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III/155 HDE: Types, Positions 10639 Stars (Roeser+ 1991)
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Beginning of ReadMe :III/155 HDE: Types, Positions 10639 Stars (Roeser+ 1991)
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The Second Henry Draper Extension: Spectral Types and
Precise Positions for 10639 Stars
Roeser S., Bastian U., Wiese K.
<Astron. Astrophys. Suppl. Ser. 88, 277 (1991)>
=1991A&AS...88..277R
The Second Henry Draper Extension
Cannon A.J., Walton Mayall M.
<Harv. Ann., 112 (1949)>
=1949AnHar.112....1C
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ADC_Keywords: Positional data ; Spectral types ; Surveys
Description:
The second Henry Draper Extension, giving spectral classification for
about 87000 stars, up to now was published in the form of finding
charts only. This catalog contains a first portion (about 10000 stars)
of it in the form of a star catalogue, giving spectral types,
photographic magnitudes, precise positions (J2000) and, in many cases,
also proper motions of the stars HDE 332335 to HDE 342973. Positions
are derived from identifications of the HDE stars in the Astrographic
Catalogue. The mean error is about 0.3 arcsec. Magnitudes of the stars
are taken from the Astrographic Catalogue, for which we estimate an
accuracy of about 0.3 mag. To find proper motions the stars were also
identified with the PPM catalogue, whenever possible. Proper motions
in PPM typically have rms errors smaller than 0.5 arcsec/century.
Proper motions are given for about 2500 stars. A detailed description
of this catalog was done by Roser et al. (1991).
NOTE: This catalogue is superseded by the complete HDE charts by
Nesterov V.V. et al. (1995A&AS..110..367N), available as catalog
III/182 "The HDE Charts: accurate positions, proper motions,
magnitudes and spectral types of 86933 stars"