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HD 171681


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ICCD Speckle Observations of Binary Stars. XXIII. Measurements during 1982-1997 from Six Telescopes, with 14 New Orbits
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Mesures d'étoiles doubles faites à Nice
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1972A&AS....6..185C&db_key=AST

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Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1970A&AS....3...51C&db_key=AST

Etoiles doubles nouvelles (3e serie) decouvertes a Nice avec la lunette de 50 centimetres.
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Observation and Astrometry data

Constellation:ヘルクレス座
Right ascension:18h35m17.63s
Declination:+21°44'36.8"
Apparent magnitude:9.029
Proper motion RA:-9.3
Proper motion Dec:-1.4
B-T magnitude:9.29
V-T magnitude:9.051

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 171681
TYCHO-2 2000TYC 1582-1109-1
USNO-A2.0USNO-A2 1050-10969378
HIPHIP 91127

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