COMMISSION 27 OF THE I.A.U.
                 INFORMATION BULLETIN ON VARIABLE STARS
                              Number 2980

                                                         Konkoly Observatory
                                                         Budapest
                                                         4 February 1987

                                                         HU ISSN 0374 - 0676


          THE PROPER MOTION OF THE AGK3 VARIABLE STARS. III:
 
                              RX Peg

This is the third note on a program conducted to check the proper motion of the
AGK3 red variable stars which seem to be affected by systematic errors
(Stephenson 1978). On the previous notes, CR Gem = AGK3 +16 639 (Lopez 1986)
and SS Vir = AGK3 +1 1462 (Lopez and Cesco 1986) were discussed. The case of
RX Peg = AGK3 +22 2375 = BD +22d4508 = HD 208526 is herein presented.

   The first-epoch position is based on the published material of the Paris
Astrographic Catalogue (AC) where RX Peg was identified with object 148 on
plate 314 (zone +22 degrees and epoch 1892.75). The second-epoch position has
been obtained from a new plate (epoch 1986.50) taken with the Double Astrograph
of El Leoncito Station. Both plates were treated in the same way and reduced
using the surrounding AGK3 stars as a reference system. The mean error for
the AC plate is +-0".38 in alpha and +-0".33 in delta, whereas for the new position
it is +-0".26 in both alpha and delta.

   The resulting annual proper motion is:

mu alpha*cos(delta) = -0".007 +- 0".005 (me); mu delta = -0".002 +- 0".004 (me)

   The values quoted in the AGK3 are:

mu alpha = -0".033   and   mu delta = -0".270

   Our result is in agreement with Palmer's (1945) determination, thus
confirming that the values quoted in the AGK3 are in error.


                   CARLOS E. LOPEZ
                   JULIO E. TORRES

                  Obs. "Felix Aguilar"
                 Benavidez 8175 (oeste)
                5413 Chimbas - San Juan
                      Argentina



References:

Lopez, C.E. 1986. IAU Inf. Bull. Var. Stars No. 2864.
Lopez, C.E., Cesco, M.R. 1986. IAU Inf. Bull. Var. Stars No. 2940.
Palmer, F. 1945. Lund Medd. Ser. II No. 118.
Stephenson, C.B. 1978. Astron. J. 83, 816. [BIBCODE 1978AJ.....83..816S ]