hdgaia.mainivo://org.gavo.dc/hdgaia/q/mainThe GAVO DC teamCannon, A.J.Fabricius, C.Demleitner, M.2021-03-31T12:57:56ZGAVO Data Centre Team

Mönchhofstrasse 12-14, D-69120 Heidelberg

gavo@ari.uni-heidelberg.de+49 6221 54 1837surveysstellar-spectral-typesastronomical-object-identification This is the Henry Draper catalog (HD, Cannon & Pickering 1918-1924) as distributed by the Astronomical Data Center in 1989 (Vizier III/135A), with Gaia DR2 source_ids and positions added. The link to modern Gaia DR2 was done through Fabricius et al's match between HD and Tycho 2 (Vizier IV/25), TGAS to match Tycho 2 and Gaia DR1, and Gaia DR2 to match against Gaia DR1.1924AnHar..99....1Chttp://dc.g-vo.org/tableinfo/hdgaia.mainSurveyResearch0/0-11Opticalhdgaia This is the Henry Draper catalog (HD, Cannon & Pickering 1918-1924) as distributed by the Astronomical Data Center in 1989 (Vizier III/135A), with Gaia DR2 source_ids and positions added. The link to modern Gaia DR2 was done through Fabricius et al's match between HD and Tycho 2 (Vizier IV/25), TGAS to match Tycho 2 and Gaia DR1, and Gaia DR2 to match against Gaia DR1.hdgaia.main This is the Henry Draper catalog (HD, Cannon & Pickering 1918-1924) as distributed by the Astronomical Data Center in 1989 (Vizier III/135A), with Gaia DR2 source_ids and positions added. The link to modern Gaia DR2 was done through Fabricius et al's match between HD and Tycho 2 (Vizier IV/25), TGAS to match Tycho 2 and Gaia DR1, and Gaia DR2 to match against Gaia DR1.272150hdHD number for this objectmeta.id;meta.main8165.469999999999136075.5263985.529999999971.0intindexedprimarydmDurchmusterung identifier, taken either from the Bonner Durchmusterung (BD), Cordoba Durchmusterung (CD), or Cape Photographic Durchmusterung (CPD); stars not given in any of them are referenced by their AGK number.meta.id.crosscharnullablera_origOriginal right ascension for equinox J1900.0. Note that this position is only good to about an arcminute.pos.eq.racharnullabledec_origOriginal declination for equinox J1900.0. Note that this position is only good to about an arcminute.pos.eq.deccharnullablera_orig_2000Original right ascension for equinox J2000.0 (precession done by DC staff). Note that this position is only good to about an arcminute.pos.eq.ra0.00095306217.3102173.097344.624359.9911floatnullabledec_orig_2000Original declination for equinox J2000.0 (precession done by DC staff). Note that this position is only good to about an arcminute.pos.eq.dec-89.833-70.8263-11.089661.524889.56961floatnullablemv_meas'0' if the m_v is a measured value, '1' if it's a value inferred from m_pg and the spectral type.meta.codecharm_vPhotovisual magnitude or the star, except for magnitudes >= 20, which are object type flags (see note).magphot.mag;em.opt.V-1.586.338.910.7500.856987floatindexednullablemv_combC if m_v is a combined magnitude (with a neighbouring star given in this catalogue), NULL otherwise.meta.codecharnullablempg_meas'0' if the m_pg is a measured value, '1' if it's a value inferred from m_v and the spectral type.meta.codecharm_pgPhotographic magnitude or the star, except for magnitudes >= 20, which are object type flags (see note).magphot.mag;em.opt.B-1.5809.511.5500.994984floatnullablempg_combC if m_pg is a combined magnitude (with a neighbouring star given in this catalogue), NULL otherwise.meta.codecharnullablespectralSpectral type, given in upper and lower case as in the published catalog.src.sptypecharindexednullablepg_intensityPhotographic intensity of the spectrum estimated by Annie Cannon. The faintest spectra which could be classified with certainty were assigned a value of 1, while the densest are given as 10. For stars having two intensities in the published catalog, only the first is given here.meta.code.qual01.03.08.0140.8056476shortnullableremarksRemarks. See note for what the letters mean.meta.codecharnullablen_hdNumber of HD stars matched to a Tycho 2 source by Fabricius et al, 2002A&A...386..709F.meta.number11.01.01.020.9364578shortnullablen_tycNumber of Tycho 2 stars matched to a HD source by Fabricius et al, 2002A&A...386..709F.meta.number11.01.01.020.9364578shortnullablesource_idGaia DR2 source_id matching the HD object through Fabricius' Tycho 2 match and Gaia DR2's tycho2_best_neighbour. For four ambiguous matches, a unique match was randomly chosen (see reference URL).meta.id.cross76321576903683.777458606843629e+174.08509149002637e+186.740768604212051e+1869175049758244692480.9364578longnullablesource_id3Gaia eDR3 source_id matching the HD object through Fabricius' Tycho 2 match and Gaia DR2's tycho2_best_neighbour, and then Gaia eDR3's dr2_best_neighbour.meta.id.cross76321576903683.7773162338312064e+174.0850844806402734e+186.740770681515457e+1869175049758244692480.9364358longnullablegaia_raICRS Right Ascension from Gaia eDR3 (i.e., Epoch J2016)degpos.eq.ra;meta.main0.00043482517.504174.243344.576359.9930.936436doubleindexednullablegaia_decICRS Declination from Gaia eDR3 (i.e., Epoch J2016)degpos.eq.dec;meta.main-89.8312-70.7928-11.563261.272689.56950.936436doubleindexednullable