COMMISSIONS 27 AND 42 OF THE IAU 
             INFORMATION BULLETIN ON VARIABLE STARS 
                          Number 3732 
 
                                        Konkoly Observatory 
                                        Budapest 
                                        27 May 1992 
 
                                        HU ISSN 0374 - 0676 
 
 
 
 
              IS V410 CASSIOPEIAE A SYMBIOTIC STAR? 
 
 
 Variability of V410 Cas was discovered by Hoffmeister (1967), who 
pointed out that the star was bright in 1938-1939 (15.5m pg). 
Outside this time interval its brightness was 17.5m - 18m pg. 
 
 We studied this star on 409 photographic plates obtained with the 
40-cm astrograph (Crimean Laboratory of Sternberg Astronomical 
Institute), J.D. 2437912-48180 (1962-1990). 
 
 We found that until 1978 the star was fainter than 17.5m B, but after 
that it brightened to 15.5m B in 1-1.5 years, and remained 
approximately constant during 10 years except a depression (16m B) in 
1981-82 (eclipse?). This photometric behavior is typical of such 
symbiotic stars as V1329 Cyg, HM Sge, PU Vul and other similar 
objects. 


                          [FIGURE 1]

        Figure 1. Light curve of V410 Cas in 1962-1990
 
                          [FIGURE 2]

     Figure 2. The brightness increase of V410 Cas in 1981-1982


 It is significant that this particular star had two outbursts 
separated by 40 years. 
 
 According to the Palomar charts the star was about 18m pg in 1954, 
on both the blue- and the red-sensitive prints. For a reliable 
classification spectral observations are needed. 
 
 The light curve and details of the brightness increase are given in 
Figures 1 and 2 respectively. 
 
 
                         S. V. ANTIPIN, S. Yu. SHUGAROV 
                         Sternberg State Astronomical 
                         Institute, 119899 
                         Moscow, Russia 
 
 
 
Reference: 
 
Hoffmeister, C.: 1967, Astron. Nachr. 290, 43.  [BIBCODE 1967AN....290...43H ]