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HD 106187


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The First Eclipsing Binary Observations at the Ulupinar Astrophysics Observatory
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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:Vierge
Right ascension:12h13m06.40s
Declination:+11°56'18.3"
Apparent magnitude:9.815
Proper motion RA:17.8
Proper motion Dec:-72.5
B-T magnitude:10.747
V-T magnitude:9.892

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 106187
TYCHO-2 2000TYC 869-551-1
USNO-A2.0USNO-A2 0975-06912450
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