COMMISSION 27 OF THE I. A. U.
        INFORMATION BULLETIN ON VARIABLE STARS
                     NUMBER 629

                                      Konkoly Observatory
                                      Budapest
                                      1972 February 17


           ON THE SPECTRAL TYPE OF DI PEGASI


For the past 35 years the eclipsing binary DI Pegasi (+14deg5006=114.1934 Peg)
has been generally assigned a spectral type of K0, the object being considered
to be identical with HD 220619 (Morgenroth Astr. Nachr. 252, 389, 1934).
However, these stars are clearly not the same: HD 220619 is in fact BD
+4deg5006 rather than +14deg5006. Thus there is no basic for the assumed
spectral type. In the AGK2 the type of DI Pegasi is listed as F5, but
unfortunately the source of this type and its reliability are not known to the
writer.



WILLIAM P. BIDELMAN
Warner and Swasey Observatory of
Case Western Reserve University
1975 Taylor Rd., E. Cleveland, Ohio