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=280.3048368 -01.9681778, eq=J2000, rs=2
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Note: UCAC5 document

ColumnValue  Explain   (UCD)
_r0.000 arcsec Distance from center (280.3048368-01.9681778)[FK5/J2000], at Epoch of catalog (EPucac) (pos.angDistance)
_RAJ200018 41 13.160852 "h:m:s" Right ascension (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.ra)
_DEJ2000-01 58 05.43302 "d:m:s" Declination (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.dec)
_RAB195018 38 37.091534 "h:m:s" Right ascension (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.ra)
_DEB1950-02 00 58.55414 "d:m:s" Declination (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.dec)
_Glon030.014707083 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+01.374360692 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)

ira280.3048368 deg (i) UCAC right ascension (J2000) at epoch "EPucac" on Gaia reference frame (ira) (pos.eq.ra;meta.main)
idc-01.9681778 deg (i) UCAC declination (J2000) at epoch "EPucac" on Gaia reference frame (idc) (pos.eq.dec;meta.main)
srcid4259739183968751232  Gaia source ID (srcid) (meta.id;meta.main)
rag280.3048347 deg Gaia right ascension (ICRS) at epoch 2015.0 (rag) (Note 1)   (pos.eq.ra)
erg 0.3 mas rms uncertainty on RAgaia (erg) (Note 1)   (stat.error)
dcg -1.9682258 deg Gaia declination (ICRS) at epoch 2015.0 (dcg) (Note 1)   (pos.eq.dec)
edg 0.3 mas rms uncertainty on DEgaia (edg) (Note 1)   (stat.error)
flg1   [1/3] TGAS/NOMAD flag (flg) (Note 2)   (meta.code)
nu 4  Number of images used for mean position (nu) (meta.number)
epu2000.588 yr UCAC epoch (epu) (time.epoch)
pmur -0.5 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 -12.0 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)
gmag10.558 mag Gaia G magnitude (gmag) (phot.mag;em.opt.R)
umag10.730 mag Means UCAC model magnitude (umag) (phot.mag;em.opt)
rmag10.470 mag Photographic R magnitude from NOMAD (rmag) (phot.mag;em.opt.R)
jmag 9.821 mag 2MASS J magnitude (jmag) (phot.mag;em.IR.J)
hmag 8.479 mag 2MASS H magnitude (hmag) (phot.mag;em.IR.H)
kmag 8.576 mag 2MASS K magnitude (kmag) (phot.mag;em.IR.K)
  
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