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=54403
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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 11.60400 "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+64 49 28.7700 "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 29 44.80966 "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+64 39 25.8365 "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)
_Glon139.16509242 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 +7.21532115 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)
54403recno 54403  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

RAJ200003 34 11.604 "h:m:s" (i) R.A. , at epoch mEp (J2000) (Note 1)   (pos.eq.ra;meta.main)
DEJ2000+64 49 28.77 "d:m:s" (i) Decl. , at epoch mEp (Note)   (pos.eq.dec;meta.main)
Bmag11.73 mag Observed B magnitude (Note 2)   (phot.mag;em.opt.B)
mEp1899.898 yr Mean epoch of position (time.epoch)
Num 2  Number of images used for astrometry (meta.number)
e_RAJ2000 0.020 arcsec Standard deviation of Right Ascension (Note 3)   (stat.error;pos.eq.ra)
e_DEJ2000 0.294 arcsec Standard deviation of Declination (Note 3)   (stat.error;pos.eq.dec)
ACnum 1770156  (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)
TYC2407000045901  Tycho-2 identifier (Note 5)   (meta.id)
Vmag10.260 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)
  
elapse time 1

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