COMMISSION 27 OF THE I. A. U.
          INFORMATION BULLETIN ON VARIABLE STARS
                       Number 2578

                                          Konkoly Observatory
                                          Budapest
                                          4 September 1984

                                          HU ISSN 0374-0676


          PHOTOGRAPHIC AND PHOTOELECTRIC OBSERVATIONS
             OF NOVA VULPECULAE 1984 NEAR MAXIMUM

  The brightness of Nova Vul 1984 was estimated on plates of the Sonneberg
Sky Patrol taken by H. Huth. On 29 and 30 July the brightness was about that
of SAO 87162. The result is somewhat uncertain because of the bad position
of the Nova on the plates. The brightness of SAO 87162 (V=8.94, B-V=0.14)
was linked with the 60 cm-I-telescope at Sonneberg, on August 12, photoelectrically 
to SAO 87213 whose international UBV values are given by Blanco
(Photoelectric Catalogue, 1970); all the other brightness differences determined 
photoelectrically are also relative to SAO 87213. During all the nights
the difference between SAO 87211 and SAO 87213 was found to be constant within 
the observational error. 16 sec integrations and symmetric measurements
were made. The weather conditions were sometimes very poor.

                      Table I
              Photographic observations
1984          J.D.- 2445900     m(pg)       Field 20deg
 
July 25.972       07.472        >13.5m       19h,20h
     29.922       11.422          9.2          19
     29.963       11.463          9.2          20
     30.917       12.417          9.2          20
     30.917       12.417          8.9          19

                            Table II
                      Photoelectric results
1984      J.D.- 2445900           V                 B-V            U-B
July 30   12           .358d     8.62m    .362d     .48m   .370d  -.64m
          12           .421      8.56     .415      .46    .406   -.62
31        13           .375      7.75     .379      .44    .386   -.55
          13           .419      7.74     .422      .45:
Aug.03    16           .378      7.12     .382      .52    .390   -.39 
    12    25           .360      8.06     .364      .46    .374   -.74 
    12    25           .443      8.06     .445      .43

(in front of the brightness value the fraction of the Julian day is given)
Typical errors of the given mean values are 7, 10, 10 mmag for V, B-V and
U-B, respectively.
  The comparison of the photographic and photoelectric values on July 30
gives a good agreement despite the bad position of the Nova on the plates.


                            R.H. SCHULT
                        Sternwarte Sonneberg
                  Zentralinstitut fur Astrophysik
                  der Akademie der Wissenschaften
                             der DDR