COMMISSION 27 OF THE  I. A. U.
           INFORMATION BULLETIN ON VARIABLE STARS
			NUMBER 818
						Konkoly Observatory
						Budapest
						1973 August 12

			X TRIANGULI

      Three-colour photoelectric observations of the star X Tri in
the system close to U, B, V have been carried out by means of the
telescope A3T-14 during 1969/1972.
      Five individual photoelectric minima have been obtained on the
basis of our observations:

     J.D.                E             O-C                 n
2440535.3780         	3050         -0.0129               28
    538.2918       	3053         -0.0137               17
2441327.1738         	3865         -0.0207               18
    661.3800       	4209         -0.0237               44
    663.3220       	4211         -0.0248               38

      (O-C)s have been computed with the  elements given in GCVS 1969/70.
n is the number of observations in the minimum brightness.
	Using the elements corrected by us and grouping all the observations 
(431 observations in each colour) in 60 normal points we have plotted the 
average light curves, their graphic representation is given in the Figure 
attached.
	In the near future we are going to calculate the elements of the 
orbit and publish the results of the thorough investigation of the system X Tri.



                           [FIGURE 1]


				M.I. KUMSIASHVILI
				Abastumani Astrophysical
				Observatory