COMMISSION 27 OF THE I. A. U.
       INFORMATION BULLETIN ON VARIABLE STARS
                   Number 2325

                                   Konkoly Observatory
                                   Budapest
                                   2 May 1983

                                   HU ISSN 0374 - 0676


          BD +37d443 : A NEW RED VARIABLE STAR


BD +37d443 was used as comparison star in the observations of the 
O-subdwarf BD +37d442 by Bartolini et al. (1982), who accidentally 
interchanged the identification of the two stars (Rebeirot, 1982).
  In 1977 BD +37d443 was much fainter than BD +37d442 and BD +37d446,
while according to the BD catalogue and for BD +37d442 also from the
AGK2 catalogue it was listed as being brighter.
  On January 6, 1983 BD +37d443 was observed photoelectrically with the
152 cm telescope of Bologna Observatory equipped with a five colour 
photometer described by Lolli (1983) and resulted as bright as in the BD map.
  The following differences of magnitude between BD +37.443d and BD +37d442 
(that according to Landolt (1973) and Bartolini et al. (1982) presents
variations not larger than 0.08m) have been obtained so far:

JD-2440000   DeltaV  DeltaB   Telescope
 3454.42      0.58    1.81      60 cm
 3458.48      0.63    1.77      60 cm
 3483.41      0.58    1.79      60 cm
 3495.37      0.55    1.75      60 cm
 5341.40     -0.29    1.10     152 cm


  The spectral type K 0 III published by Rebeirot (1970) suggests that
BD +37d443 could be a long period or a semiregular variable star.


                             M. LOLLI
                             L. OCULI
                             A. PICCIONI
                             R. SERRA

                          Dipartimento di Astronomia
                          Dell Universita di Bologna


References :
              
Bartolini, C., Bonifazi, A., D'Antona, F., Fusi Pecci, F., Oculi, L., 
   Piccioni, A.: 1982; Astrophys. Space Science 83, 287 [BIBCODE 1982Ap&SS..83..287B ]
Landolt, A.U.: 1973, Publ. Astron. Soc. Pacific 85, 661 [BIBCODE 1973PASP...85..661L ]
Lolli, M.: 1983, Thesis Bologna University
Rebeirot, E.: 1970, Astron. Astrophys. 4, 404 [BIBCODE 1970A&A.....4..404R ]
Rebeirot, E.: 1982, Astrophys. Space Science 88, 253 [BIBCODE 1982Ap&SS..88..253R ]