COMMISSION 27 OF THE I. A. U.
         INFORMATION BULLETIN ON VARIABLE STARS
                     Number 2850

                                     Konkoly Observatory
                                     Budapest
                                     20 January 1986

                                     HU ISSN 0374 - 0676




       PHOTOELECTRIC TIMES OF MINIMUM LIGHT OF BL ERIDANI



   The first photoelectric observations of BL Eridani ( = HV 6227)
were obtained in December 1980 and January 1981 with the 0.6-m telescope
at Cerro Tololo Inter-American Observatory in Chile. Differential
measurements made on five nights in B and V resulted in 520 individual
observations in each bandpass. Each observation is the average of two
ten-second integrations.
   The times of minimum light shown in Table I were determined by an
iterative process using the method of Hertzsprung (1928). Visual times
of minimum light were previously published by Locher (1978a, 1978b,
1978c).
   The O-C values in Table I were computed from the following
ephemeris:

      Min I (Hel. J.D.) = 2444606.5914 + 0.41696010 E
                               +-.0085  +-.00001013 (p.e.)

which was derived by a least squares analysis utilizing all the
available data. The epochs of minimum light were weighted 10 to 1,
photoelectric to visual.
   The observations, period study, and analyses of the light curves
are being published separately.


       Table I. Times of minimum light for BL Eri


      HEL. J.D.             MIN       EPOCH     O-C       FILTER


      2444603.67091          I        -7.0     0.0018      B,V
      2444604.71459         II        -4.5     0.0005      B,V
      2444606.58936          I         0.0     0.0021      B,V
      2444607.63275         II         2.5     0.0011      B,V



                          
                    J. R. KERN* and BEVERLY B. BOOKMYER
                    Dept. of Physics and Astronomy
                    Clemson University
                    Clemson, SC 29631, U.S.A.

                    
                    *Present Address:
                     Dept. of Physics
                     Rochester Institute of Technology
                     Rochester, NY 14623, U.S.A.

References:


Hertzsprung, E., 1928, Bull. Astr. Inst. Netherlands 4, 179. [BIBCODE 1928BAN.....4..172H ]
Locher, K., 1978a, BBSAG Bull. 36, 4.
Locher, K., 1978b, BBSAG Bull. 38, 3.
Locher, K., 1978c, BBSAG Bull. 39, 4.