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HD 170472


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A Photometric Study of the W UMa-type Eclipsing Binary System GSC 0445-1993
Several new light minimum times for the eclipsing binary GSC0445–1993 have been determined from the observations by Koppelmanet al. and the orbital period of this system was revised. A photometricanalysis was carried out using the 2003 version of the Wilson-Devinneycode. The results reveal that GSC 0445–1993 is a W-type eclipsingbinary with a mass ratio of q = 0.323(±0.002) and an over-contactdegree of f = 22.8%(±4.2%). A small temperature differencebetween the components of ΔT = 135 K and an orbitalinclination of i = 65.7°(±0.3°) were obtained. Theasymmetry of its light curve (i.e., the O'Connell effect) for thisbinary star is explained by the presence of a dark spot on the moremassive component.

NSV 10892 is a W UMa Eclipsing Binary
NSV 10892 is an EW with a period of approximately 9 hours and anamplitude of 0.36 magnitudes.

Southern open clusters II. UBV and Hbeta photometry of 11 clusters between galactic longitudes 259d and 280d
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1973A&AS....9...97V&db_key=AST

The Galactic Cluster, NGC 6633.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1958ApJ...127..539H&db_key=AST

Untersuchung der offenen Sternhaufen IC 4665, NGC 6633, IC 4756
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Observation and Astrometry data

Constellation:Ophiucus
Right ascension:18h29m19.79s
Declination:+06°51'05.1"
Apparent magnitude:9.102
Proper motion RA:0.1
Proper motion Dec:-2.6
B-T magnitude:9.152
V-T magnitude:9.107

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 170472
TYCHO-2 2000TYC 445-1293-1
USNO-A2.0USNO-A2 0900-12967852
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