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HD 283613

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Micrometer Measures of Double Stars Micrometer measures of 795 double stars made with the 26 inch (0.66 m)refractor of the US Naval Observatory from 1984 to 1990 are presented.
The Henry Draper Extension Charts: A catalogue of accurate positions, proper motions, magnitudes and spectral types of 86933 stars The Henry Draper Extension Charts (HDEC), published in the form offinding charts, provide spectral classification for some 87000 starsmostly between 10th and 11th magnitude. This data, being highlyvaluable, as yet was practically unusable for modern computer-basedastronomy. An earlier pilot project (Roeser et al. 1991) demonstrated apossibility to convert this into a star catalogue, using measurements ofcartesian coordinates of stars on the charts and positions of theAstrographic Catalogue (AC) for subsequent identification. We presenthere a final HDEC catalogue comprising accurate positions, propermotions, magnitudes and spectral classes for 86933 stars of the HenryDraper Extension Charts.
Etoiles doubles nouvelles (8^{e} série) découvertes à Nice à la lunette de 50 CM Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1972A&AS....6..419C&db_key=AST

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Osservazione e dati astrometrici

Costellazione:	Toro
Ascensione retta:	04^h18^m10.21^s
Declinazione:	+24Â°54'39.8"
Magnitudine apparente:	8.673
Distanza:	204.918 parsec
Moto proprio RA:	2
Moto proprio Dec:	-4.4
B-T magnitude:	10.332
V-T magnitude:	8.81

Cataloghi e designazioni:

Nomi esatti	(Edit)
HD 1989	HD 283613
TYCHO-2 2000	TYC 1819-1951-1
USNO-A2.0	USNO-A2 1125-01559633
HIP	HIP 20065

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