COMMISSION 27 OF THE I.A.U.
                 INFORMATION BULLETIN ON VARIABLE STARS
                             Number 3273

                                                         Konkoly Observatory
                                                         Budapest
                                                         15 December 1988

                                                         HU ISSN 0374 - 0676


        THE FARTHEST KNOWN ECLIPSING BINARIES IN OUR GALAXY

This paper contains a list of 12 farthest eclipsing binaries known in our
Galaxy. These stars are selected from catalogues (Brancewicz and Dworak, 1980;
Kholopov et al., 1985, 1987) under the following conditions: distance modulus
m - M>13.0m so a parallax Pi<0.00025" (i.e. d>=4000 pc). Additionally the 
value
d * sin|b| was calculated where b is a galactic latitude for a given star.
   The consecutive columns of the Table I contain: name of star, coordinates
alpha and delta for the epoch 1950.0, period in days, magnitude (photographic p,
photoelectric V or B), distance d in parsecs, distance from the galactic plane
d x sin|b| in parsecs.
   As we can notice, seven stars are placed in the galactic plane (d * sin|b|<
1000 pc) and only five stars can belong to the galactic halo. Further 
observations (astrometric and spectrometric) are necessary to confirm this 
hypothesis which can be very useful in the investigations of kinematics of our
Galaxy


                             Table I

       The list of the farthest eclipsing binaries in our Galaxy

Name          RA  (1950)  Dec.       Period       Mag.       d      d sin |b|
                                                            [pc]      [pc]

BO And     22h56m23s   +45d15'7      5d79733      13.4m p   6700      2300
UX CVn     12 12 16    +36 56        0.573703     13.07V    6700      6500
FP Car     11 02 33    -62 18.3    176.027        10.1 B    5000       200
UU Cas     23 48 11    +60 38.0      8.51929      10.4 p    5000       100
AQ Cas     01 15 50    +62 07.0     11.72115      10.06V    5000        30
V366 Cas   01 05 15    +58 26        0.729274     12.0 p    4000       300
V814 Cen   13 24 44    -47 10.6      1.168129     14.1 V    6900      1800
W Cru      12 09 20    -58 30.3    198.53          9.04B    5000       300
V698 Cyg   19 58 02    +36 08.4     97.7732       12.2 p    5000       300
HP Lyr     19 19 58    +39 50.4    140.75         10.5 p   10000      2000
V471 Per   01 55 33    +52 39.3      0.16668      13.03V   38000      5700
RY Sct     18 22 43    -12 43.2     11.12471       9.12     5000        10

   It is possible that the star V381 Sco is also very distant one (its
d ~10000 pc) but it is in the region of galactic centre. Moreover, the data
for V381 Sco are uncertain (Brancewicz and Dworak, 1980).
   All the data for computations are taken from following sources: Brancewicz
and Dworak (1980), Dworak (1975, 1976, 1983), Kholopov et al. (1985, 1987).



                 M. BANACZKOWSKI
                  T. Z. DWORAK

                Faculty of Geodesy
             University of Mining and
             Metallurgy, Cracow, Poland
                      and
             Observatoire Astronomique
               de Bordeaux, France



References:

Brancewicz, H.K., Dworak, T.Z., 1980, Acta Astr., 30, 501. [BIBCODE 1980AcA....30..501B ]
Dworak, T.Z., 1975, Acta Astr., 25, 383. [BIBCODE 1975AcA....25..383D ]
Dworak, T.Z., 1976, Post. Astromii, T. XXIV, 201. [BIBCODE 1976PoAst..24..201D ]
Dworak, T.Z., 1983, Post. Astromii, T. XXXI, 53. [BIBCODE 1983PoAst..31...53D ]
Kholopov et al., 1985, G.C.V.S., The Fourth Edition, vol. 1 and 2.
Kholopov et al., 1987, G.C.V.S., The Fourth Edition, vol. 3, "Nauka", Moscow.