COMMISSION 27 OF THE I. A. U.
          INFORMATION BULLETIN ON VARIABLE STARS
                      Number 3098

                                         Konkoly Observatory
                                         Budapest
                                         13 October 1987

                                         HU ISSN 0374 - 0676



                  BD +43 3749 RECOVERED


In his Bonner Durchmusterung Argelander noted a 9.5 magnitude star
as +43 3749. There is, however, no such star at the given position,
but the place is instead occupied by the much fainter (mpg = 16.0)
emission-line star LkHalpha 172 (Herbig 1958) = UHalpha 45 (Welin 1973).
Herbig notes that a 1954 spectrum shows the star to be of intermediate
to late G type, with rather strong Hbeta  emission, possibly also H-gamma
emission, but no emission at H and K. Possibly the strength of H-alpha
emission was weaker during Welin's later survey; emission strengths
are given as medium and weak, respectively.

 The star was also of mpg about 16 when plates were taken by Wolf
in 1901 (Wolf 1925) and 1905 (Palisa and Wolf 1931). It would be
extremely interesting to know if Argelander just happened to observe
a transient outburst in the star, or whether the star actually did
fade by some five magnitudes from the mid-19th century to the beginning 
of the 20th. Perhaps it might be found on old plates in some
observatory archives.


                         GUNNAR WELIN
                         Astronomical observatory
                         Uppsala, Sweden




References:

Herbig, G.H. 1958, Astrophys. Journal 128, 259 [BIBCODE 1958ApJ...128..259H ]
Palisa, J. and Wolf, M. 1931, Photographische Sternkarten, Vol. X,
            Blatt 198, Wien
Welin, G. 1973, Astron. Astrophys. Suppl. 9, 183 [BIBCODE 1973A&AS....9..183W ]
Wolf, M. 1925, Die Milchstrasse und die kosmischen Nebel,
            Bild 12, Potsdam