19 times of minima and first ephemeris for the EB star RRVI-51. Revised edition.

Details 19 times of minima and first ephemeris for the EB star RRVI-51. Revised edition. 19 times of minima and first ephemeris for the EB star RRVI-51. Revised edition.

Jun 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990geoce..16.....d&link_type=abstract

GEOS Circular on Eclipsing Binaries, No. EB 16, 11 p. (1990). Revised ed.

Physics

Eclipsing Binaries:Periods, Ephemerides

Scientific paper

RRVI-51 was discovered in the sixties. The star was noted EA: relying on the 63 photographic observations (Kinman et al., 1982), but still remains particularly under-studied. Using 19 times of minimum (17 visual times recorded by 5 GEOS observers, 1 photographic minimum and 1 photoelectric minimum recorded by a GEOS Belgian team), it has been possible to calculate a first ephemeris: Min 1 = hel JD 2,442,776.961 + 1.199839 E. From all available visual estimates, RRVI-51 appears to be an EB eclipsing star while photographic observations seem to back up the idea of EA type. Photoelectric measurements clearly confirm the EB type. The primary minimum is easy to discriminate from the secondary one, due to their sharp different amplitudes.

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