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=019.3968596 +49.7713619, eq=J2000, rs=2
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Note: UCAC5 document

ColumnValue  Explain   (UCD)
_r0.000 arcsec Distance from center (019.3968596+49.7713619)[FK5/J2000], at Epoch of catalog (EPucac) (pos.angDistance)
_RAJ200001 17 35.245861 "h:m:s" Right ascension (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.ra)
_DEJ2000+49 46 16.89683 "d:m:s" Declination (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.dec)
_RAB195001 14 35.857138 "h:m:s" Right ascension (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.ra)
_DEB1950+49 30 29.51413 "d:m:s" Declination (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.dec)
_Glon127.257715390 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-12.880626993 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)

ira019.3968596 deg (i) UCAC right ascension (J2000) at epoch "EPucac" on Gaia reference frame (ira) (pos.eq.ra;meta.main)
idc+49.7713619 deg (i) UCAC declination (J2000) at epoch "EPucac" on Gaia reference frame (idc) (pos.eq.dec;meta.main)
srcid 403272861882893824  Gaia source ID (srcid) (meta.id;meta.main)
rag 19.3968675 deg Gaia right ascension (ICRS) at epoch 2015.0 (rag) (Note 1)   (pos.eq.ra)
erg 18.1 mas rms uncertainty on RAgaia (erg) (Note 1)   (stat.error)
dcg 49.7713692 deg Gaia declination (ICRS) at epoch 2015.0 (dcg) (Note 1)   (pos.eq.dec)
edg 1.5 mas rms uncertainty on DEgaia (edg) (Note 1)   (stat.error)
flg2   [1/3] TGAS/NOMAD flag (flg) (Note 2)   (meta.code)
nu 4  Number of images used for mean position (nu) (meta.number)
epu2002.860 yr UCAC epoch (epu) (time.epoch)
pmur 1.5 mas/yr UCAC/Gaia proper motion in RA*cosDE (pmur) (pos.pm;pos.eq.ra)
pmer 2.1 mas/yr rms uncertainty on pmRA (pmer) (stat.error;pos.pm;pos.eq.ra)
pmud 2.1 mas/yr UCAC/Gaia proper motion in DE (pmud) (pos.pm;pos.eq.dec)
pmed 1.4 mas/yr rms uncertainty on pmDE (pmed) (stat.error;pos.pm;pos.eq.dec)
gmag13.064 mag Gaia G magnitude (gmag) (phot.mag;em.opt.R)
umag13.452 mag Means UCAC model magnitude (umag) (phot.mag;em.opt)
rmag12.880 mag Photographic R magnitude from NOMAD (rmag) (phot.mag;em.opt.R)
jmag11.715 mag 2MASS J magnitude (jmag) (phot.mag;em.IR.J)
hmag11.252 mag 2MASS H magnitude (hmag) (phot.mag;em.IR.H)
kmag11.153 mag 2MASS K magnitude (kmag) (phot.mag;em.IR.K)
  
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