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HD 280410


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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.

Measurements of binary stars obtained at Pic-du-Midi and at Nice
A total of 112 visual measurements of 82 close binaries observed with 2mtelescope at Pic-du-Midi are presented. In addition, 344 measurements of163 close binaries were observed with the 74-cm and 50-cm refractors atNice. All measurements were made by a micrometer with illuminated wires.

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Osservazione e dati astrometrici

Costellazione:Auriga
Ascensione retta:05h04m15.49s
Declinazione:+34°27'39.1"
Magnitudine apparente:10.088
Moto proprio RA:17.2
Moto proprio Dec:-22.5
B-T magnitude:10.661
V-T magnitude:10.136

Cataloghi e designazioni:
Nomi esatti   (Edit)
HD 1989HD 280410
TYCHO-2 2000TYC 2396-542-1
USNO-A2.0USNO-A2 1200-02797359
HIPHIP 23584

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