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Mesures d'etoiles doubles faites aux lunettes de 74 et 50 CM de l'Observatoire de la Cote d'Azur
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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.
| Observations of double stars and new pairs. XV
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| Interstellar extinction in the Taurus dark clouds. II
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Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1972A&AS....6..177C&db_key=AST
| The polarization of T and RY Tau.
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Membro dei seguenti gruppi:
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Osservazione e dati astrometrici
| Costellazione: | Toro |
| Ascensione retta: | 04h25m30.11s |
| Declinazione: | +19°41'33.9" |
| Magnitudine apparente: | 9.364 |
| Moto proprio RA: | 11.2 |
| Moto proprio Dec: | -7.1 |
| B-T magnitude: | 10.587 |
| V-T magnitude: | 9.465 |
Cataloghi e designazioni:
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