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HD 278813


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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.

Spectroscopic studies of stars in Per OB2.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1977AJ.....82..598G&db_key=AST

A Study of the II Persei Association.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1960ApJ...132...58S&db_key=AST

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Osservazione e dati astrometrici

Costellazione:Perseo
Ascensione retta:03h33m53.12s
Declinazione:+34°17'06.3"
Magnitudine apparente:9.393
Moto proprio RA:-3.6
Moto proprio Dec:-3.6
B-T magnitude:9.729
V-T magnitude:9.421

Cataloghi e designazioni:
Nomi esatti   (Edit)
HD 1989HD 278813
TYCHO-2 2000TYC 2350-1664-1
USNO-A2.0USNO-A2 1200-01624065
HIPHIP 16621

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