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=282.7469271 +22.8233356, eq=J2000, rs=2
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Note: UCAC5 document

ColumnValue  Explain   (UCD)
_r0.000 arcsec Distance from center (282.7469271+22.8233356)[FK5/J2000], at Epoch of catalog (EPucac) (pos.angDistance)
_RAJ200018 50 59.262395 "h:m:s" Right ascension (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.ra)
_DEJ2000+22 49 23.99494 "d:m:s" Declination (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.dec)
_RAB195018 48 52.889200 "h:m:s" Right ascension (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.ra)
_DEB1950+22 45 46.92482 "d:m:s" Declination (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.dec)
_Glon053.420021652 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+10.281436641 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)

ira282.7469271 deg (i) UCAC right ascension (J2000) at epoch "EPucac" on Gaia reference frame (ira) (pos.eq.ra;meta.main)
idc+22.8233356 deg (i) UCAC declination (J2000) at epoch "EPucac" on Gaia reference frame (idc) (pos.eq.dec;meta.main)
srcid4531714655088824064  Gaia source ID (srcid) (meta.id;meta.main)
rag282.7469308 deg Gaia right ascension (ICRS) at epoch 2015.0 (rag) (Note 1)   (pos.eq.ra)
erg 0.7 mas rms uncertainty on RAgaia (erg) (Note 1)   (stat.error)
dcg 22.8233647 deg Gaia declination (ICRS) at epoch 2015.0 (dcg) (Note 1)   (pos.eq.dec)
edg 0.8 mas rms uncertainty on DEgaia (edg) (Note 1)   (stat.error)
flg2   [1/3] TGAS/NOMAD flag (flg) (Note 2)   (meta.code)
nu 7  Number of images used for mean position (nu) (meta.number)
epu2001.673 yr UCAC epoch (epu) (time.epoch)
pmur 0.9 mas/yr UCAC/Gaia proper motion in RA*cosDE (pmur) (pos.pm;pos.eq.ra)
pmer 1.1 mas/yr rms uncertainty on pmRA (pmer) (stat.error;pos.pm;pos.eq.ra)
pmud 7.9 mas/yr UCAC/Gaia proper motion in DE (pmud) (pos.pm;pos.eq.dec)
pmed 1.1 mas/yr rms uncertainty on pmDE (pmed) (stat.error;pos.pm;pos.eq.dec)
gmag12.343 mag Gaia G magnitude (gmag) (phot.mag;em.opt.R)
umag12.677 mag Means UCAC model magnitude (umag) (phot.mag;em.opt)
rmag11.410 mag Photographic R magnitude from NOMAD (rmag) (phot.mag;em.opt.R)
jmag11.108 mag 2MASS J magnitude (jmag) (phot.mag;em.IR.J)
hmag10.758 mag 2MASS H magnitude (hmag) (phot.mag;em.IR.H)
kmag10.669 mag 2MASS K magnitude (kmag) (phot.mag;em.IR.K)
  
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