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HD 21971


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Pulkovo compilation of radial velocities for 35495 stars in a common system.
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Vitesses radiales. Catalogue WEB: Wilson Evans Batten. Subtittle: Radial velocities: The Wilson-Evans-Batten catalogue.
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A second list of wide visual binaries
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A second list of wide visual binaries
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A Spectroscopic Study of NGC 188.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1964ApJ...140..673G&db_key=AST

Radial Velocities, Spectral Types, and Luminosity Classes of 820 Stars.
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Membro dei seguenti gruppi:

Osservazione e dati astrometrici

Costellazione:Giraffa
Ascensione retta:03h36m03.82s
Declinazione:+63°17'17.3"
Magnitudine apparente:7.387
Distanza:769.231 parsec
Moto proprio RA:5.1
Moto proprio Dec:2.2
B-T magnitude:9.688
V-T magnitude:7.577

Cataloghi e designazioni:
Nomi esatti
HD 1989HD 21971
TYCHO-2 2000TYC 4066-848-1
USNO-A2.0USNO-A2 1500-03248256
HIPHIP 16789
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