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HD 25581


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Hyades and Sirius supercluster members brighter than magnitude(V) 7.1. I - The first six hours of right ascension
This is the first of four papers listing the probable members of theHyades and Sirius superclusters among stars brighter than V = 7.1 mag.The star sample is contained in the Bright Star Catalogue and itsSupplement, augmented with a further supplement of 550 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 550 starsdiscussed here, as well as for all supercluster members.

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Osservazione e dati astrometrici

Costellazione:Reticolo
Ascensione retta:03h59m59.33s
Declinazione:-61°53'41.2"
Magnitudine apparente:6.696
Distanza:431.034 parsec
Moto proprio RA:0
Moto proprio Dec:0
B-T magnitude:8.676
V-T magnitude:6.86

Cataloghi e designazioni:
Nomi esatti   (Edit)
HD 1989HD 25581
TYCHO-2 2000TYC 8868-1783-1
USNO-A2.0USNO-A2 0225-01004296
HIPHIP 18677

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