VizieR

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VizieR

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II/354/tgasext HIP and TGAS stars reddening and extinction (Gontcharov+ 2018)
E(J-Ks), E(B-V), Rv and Av for Gaia DR1 TGAS stars (711237 rows)
  recno=9496
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ColumnValue  Explain   (UCD)
_RAJ200000 20 31.608 "h:m:s" Right ascension (FK5, Equinox=J2000.0) at Epoch=J2015. (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.eq.ra)
_DEJ2000+30 58 30.36 "d:m:s" Declination (FK5, Equinox=J2000.0) at Epoch=J2015. (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.eq.dec)
_RAB195000 17 54.496 "h:m:s" Right ascension (FK4, Equinox=B1950.0) at Epoch=J2015. (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.eq.ra)
_DEB1950+30 41 52.06 "d:m:s" Declination (FK4, Equinox=B1950.0) at Epoch=J2015. (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.eq.dec)
_Glon115.166645 deg Galactic longitude at Epoch=J2015. (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-31.430141 deg Galactic latitude at Epoch=J2015. (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)
9496recno 9496  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

Source2862328865055866240  Source ID (Cat. I/337) (meta.id;meta.main)
HIP 1640   Hipparcos (Cat. I/311) identifier (meta.id)
RA_ICRS005.1317 deg (i) Approximate right ascension (ICRS) at epoch 2015.0 (Note G1)   (pos.eq.ra;meta.main)
DE_ICRS+30.9751 deg (i) Approximate declination (ICRS) at epoch 2015.0 (Note G1)   (pos.eq.dec;meta.main)
GLON115.1667 deg Approximate Galactic longitude at epoch 2015.0 (Note G1)   (pos.galactic.lon)
GLAT-31.4302 deg Approximate Galactic latitude at epoch 2015.0 (Note G1)   (pos.galactic.lat)
E(J-Ks) 0.01 mag [0.00,0.26] E(J-Ks) reddening (Note G2)   (phot.color.excess)
E(B-V) 0.01 mag [0.00,0.43] E(B-V) reddening (Note G3)   (phot.color.excess)
Rv 3.32   [2.01,4.12] Rv total-to-selective extinction ratio (Note G4)   (phys.absorption.gal;arith.ratio)
Av 0.04 mag [0.00,1.24] Av interstellar extinction (Note G5)   (phys.absorption)

SimbadSimbad  ask the Simbad data-base about this object (meta.ref.url)
_RA.icrs005.1317 deg (i) Right Ascension (ICRS, epoch 2000) computed by CDS (pos.eq.ra)
_DE.icrs+30.9751 deg (i) Declination (ICRS, epoch 2000) computed by CDS (pos.eq.dec)
  
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