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=055.0002856 -19.4263278, eq=J2000, rs=2
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Note: UCAC5 document

ColumnValue  Explain   (UCD)
_r0.000 arcsec Distance from center (055.0002856-19.4263278)[FK5/J2000], at Epoch of catalog (EPucac) (pos.angDistance)
_RAJ200003 40 00.068426 "h:m:s" Right ascension (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.ra)
_DEJ2000-19 25 34.78384 "d:m:s" Declination (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.dec)
_RAB195003 37 45.677306 "h:m:s" Right ascension (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.ra)
_DEB1950-19 35 12.83728 "d:m:s" Declination (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.dec)
_Glon210.863103518 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-50.715607527 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)

ira055.0002856 deg (i) UCAC right ascension (J2000) at epoch "EPucac" on Gaia reference frame (ira) (pos.eq.ra;meta.main)
idc-19.4263278 deg (i) UCAC declination (J2000) at epoch "EPucac" on Gaia reference frame (idc) (pos.eq.dec;meta.main)
srcid5101125201395981824  Gaia source ID (srcid) (meta.id;meta.main)
rag 55.0002489 deg Gaia right ascension (ICRS) at epoch 2015.0 (rag) (Note 1)   (pos.eq.ra)
erg 5.0 mas rms uncertainty on RAgaia (erg) (Note 1)   (stat.error)
dcg-19.4264058 deg Gaia declination (ICRS) at epoch 2015.0 (dcg) (Note 1)   (pos.eq.dec)
edg 2.8 mas rms uncertainty on DEgaia (edg) (Note 1)   (stat.error)
flg2   [1/3] TGAS/NOMAD flag (flg) (Note 2)   (meta.code)
nu 2  Number of images used for mean position (nu) (meta.number)
epu1999.797 yr UCAC epoch (epu) (time.epoch)
pmur -8.2 mas/yr UCAC/Gaia proper motion in RA*cosDE (pmur) (pos.pm;pos.eq.ra)
pmer 5.9 mas/yr rms uncertainty on pmRA (pmer) (stat.error;pos.pm;pos.eq.ra)
pmud -18.5 mas/yr UCAC/Gaia proper motion in DE (pmud) (pos.pm;pos.eq.dec)
pmed 5.9 mas/yr rms uncertainty on pmDE (pmed) (stat.error;pos.pm;pos.eq.dec)
gmag17.144 mag Gaia G magnitude (gmag) (phot.mag;em.opt.R)
umag16.017 mag Means UCAC model magnitude (umag) (phot.mag;em.opt)
rmag 9.750 mag Photographic R magnitude from NOMAD (rmag) (phot.mag;em.opt.R)
jmag13.685 mag 2MASS J magnitude (jmag) (phot.mag;em.IR.J)
hmag13.176 mag 2MASS H magnitude (hmag) (phot.mag;em.IR.H)
kmag12.660 mag 2MASS K magnitude (kmag) (phot.mag;em.IR.K)
  
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