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HD 341794


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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.

Precise equatorial coordinates for known or new components in a series of about 200 double and multiple systems
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1984A&AS...56..351S&db_key=AST

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Osservazione e dati astrometrici

Costellazione:Ercole
Ascensione retta:18h15m47.15s
Declinazione:+23°59'32.6"
Magnitudine apparente:9.739
Moto proprio RA:-2.3
Moto proprio Dec:-4.2
B-T magnitude:10.187
V-T magnitude:9.776

Cataloghi e designazioni:
Nomi esatti   (Edit)
HD 1989HD 341794
TYCHO-2 2000TYC 2092-673-1
USNO-A2.0USNO-A2 1125-09207093
HIPHIP 89493
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