COMMISSION 27 OF THE I.A.U.
              INFORMATION BULLETIN ON VARIABLE STARS
                           Number 2940

                                                 Konkoly Observatory
                                                 Budapest
                                                 6 October 1986

                                                 HU ISSN 0374 - 0676

     THE PROPER MOTION OF THE AGK3 VARIABLE STARS. II.
                           SS Vir

This is the second note on a program conducted to check
the proper motion of the AGK3 variable stars which seem to
be affected by systematic errors. In note I (Lopez, 1986),
CR Gem (AGK3 +16 639) was discussed. The case of SS Vir =
AGK3 +1d1462 = BD +1d2694 = HD 108105 is herein presented.
   The first-epoch position is based on the published
material of the Algier Astrographic Catalogue (AC) where
SS Vir was identified with object 41 on plate 2053 (zone +1
epoch 1909.25). 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".20 in RA and +-0".25 in Dec., while for the second-epoch it
is +-0".28 in RA and +-0".26 in Dec.

   The resulting annual proper motion is:


mu alpha*cos(Dec.) = 0".000 +- 0".004 (me) , mu delta = -0".002 +- 0".005 (me)

   The values quoted in the AGK3 are: mu alpha = -0".176, mu delta = -0".137.


                      CARLOS E. LOPEZ
                       MARIO R. CESCO
                  Observatorio "Felix Aguilar"
                    Benavidez 8175 (oeste)
                   5413 Chimbas - San Juan
                        Argentina.



Reference:

Lopez, C.E.: 1986. IAU Inf. Bull. Var. Stars No. 2864