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

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

Oct 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988geoce..16.....d&link_type=abstract

GEOS Circular on Eclipsing Binaries, No. EB 16, 11 p. (1988)

Physics

Eclipsing Binaries:Ephemerides, Periods

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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