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=309.9228638 -52.3213744, eq=J2000, rs=2
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Note: UCAC5 document

ColumnValue  Explain   (UCD)
_r0.000 arcsec Distance from center (309.9228638-52.3213744)[FK5/J2000], at Epoch of catalog (EPucac) (pos.angDistance)
_RAJ200020 39 41.488739 "h:m:s" Right ascension (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.ra)
_DEJ2000-52 19 16.99120 "d:m:s" Declination (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.dec)
_RAB195020 36 00.634896 "h:m:s" Right ascension (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.ra)
_DEB1950-52 29 52.50745 "d:m:s" Declination (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.dec)
_Glon346.233204149 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-37.473255922 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)

ira309.9228638 deg (i) UCAC right ascension (J2000) at epoch "EPucac" on Gaia reference frame (ira) (pos.eq.ra;meta.main)
idc-52.3213744 deg (i) UCAC declination (J2000) at epoch "EPucac" on Gaia reference frame (idc) (pos.eq.dec;meta.main)
srcid6474503666454792576  Gaia source ID (srcid) (meta.id;meta.main)
rag309.9229369 deg Gaia right ascension (ICRS) at epoch 2015.0 (rag) (Note 1)   (pos.eq.ra)
erg 0.2 mas rms uncertainty on RAgaia (erg) (Note 1)   (stat.error)
dcg-52.3215233 deg Gaia declination (ICRS) at epoch 2015.0 (dcg) (Note 1)   (pos.eq.dec)
edg 0.2 mas rms uncertainty on DEgaia (edg) (Note 1)   (stat.error)
flg1   [1/3] TGAS/NOMAD flag (flg) (Note 2)   (meta.code)
nu14  Number of images used for mean position (nu) (meta.number)
epu1998.678 yr UCAC epoch (epu) (time.epoch)
pmur 9.9 mas/yr UCAC/Gaia proper motion in RA*cosDE (pmur) (pos.pm;pos.eq.ra)
pmer 0.7 mas/yr rms uncertainty on pmRA (pmer) (stat.error;pos.pm;pos.eq.ra)
pmud -32.8 mas/yr UCAC/Gaia proper motion in DE (pmud) (pos.pm;pos.eq.dec)
pmed 0.7 mas/yr rms uncertainty on pmDE (pmed) (stat.error;pos.pm;pos.eq.dec)
gmag11.666 mag Gaia G magnitude (gmag) (phot.mag;em.opt.R)
umag11.890 mag Means UCAC model magnitude (umag) (phot.mag;em.opt)
rmag11.460 mag Photographic R magnitude from NOMAD (rmag) (phot.mag;em.opt.R)
jmag10.714 mag 2MASS J magnitude (jmag) (phot.mag;em.IR.J)
hmag10.385 mag 2MASS H magnitude (hmag) (phot.mag;em.IR.H)
kmag10.271 mag 2MASS K magnitude (kmag) (phot.mag;em.IR.K)
  
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