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=308.9561054 -18.4795214, eq=J2000, rs=2
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Note: UCAC5 document

ColumnValue  Explain   (UCD)
_r0.000 arcsec Distance from center (308.9561054-18.4795214)[FK5/J2000], at Epoch of catalog (EPucac) (pos.angDistance)
_RAJ200020 35 49.465344 "h:m:s" Right ascension (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.ra)
_DEJ2000-18 28 46.27854 "d:m:s" Declination (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.dec)
_RAB195020 32 58.138801 "h:m:s" Right ascension (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.ra)
_DEB1950-18 39 11.43221 "d:m:s" Declination (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.dec)
_Glon026.776606706 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-31.053496022 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)

ira308.9561054 deg (i) UCAC right ascension (J2000) at epoch "EPucac" on Gaia reference frame (ira) (pos.eq.ra;meta.main)
idc-18.4795214 deg (i) UCAC declination (J2000) at epoch "EPucac" on Gaia reference frame (idc) (pos.eq.dec;meta.main)
srcid6861528392177794304  Gaia source ID (srcid) (meta.id;meta.main)
rag308.9561136 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-18.4795386 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 2  Number of images used for mean position (nu) (meta.number)
epu1999.624 yr UCAC epoch (epu) (time.epoch)
pmur 1.8 mas/yr UCAC/Gaia proper motion in RA*cosDE (pmur) (pos.pm;pos.eq.ra)
pmer 3.2 mas/yr rms uncertainty on pmRA (pmer) (stat.error;pos.pm;pos.eq.ra)
pmud -4.0 mas/yr UCAC/Gaia proper motion in DE (pmud) (pos.pm;pos.eq.dec)
pmed 3.1 mas/yr rms uncertainty on pmDE (pmed) (stat.error;pos.pm;pos.eq.dec)
gmag15.432 mag Gaia G magnitude (gmag) (phot.mag;em.opt.R)
umag15.614 mag Means UCAC model magnitude (umag) (phot.mag;em.opt)
rmag15.220 mag Photographic R magnitude from NOMAD (rmag) (phot.mag;em.opt.R)
jmag14.321 mag 2MASS J magnitude (jmag) (phot.mag;em.IR.J)
hmag13.962 mag 2MASS H magnitude (hmag) (phot.mag;em.IR.H)
kmag13.807 mag 2MASS K magnitude (kmag) (phot.mag;em.IR.K)
  
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