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HD 42131


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Ca II H and K Filter Photometry on the UVBY System. II. The Catalog of Observations
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The calibration of the Stromgren photometric system for A, F and early G supergiants. I - The observational data
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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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Dades d'Observació i Astrometria

Constel·lació:Orion
Ascensió Recta:06h08m56.70s
Declinació:-02°02'13.3"
Magnitud Aparent:7.06
Distancia:172.712 parsecs
Moviment propi RA:22.2
Moviment propi Dec:-16
B-T magnitude:8.306
V-T magnitude:7.163

Catàlegs i designacions:
Noms Propis
HD 1989HD 42131
TYCHO-2 2000TYC 4787-3181-1
USNO-A2.0USNO-A2 0825-01974339
HIPHIP 29149

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