VizieR

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VizieR

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I/275/ac2002 The AC 2000.2 Catalogue (Urban+ 2001)
All 4,621,751 stars from the AC2000.2 Catalogue (Detailed introduction) (4621751 rows)
  recno=1120866
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Note: Detailed introduction can be found in intro.tex (see also http://aries.usno.navy.mil/ad/ac.html) Direct links to Hipparcos and Tycho observations are provided from the relevant columns.

ColumnValue  Explain   (UCD)
_RAJ200003 34 35.96300 "h:m:s" Right ascension (FK5, Equinox=J2000.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.ra)
_DEJ2000+20 36 02.5400 "d:m:s" Declination (FK5, Equinox=J2000.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.dec)
_RAB195003 31 42.17104 "h:m:s" Right ascension (FK4, Equinox=B1950.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.ra)
_DEB1950+20 26 03.5856 "d:m:s" Declination (FK4, Equinox=B1950.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.dec)
_Glon166.79431154 deg Galactic longitude (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.galactic.lon)
_Glat-28.05299871 deg Galactic latitude (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.galactic.lat)
1120866recno 1120866  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

RAJ200003 34 35.963 "h:m:s" (i) R.A. , at epoch mEp (J2000) (Note 1)   (pos.eq.ra;meta.main)
DEJ2000+20 36 02.54 "d:m:s" (i) Decl. , at epoch mEp (Note)   (pos.eq.dec;meta.main)
Bmag12.00 mag Observed B magnitude (Note 2)   (phot.mag;em.opt.B)
mEp1896.915 yr Mean epoch of position (time.epoch)
Num 2  Number of images used for astrometry (meta.number)
e_RAJ2000 0.058 arcsec Standard deviation of Right Ascension (Note 3)   (stat.error;pos.eq.ra)
e_DEJ2000 0.018 arcsec Standard deviation of Declination (Note 3)   (stat.error;pos.eq.dec)
ACnum 641356  (i) USNO generated identifier (meta.id;meta.main)
HIP    Hipparcos number (Note 4)   (meta.id)
m_HIP   Hipparcos component identifier (Note 4)   (meta.code.multip)
TYC2124200060801  Tycho-2 identifier (Note 5)   (meta.id)
Vmag10.951 mag V magnitude (Note 2)   (phot.mag;em.opt.V)
magflg    [1,3] Magnitude warning flag (Note 6)   (meta.code)
verflg    [1] Verification flag (Note 7)   (meta.code)
  
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