COMMISSION 27 OF THE I. A. U.
        INFORMATION BULLETIN ON VARIABLE STARS
                     NUMBER 571

                                Konkoly Observatory
                                Budapest
                                1971 July 30

ABOUT THE VARIABILITY OF THE ECLIPSING VARIABLE STAR NQ Her

     The eclipsing variable star NQ Her (HD 166801; 8.0m;
A0) was observed in 1965 from May to July, for 10 nights in
the u light, 10 nights in b and 16 nights in v light, The
observations were carried out at the stellar station of the
Catania Astrophysical Observatory with a 30 cm Cassegrain
reflector. The telescope was equipped with an EMI 6256
photomultiplier and with the Schott filters u (UG12, 1mm);
b (BG12, 1mm + GG13, 2mm) and v (GG14, 2mm),
     HD 165507 (8.5m; A0) and HD 166157 (7.9m; A0) were
used as comparison and check star respectively, During the
observing period the magnitude difference between comparison
and check star did not show any significant variation.


                    [FIGURE 1]

  Fig. 1 u,b and v normal points of m_v-m_c, for each
       night of observations plotted versus J.D.

                    [FIGURE 2]

  Fig. 2  u, b and v light curves of NQ Her. The phases are
        computed according to the elements J.D.2426894.433+
        +0.870218d E

   In figure 1 u, b and v normal points of NQ Her, as
mean values of each observing night are plotted versus
J.D. date. In figure 2 the observations in u, b and v light
are plotted versus phase, which was computed according to
the elements  (Kukarkin et al, 1958).

   J.D. 2426894.433+ 0.870218d E

   From these figures it is evident that NQ Her did
not show any variability either with period P = 0.870218 or
with the period P = 20.815d (Sanding 1948). This agrees with
the results obtained by Rossati (1964) in v light during
1963 and by Popovici, (1971), still in v light) for the
observational period April-September 1968.
   The individual observations (m_v-m_c) versus J.D. will
be sent to the I.A.U. Comm. 27 depository of observations on
variable stars c/o Dr. W.S. Fitch, Steward Observatory, University 
of Arizona, Tucson, Arizona 85721, U.S.A.


Observatorio Astrofisico                 CARLO BLANCO
Catania - Italia

July 24, 1971

References
Kukarkin, V., Parenago, P.P.,  Efremov, Iu.I., Kholopov, P.N,
  1958, General Catalogue of Variable Stars, Astr.Council
  Ac. Sci. USSR, 1.
Popovici, C. 1971, Comm.27 IAU, Inf.Bull.Var.Stars. No. 509.
Rossati, F. 1964, Mem.Soc.Astr.Ital., 35, 81. [BIBCODE 1964MmSAI..35...81R ]
Sanding, H. 1948, Astr.Nachr., 276, 173 [BIBCODE 1948AN....276..173S ]