COMMISSION 27 OF THE I. A. U.
       INFORMATION BULLETIN ON VARIABLE STARS
                    NUMBER 429

                                 Konkoly Observatory
                                 Budapest
                                 1970 April

                 NOVA SERPENTIS

      The photoelectric photometry of Nova Serpentis was
carried out at Okayama and Dodaira Stations, and the preliminary 
results for the period earlier than 18th February
have already been reported in the IAU Circular. In the
present report the summary of the results in about one
month after the nova outburst is presented.


           Table 1. Photometry of Nova Serpentis

 1970      V      B-V     U-B  Telescopes Observers Notes
  UT                             
 Feb.
   16.86   4.88 +0.84    +0.33     91       I, S     1
   17.84   4.58   .96      .53     30       W        1
   18.83   4.7:  1.2:      .7:     30       W        2,3
   19.84   4.59  1.04      .55     30       W        2
   28.83   4.99   .75     -.10     30       W        2
 Mar.
    4.78   5.44   .71     -.18     30       W        2
    4.81   5.35   .67     -.20   D 91       Ns       1
    5.80   5.46   .72     -.22     30       W        2
    5.83   5.48   .72     -.24   D 91       Ns       1
    6.82   5.32   .69     -.28   D 91       Ns       1
    6.83   5.32   .71     -.24     30       Ng, W    2
    7.82   5.54   .74     -.31   D 91       Ns       1
    8.84   5.50   .70     -.33   D 91       Ns       1
   18.81   5.74   .66     -.38     91       I        2
   18.81   5.76   .97     -.39     30       W, Nk    2
   19.82   6.06   .66     -.41     30       W        2
   20.82   5.95   .66     -.43   D 91       K        2
   22.77   5.85   .71     -.42     91       Ng, I    1

Telescopes: 91 and 30 are for the 91 cm and 30 cm reflectors
of the Okayama Stations respectively, D 91 is for
the 91 cm reflector of the Dodaira Station.
Observers: I: K.Ichimura,   K: M.Kiyokawa,     Ng: T.Noguchi,
Nk: M.Nakagiri,             Ns: S.Nishimura,   S: M.Shimizu,
W: E.Watanabe.
Notes: 1. Comparison with  H.L.Johnson's photometric standards
2, Repeated comparison with 74 Oph in 30-90 minutes.
V=4.84, B-V=+0.91, U-B=+0.63(B.Iriarte et al.:
Sky and Telescope, 30, 21,1965) was assumed for
74 Oph.
3. Values uncertain because of thin clouds.
Tokyo Astronomical Observatory,
                                               K.OSAWA