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=1575060
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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)
_RAJ200008 57 34.77100 "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+15 34 50.7100 "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)
_RAB195008 54 47.54735 "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+15 46 27.2872 "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)
_Glon212.28150086 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+34.80997186 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)
1575060recno 1575060  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

RAJ200008 57 34.771 "h:m:s" (i) R.A. , at epoch mEp (J2000) (Note 1)   (pos.eq.ra;meta.main)
DEJ2000+15 34 50.71 "d:m:s" (i) Decl. , at epoch mEp (Note)   (pos.eq.dec;meta.main)
Bmag 5.94 mag Observed B magnitude (Note 2)   (phot.mag;em.opt.B)
mEp1902.688 yr Mean epoch of position (time.epoch)
Num 4  Number of images used for astrometry (meta.number)
e_RAJ2000 0.382 arcsec Standard deviation of Right Ascension (Note 3)   (stat.error;pos.eq.ra)
e_DEJ2000 0.057 arcsec Standard deviation of Declination (Note 3)   (stat.error;pos.eq.dec)
ACnum 529165  (i) USNO generated identifier (meta.id;meta.main)
HIP 44001   Hipparcos number (Note 4)   (meta.id)
m_HIP   Hipparcos component identifier (Note 4)   (meta.code.multip)
TYC2139400212101  Tycho-2 identifier (Note 5)   (meta.id)
Vmag 5.705 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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