COMMISSIONS 27 AND 42 OF THE IAU
             INFORMATION BULLETIN ON VARIABLE STARS
                          Number 4050


                                                Konkoly Observatory
                                                Budapest
                                                12 July 1994

                                                HU ISSN 0374 - 0676


                V800 Aql IS A CLASSICAL CEPHEID



 This star was investigated by several authors. Hoffmeister (1949) determined the
variable's type as U Gem (Z Cam) and variability range 14m-16mpg. Gotz (1955, 1956)
found limits 12.8m-15.7m and type RW Aur.
 The star was estimated by us on 109 photographic plates, taken from JD 2440763 to
47749. The finding chart and magnitudes of comparison stars are presented in Figure 1.
 Periodic variability of V800 Aql with a light curve typical for classical Cepheids was
found. Light elements for it are JD Max=2445221.26+20.065d x E and variability range is
14.4m-16.5m in B band. The light curve is given in Figure 2. The uncertainty of the value
of the period is +/-0.004d.
 The star is yellow on the Palomar atlas charts in agreement with the delta Cep 
type. The galactic coordinates according to GCVS IV are l=43.14d, b=3.79d.
 It is desirable to continue observations of this star.


                              [FIGURE 1]

               Figure 1. The finding chart of V800 Aql

                              [FIGURE 2]

  Figure 2. The mean light curve of V800 Aql. Uncertain observations are shown 
  as open circles.


 This work has been partly supported by Center for Cosmoparticle Physics "Cosmion".


                         S. V. ANTIPIN
                         S. Yu. SHUGAROV
                         Sternberg Astronomical Institute
                         119 899, Moscow, Russia



References:     
Gotz, W., 1955, Mitt. Ver. Sterne, No. 183
Gotz, W., 1956, Mitt. Sternw. Sonneberg, 2, No. 5
Hoffmeister, C., 1949, Astron. Abhandlungen, Erg. Astron. Nachr., 12, 1