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HD 30332


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A photometric survey of the eclipsing RS CVn-type system RZ Eridani - Starspot variability, circumstellar matter, tidal evolution
Results are presented of monitoring of the RS CVn-type eclipsing binaryRZ Eridani, observed in the seven colors of the Geneva photometricsystem between November 1977 and April 1989. It is shown that theprimary is an A8-F0IV star, which was stable during the 12 years of thesurvey. The secondary component, a G8-K0IV-III star, exhibits threekinds of stellar variability: a starspot effect with a period of about35 d (stellar rotation), varying from year to year; a reflection effectof the light from the primary component, with a period equal to theorbital one (the orbital period); and a long-term variability,tentatively attributed to be due to a stellar activity cycle.

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Observation and Astrometry data

Constellation:Eridanus
Right ascension:04h46m09.49s
Declination:-11°33'40.3"
Apparent magnitude:7.656
Distance:304.878 parsecs
Proper motion RA:3.7
Proper motion Dec:6.6
B-T magnitude:7.634
V-T magnitude:7.655

Catalogs and designations:
Proper Names
HD 1989HD 30332
TYCHO-2 2000TYC 5325-1515-1
USNO-A2.0USNO-A2 0750-01094317
HIPHIP 22169

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