Ap/Am ivo://nasa.heasarc/cpstars NASA/GSFC HEASARC Renson et al. 2026-04-03 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Star This table contains a catalog of 8205 known or suspected Ap, HgMn and Am stars. This is a major update of the authors' first edition of their catalog of Ap and Am stars, and includes revised identifications, additional stars, and revised information obtained m the literature. This table was created by the HEASARC in July 2009 based on <a href="https://cdsarc.cds.unistra.fr/ftp/cats/III/260">CDS Catalog III/260</a> file catalog.dat. It replaced an earlier version based on the 1st edition of the Ap and Am Stars Catalog (Renson et al. 1991). This is a service provided by NASA HEASARC . 2009A&A...498..961R https://heasarc.gsfc.nasa.gov/W3Browse/all/cpstars.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=cpstars& GET text/xml 180 99999 true 73.08833333 -89.27391667 0.0166666666666667 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=cpstars GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_cpstars&Action=More+Options&Action=Parameter+Search&ConeAdd=1 STAR CATALOG 0.0166666666666667 Optical public cpstars Catalog of Ap, HgMn and Am Stars name Catalog Source Designation meta.id;meta.main char nullable vmag Magnitude, Generally V mag phot.mag;em.opt.V double nullable lii Galactic Longitude degree pos.galactic.lon double nullable source_number Sequential Identification Number for Each Source in Catalog meta.id;src int nullable "__row" System index column char nullable "__z_ra_dec" System unit vector column double nullable hbeta H-beta index from Stroemgren Photometry mag spect.index;em.line.Hbeta double nullable dm Durchmusterung (BD, CD, CP) Designation meta.id char nullable hip_component Flag Indicates Hipparcos Multiplicity meta.code.multip char nullable "__y_ra_dec" System unit vector column double nullable dm_component Flag Indicates Durchmusterung Multiplicity meta.code.multip char nullable tyc_number Tycho-2 Identification Number meta.id char nullable note_codes Flag Indicates Detailed Notes meta.note char nullable hd_number HD(E) Identification Number meta.id int nullable c1 c1 = (u-v)-(v-b) from Stroemgren Photometry mag phot.color;em.opt double nullable spect_type Spectral Classification src.spType char nullable class Browse Object Classification src.class short nullable hd_component Flag Indicates HD(E) Multiplicity meta.code.multip char nullable "__x_ra_dec" System unit vector column double nullable ub_color U-B Color Index mag phot.color;em.opt.U;em.opt.B double nullable bv_color B-V Color Index mag phot.color;em.opt.B;em.opt.V double nullable by_color b-y Color Index from Stroemgren Photometry mag phot.color;em.opt.B;em.opt.V double nullable hr_number HR V/50 Identification Number meta.id short nullable bii Galactic Latitude degree pos.galactic.lat double nullable hip_number Hipparcos Identification Number meta.id int nullable dec Declination degree pos.eq.dec;meta.main double nullable m1 m1 = (v-b)-(b-y) from Stroemgren Photometry mag phot.color;em.opt double nullable alt_name Alternative Bayer/Flamsteed Designation meta.id char nullable ra Right Ascension degree pos.eq.ra;meta.main double nullable cp_prob_flag Flag Indicates Peculiarity Probability meta.code char nullable hr_component Flag Indicates HR Multiplicity meta.code.multip char nullable