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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
An empirical calibration of the Stromgren uvby-beta photometric systemfor the A, F, and early G supergiants is being derived. This paperexplains the observational program and the photometric reductiontechniques used and presents a catalog of new Stromgren photometry forover 600 A, F, and G supergiants.

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:Orion
Right ascension:06h08m56.70s
Declination:-02°02'13.3"
Apparent magnitude:7.06
Distance:172.712 parsecs
Proper motion RA:22.2
Proper motion Dec:-16
B-T magnitude:8.306
V-T magnitude:7.163

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 42131
TYCHO-2 2000TYC 4787-3181-1
USNO-A2.0USNO-A2 0825-01974339
HIPHIP 29149

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