COMMISSION 27 OF THE I. A. U.
          INFORMATION BULLETIN ON VARIABLE STARS
                       Number 3336

                                          Konkoly Observatory
                                          Budapest
                                          12 June 1989

                                          HU ISSN 0374 - 0676


               A New Variable Star in Phoenix ^1


In an observational program of the star SX Phe, SAO 231769 was used as
comparison star and SAO 231800 (HD 223480) as check star. The observing run
was carried out during October and November 1988 with the 50 cm Danish
telescope in the European Southern Observatory (La Silla, Chile) by using the
simultaneous uvby beta Stromgren photometer attached to this telescope. SX Phe
and SAO 231769 was observed during six nights, but SAO 231800 only three ones,
on the nights of October 30/31 and November 1/2 and 3/4, logging a total of 15
hours approximately. The observations showed that while SAO 231769 kept a
constant brightness, SAO 231800 presented a slight photometric variability.
This last star is not present in any of the variable stars catalogues, hence it
has to be considered as a new variable star.


                              [FIGURE 1]


Figure 1 shows the light curve in the b filter in the night 3/4 of November.
The magnitudes are differences SAO 231800 - SAO 231769 in the standard system.
From figure it can be seen that the period is about 0.063 days and the
amplitude of the variation of luminosity is 0.02m approximately, and on the
other hand, the spectral type of this star is F0. Hence, due to the
characteristics shown, we might conclude that this star is probably a delta
Scuti type variable.

A more detailed study of this star will be published later.


E. RODRIGUEZ
A. ROLLAND
P. LOPEZ DE COCA
Instituto de Astrofisica de Andalucia
Apdo. 2144, Granada, Spain

^1 Based on observations collected at European Southern Observatory, La Silla,
Chile