193 with the heliocentric Julian Day for the
V magnitude.

The  average deviation for the five V observations listed
was 0m047, whereas, the average deviation of the V observations  
for the program stars was 0m009. The observations
presented here have a range of 0.175 magnitude in the
V, 0.214 in B, and 0.160 in U.

The HD catalog gives the spectral type of BD + 39 2193 as Mb,
similar to that of Rho Persei. Rho Persei is a known SRb
type variable, a designation given to semi-regular variables
of late spectral types. These stars are giants with typical
brightness variations of 0.7 magnitude.





                        R.L. WALKER
                        U.S. Naval Observatory
                        Flagstaff Station
                        Flagstaff, Arizona, U.S.A.

        HJD                      V.         B-V       U-B
    
    244 0565.010                6.709      1.549     1.344
    244 0567.989                6.777      1.548     1.321
    244 0666.762                5.602      1.509     1.375
    244 0682.686                6.745      1.471     1.308
    244 0683.730                6.740      1.473     1.302