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HD 100721


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Hyades and Sirius supercluster members brighter than magnitude (V) 7.1. II - Right ascension six to twelve hours
The present star sample is contained in the Bright Star Catalogue andits Supplement, augmented with a further supplement of 788 stars foundduring various observing programs over the past 40 years. Accurate,four-color and H-beta, or (RI), photometry is available for most of thesupercluster members. The criteria for membership are the comparisons ofthe proper motion, radial velocity, and luminosity obtained from thesupercluster parameters with the observed motions and the luminosityderived from the photometric parameters. New proper motions, based onall available catalogs, have been derived for the additional 788 starsdiscussed here, as well as all supercluster members.

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Observation and Astrometry data

Constellation:Hydra
Right ascension:11h35m14.12s
Declination:-35°36'43.4"
Apparent magnitude:6.875
Distance:198.807 parsecs
Proper motion RA:-39.1
Proper motion Dec:1.2
B-T magnitude:7.012
V-T magnitude:6.887

Catalogs and designations:
Proper Names
HD 1989HD 100721
TYCHO-2 2000TYC 7224-1786-1
USNO-A2.0USNO-A2 0525-14257331
HIPHIP 56520

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