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BV observations of W UMa-type binaries - CK Boo, BI CVn, and AH VIR
Photoelectric BV observations of W UMa-type binaries CK Boo, BI CVn, andAH Vir are presented, and light curve variations and shifts of minimaare discussed in the context of stellar activity and mass transfer. TheO-C increments in three systems were found to be 0.08, 0.80, and 0.60 sper revolution, respectively. The new ephemeris for the futureobservations were also found.
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Observation and Astrometry data
| Constellation: | Βοώτης |
| Right ascension: | 14h33m31.10s |
| Declination: | +09°12'26.8" |
| Apparent magnitude: | 9.237 |
| Proper motion RA: | -80.7 |
| Proper motion Dec: | -28.2 |
| B-T magnitude: | 9.9 |
| V-T magnitude: | 9.292 |
Catalogs and designations:
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