COMMISSION 27 OF THE I. A. U.
       INFORMATION BULLETIN ON VARIABLE STARS
                    NUMBER 306


                                Konkoly Observatory
                                Budapest
                                1968 October 30



		NOVA VULPECULAE


  A series of photo-electric observations in B and V
has been made from April to September 1968 with a photometer
attached to the 50 cm reflector of ITA Observatory.
  Several stars were used for comparison; the V
magnitudes were taken from various sources and then
adjusted to fit the observed magnitude differences. 
Differential atmospheric extinction was always taken into 
account, although the corrections were generally small. These
adjusted values, shown in table 1, were actually used to
derive the V magnitudes of the nova. SAO 87734 and 87733
were observed on all nights, the others only occasionally.
Thus, the relative values of the present V observations
are quite accurate, but they may be systematically too high
or too low by as much as 0.1m due to the uncertainty in
the adopted magnitudes for the comparison stars.
  The color-indices B-V were obtained directly, not
via comparison stars. Very serious difficulties were 
encountered in correcting for atmospheric extinction since
most observations were made at high zenith distances and
under bad weather conditions. The B-V values may be in
error by as much as 0.1m.
  All magnitudes and color indices were transformed
from the instrumental into the standard UBV system. Since
the instrumental system is well matched, only small 
corrections had to be applied and it is believed, that no
significant error was introduced in this step.
Table 2 gives the final results.

Table 1:
Adopted values for the V magnitudes of the comparison stars.

Star               V     Star            V
(SAO number)             (SAO number)
87734             7.55   87633          5.43
87733             6.85   87883          4.53
87785             6.44   87840          5.52
87766             6.92


Table 2:
       Observed V magnitudes and color indices.

  JD        V     B-V           JD       V        B-V
2439900+                      2440000+
75.726     5.84   0.57          5.708   7.67      0.50
79.698     5.78   0.54         11.670   7.84      0.43
96.680     7.25   0.51         35.649   8.61      0.24
97.677     7.27   0.52         37.660   8.67      0.24
                              106.635  10.15      0.00

The ITA Astronomical Observatory
Sao Jose dos Campos, SP, Brazil

                            G.R. QUAST




                    RED VARIABLE IN LUPUS

      This star, alpha = 15h03m.0, delta = -41deg17', was announced
in IAU Circ, no.2090. Two photo-electric observations in B
and V were made:

               JD             V              B-V
          2440083.413        8.31            2.17
          2440106.414        8.76            2.38

      Together with the variable, also the stars below
were observed:

Star                            V        B-V
alpha=15h03m.1; delta=41deg21'  9.83     1.66
SAO 225473                      8.28     1.21
SAO 225481                      8.22     0.97
SAO 225422
(=HD 133220)                    6.68     1.64

      Only later it was found that SAO 225422 is also
variable, as indicated in Royal Observatory Bulletin Nr 121;
it was observed on JD 2440106.414. All the V magnitudes
listed above may be systematically in error by as much as
0.2m, since no reliable values could be found in catalogs;
but the magnitude differences should be correct to within
0.04m.

The ITA Astronomical Observatory
Sao Jose dos Campos, SP, Brasil                G.R. QUAST