COMMISSION 27 OF THE I. A. U.
        INFORMATION BULLETIN ON VARIABLE STARS
                    Number 2212

                                  Konkoly Observatory
                                  Budapest
                                  1982 October 20

                                  HU ISSN 0374-0676


       PHOTOELECTRIC EPOCHS OF MINIMUM LIGHT, UZ PUPPIS


B,V Light curves of the southern eclipsing binary system UZ Puppis
(BD-13deg2170) were observed photoelectrically in January 1981 with the
50cm telescope at Cerro Tololo InterAmerican Observatory.  Two nearby
stars were monitored as comparison and check stars.  The observations
define one primary and one secondary eclipse curve. An iterative procedure 
based on the Hertzsprung (1928) method was used to determine the
epochs of minimum light,

JD Hel. Min. I = 2444613.6983
JD Hel. Min. II = 2444615.6871.

These and the photoelectric epochs of minimum light observed by
Bloomer (1973) were entered into a least squares solution which yielded
the ephemeris

Hel. JD Min. I = 2444613.6991+ 0.79485112d E.
                        +/- 6    +/-   15

The residuals or O-C's are negative for the primary minima and positive
for the secondary minima. However, the data are meager.
A least squares solution utilizing only the times of the primary
minima yielded

     Hel. JD Min. I = 2444613.69829 + 0.79485120d E.
                              +/- 4       +/- 15

An orbital analysis of the system is in progress.



           BEVERLY B. BOOKMYER
           Department of Physics and Astronomy
           Clemson University
           Clemson, South Carolina 29631 U.S.A.





References;

Bloomer, R.H. 1973, Dissertation, University of Florida. [BIBCODE 1973PhDT........14B ]
Hertzsprung, E. 1928, Bull. Astr. Inst. Neth. 4, 179. [BIBCODE 1928BAN.....4..172H ]