VizieR

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VizieR

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II/354/hipext HIP and TGAS stars reddening and extinction (Gontcharov+ 2018)
E(J-Ks), E(B-V), Rv and Av for Hipparcos stars, not in Gaia DR1 TGAS (19259 rows)
  recno=8483
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ColumnValue  Explain   (UCD)
_RAJ200010 27 09.144 "h:m:s" Right ascension (FK5, Equinox=J2000.0) at Epoch=J1991.25 (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)
_DEJ2000-31 04 04.08 "d:m:s" Declination (FK5, Equinox=J2000.0) at Epoch=J1991.25 (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)
_RAB195010 24 51.361 "h:m:s" Right ascension (FK4, Equinox=B1950.0) at Epoch=J1991.25 (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 48 44.99 "d:m:s" Declination (FK4, Equinox=B1950.0) at Epoch=J1991.25 (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)
_Glon269.876888 deg Galactic longitude at Epoch=J1991.25 (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+22.387235 deg Galactic latitude at Epoch=J1991.25 (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)
8483recno 8483  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

HIP 51172  Hipparcos (Cat. I/311) identifier (meta.id)
RA_ICRS156.7881 deg (i) Approximate right ascension (ICRS) at epoch 1991.25 (Note G6)   (pos.eq.ra;meta.main)
DE_ICRS-31.0678 deg (i) Approximate declination (ICRS) at epoch 1991.25 (Note G6)   (pos.eq.dec;meta.main)
GLON269.8769 deg Approximate Galactic longitude at epoch 1991.25 (Note G6)   (pos.galactic.lon)
GLAT 22.3873 deg Approximate Galactic latitude at epoch 1991.25 (Note G6)   (pos.galactic.lat)
E(J-Ks) 0.05 mag [0.00,0.24] E(J-Ks) reddening (Note G7)   (phot.color.excess)
E(B-V) 0.08 mag [0.00,0.40] E(B-V) reddening (Note G3)   (phot.color.excess)
Rv 3.31   [2.16,4.07] Rv total-to-selective extinction ratio (Note G4)   (phys.absorption.gal;arith.ratio)
Av 0.27 mag [0.00,1.15] Av interstellar extinction (Note G5)   (phys.absorption)

SimbadSimbad  ask the Simbad data-base about this object (meta.ref.url)
_RA.icrs156.7881 deg (i) Right Ascension (ICRS, epoch 2000) computed by CDS (pos.eq.ra)
_DE.icrs-31.0678 deg (i) Declination (ICRS, epoch 2000) computed by CDS (pos.eq.dec)
  
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