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HD 127853


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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:Bootes
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:
Proper Names   (Edit)
HD 1989HD 127853
TYCHO-2 2000TYC 910-733-1
USNO-A2.0USNO-A2 0975-07515727

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