COMMISSION 27 OF THE I. A. U.
           INFORMATION BULLETIN ON VARIABLE STARS
                        NUMBER 846

                                 Konkoly Observatory
                                 Budapest
                                 1973 November 20


      FORTY ECLIPSING BINARIES PROBABLY WITHIN 100 PS FROM
        THE SUN WITH UNKNOWN TRIGONOMETRIC PARALLAXES


     Dealing with the problem of distances of eclipsing binaries
the writer found that forty eclipsing variables with so far unknown 
trigonometric parallaxes are within 100 ps of the Sun. The
distances were found by using a new method of determination of
photometric parallaxes of eclipsing binaries. The general idea of
this new method is given in the writer's paper (Acta Cosmologica 2,
1973, in press).
     The data necessary for the computations of photometric parallaxes 
were taken from the following sources: Eggen (MN 84, No. 5,
1967) Koch, Plavec and Wood (Publ.Pennsylvania,Astr.Ser. X. 1970),
Kordylewski (Roczn.Astr.Obs.Krakow, 1973. Int.Suppl. 44. 1972),
Kukarkin et al. (GCVS 1969; First Suppl. 1971), Mauder (Astr.Aph. 17, 1)  
and Tschudovitschev (Kazan Bull. 28. 1952). The stars are listed in
the Table. The consecutive columns contain the name of the star, the
photometric parallax with its mean error.

Name			Name			Name			    Name
	pi_f	m.e.		pi_f     m.e.	          pi_f     m.e.		    pi_f      m.e.
    (0.001")	(0.001")	(0.001") (0.001")	  (0.001") (0.001")        (0.001") (0.001")
RT And   10     +/-2   	RW Dor 	35       +/-10	AM Leo      10 	     3	    SZ Psc   11       4
 S Ant   10        2   	BV Dra 	16   	     5 	TZ Lyr      13       2 	    UV Psc   12       6
OO Aql   10        2   	CM Dra 	16    	     4 	FL Lyr      11       2 	    TY Pyx   18       8
WW Aur   13        1   	YY Eri 	18   	     2 	TY Men      15       4 	    W Ser    13       3
HS Aur   11        5   	BZ Eri 	10   	     8 	V502 Oph    11       1 	    TY Tau   10       4
ZZ Boo   12        3   	 Z Her 	11   	     2	V566 Oph    13       2 	    CD Tau   15       2
WY Cnc   15        5   	AW Her 	12   	     2 	V839 Oph    12       4 	    XY UMa   11       4
EX Car   10        4   	GK Hya 	14   	     5 	V1010 Oph   12       3 	    AW UMa   13       2
RR Cen   11        1   	AR Lac 	19   	     3 	LX Per      17       8 	    AH Vir   11       2
V636 Cen 11        4   	XY Leo 	16   	     4  AE Phe      16       5 	    ER Vul   17       2

In my opinion, trigonometric parallaxes for these 40 stars should
be determined in the first term. This would allow to verify the 
calculated photometric parallaxes and, on the other hand, it would 
considerably amplify the material for further investigation of the 
physical properties of eclipsing systems.

Astronomical Observatory of the
Jagellonian University, Cracow 		T. ZBIGNIEW DWORAK