VizieR

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VizieR

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I/340/ucac5 UCAC5 Catalogue (Zacharias+ 2017)
Fifth U.S. Naval Observatory CCD Astrograph Catalog (original column names in green) (107758513 rows)
  -c=169.5338486 +31.5410053, eq=J2000, rs=2
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Note: UCAC5 document

ColumnValue  Explain   (UCD)
_r0.000 arcsec Distance from center (169.5338486+31.5410053)[FK5/J2000], at Epoch of catalog (EPucac) (pos.angDistance)
_RAJ200011 18 08.122042 "h:m:s" Right ascension (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.ra)
_DEJ2000+31 32 27.63481 "d:m:s" Declination (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.dec)
_RAB195011 15 26.586756 "h:m:s" Right ascension (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.ra)
_DEB1950+31 48 52.50011 "d:m:s" Declination (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.dec)
_Glon195.077051932 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+69.234990156 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)

ira169.5338486 deg (i) UCAC right ascension (J2000) at epoch "EPucac" on Gaia reference frame (ira) (pos.eq.ra;meta.main)
idc+31.5410053 deg (i) UCAC declination (J2000) at epoch "EPucac" on Gaia reference frame (idc) (pos.eq.dec;meta.main)
srcid 756853708064827264  Gaia source ID (srcid) (meta.id;meta.main)
rag169.5339147 deg Gaia right ascension (ICRS) at epoch 2015.0 (rag) (Note 1)   (pos.eq.ra)
erg 0.1 mas rms uncertainty on RAgaia (erg) (Note 1)   (stat.error)
dcg 31.5409628 deg Gaia declination (ICRS) at epoch 2015.0 (dcg) (Note 1)   (pos.eq.dec)
edg 0.1 mas rms uncertainty on DEgaia (edg) (Note 1)   (stat.error)
flg2   [1/3] TGAS/NOMAD flag (flg) (Note 2)   (meta.code)
nu 4  Number of images used for mean position (nu) (meta.number)
epu2001.392 yr UCAC epoch (epu) (time.epoch)
pmur 14.9 mas/yr UCAC/Gaia proper motion in RA*cosDE (pmur) (pos.pm;pos.eq.ra)
pmer 1.5 mas/yr rms uncertainty on pmRA (pmer) (stat.error;pos.pm;pos.eq.ra)
pmud -11.3 mas/yr UCAC/Gaia proper motion in DE (pmud) (pos.pm;pos.eq.dec)
pmed 1.5 mas/yr rms uncertainty on pmDE (pmed) (stat.error;pos.pm;pos.eq.dec)
gmag13.973 mag Gaia G magnitude (gmag) (phot.mag;em.opt.R)
umag14.420 mag Means UCAC model magnitude (umag) (phot.mag;em.opt)
rmag30.000 mag Photographic R magnitude from NOMAD (rmag) (phot.mag;em.opt.R)
jmag12.868 mag 2MASS J magnitude (jmag) (phot.mag;em.IR.J)
hmag12.593 mag 2MASS H magnitude (hmag) (phot.mag;em.IR.H)
kmag12.734 mag 2MASS K magnitude (kmag) (phot.mag;em.IR.K)
  
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