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I/239/tyc_main The Hipparcos and Tycho Catalogues (ESA 1997)
The main part of Tycho Catalogue
timeSerie
(1058332 rows)
  TYC===1631 1785 1
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Note: Note that the errors on the proper motions are large (∼50mas/yr), and therefore the positions computed at an epoch different from 1991.25 have a large (∼0.4") uncertainty.
The Tycho Epoch Photometry data can be accessed from the morePhoto column (includes VT, BT and Hp photometric data for Hipparcos stars [filter responses]

ColumnValue  Explain   (UCD)
_RAJ200020 20 08.7477696 "h:m:s" Right ascension (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.ra)
_DEJ2000+16 43 53.893560 "d:m:s" Declination (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.dec)
_RAB195020 17 51.3875736 "h:m:s" Right ascension (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.ra)
_DEB1950+16 34 22.616661 "d:m:s" Declination (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.dec)
_Glon058.3297347969 deg Galactic longitude at Epoch=J1991.25, proper motions taken into account (pos.galactic.lon)
_Glat-10.9788761047 deg Galactic latitude at Epoch=J1991.25, proper motions taken into account (pos.galactic.lat)
146792recno 146792  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

TYC1631 1785 1  (i) TYC1-3 (TYC number) (Note T1)   (meta.id;meta.main)
Proxy    [HT] Proximity flag (T2) (meta.code)
RAhms20 20 08.75  Right ascension in h m s, ICRS (J1991.25) (T3) (pos.eq.ra)
DEdms+16 43 53.9  Declination in deg ' ", ICRS (J1991.25) (T4) (pos.eq.dec)
Vmag10.70 mag Magnitude in Johnson V (T5) (phot.mag;em.opt.V)
r_Vmag    [BDTV] Source of magnitude (Note T7)   (meta.ref;pos.frame)
RAICRS305.03644904 deg (i) alpha, degrees (ICRS, Epoch=J1991.25) (Note T8)   (pos.eq.ra)
DEICRS+16.73163710 deg (i) delta, degrees (ICRS, Epoch=J1991.25) (Note T9)   (pos.eq.dec)
AstroRefX   [X] Reference flag for astrometry (Note T10)   (meta.bib)
Plx  mas Trigonometric parallax (Note T11)   (pos.parallax.trig)
pmRA  mas/yr Proper motion mu_alpha.cos(delta), ICRS (Note T12)   (pos.pm;pos.eq.ra)
pmDE  mas/yr Proper motion mu_delta, ICRS (Note T13)   (pos.pm;pos.eq.dec)
e_RAICRS200.00 mas Standard error in RA*cos(delta) (Note T14)   (stat.error;pos.eq.ra)
e_DEICRS200.00 mas Standard error in DE (Note T15)   (stat.error;pos.eq.dec)
e_Plx  mas Standard error in Plx (Note T16)   (stat.error;pos.parallax)
e_pmRA  mas/yr Standard error in pmRA (Note T17)   (stat.error;pos.pm;pos.eq.ra)
e_pmDE  mas/yr Standard error in pmDE (Note T18)   (stat.error;pos.pm;pos.eq.dec)
DE:RA    [-1/1] Correlation, DE/RA*cos(delta) (T19) (stat.correlation)
Plx:RA    [-1/1] Correlation, Plx/RA*cos(delta) (T20) (stat.correlation)
Plx:DE    [-1/1] Correlation, Plx/DE (T21) (stat.correlation)
pmRA:RA    [-1/1] Correlation, pmRA/RA*cos(delta) (T22) (stat.correlation)
pmRA:DE    [-1/1] Correlation, pmRA/DE (T23) (stat.correlation)
pmRA:Plx    [-1/1] Correlation, pmRA/Plx (T24) (stat.correlation)
pmDE:RA    [-1/1] Correlation, pmDE/RA*cos(delta) (T25) (stat.correlation)
pmDE:DE    [-1/1] Correlation, pmDE/DE (T26) (stat.correlation)
pmDE:Plx    [-1/1] Correlation, pmDE/Plx (T27) (stat.correlation)
pmDE:pmRA    [-1/1] Correlation, pmDE/pmRA (T28) (stat.correlation)
Nastro    Number of transits for astrometry (T29) (meta.number)
F2    Goodness-of-fit parameter (Note T30)   (stat.fit.goodness)
HIP   (i) Hipparcos HIP number (T31) (meta.id)
BTmag12.138 mag Mean BT magnitude (T32) (phot.mag;em.opt.B)
e_BTmag 0.243 mag Standard error in BTmag (T33) (stat.error;phot.mag;em.opt.B)
VTmag10.821 mag Mean VT magnitude (T34) (phot.mag;em.opt.V)
e_VTmag 0.115 mag Standard error in VTmag (T35) (stat.error;phot.mag;em.opt.V)
r_BTmagN   [DMNT] Source of photometry (Note T36)   (meta.ref)
B-V 1.117 mag Johnson B-V colour (T37) (phot.color;em.opt.B;em.opt.V)
e_B-V 0.263 mag Standard error on B-V (T38) (stat.error;phot.color;em.opt.B)
Q9   Astrometric quality flag, Q (Note T40)   (meta.code.qual)
Fs    Signal-to-noise ratio of the star image(T41) (meta.note)
SourceR   [HPR] Source of astrometric data (Note T42)   (meta.bib)
Nphoto 70   Number of transits for photometry (T43) (meta.number)
VTscat 0.742 mag Estimate of VTmag scatter (T44) (stat.error)
VTmax10.08 mag VTmag at maximum (15th percentile) (T45) (phot.mag;em.opt.V)
VTmin12.45 mag VTmag at minimum (85th percentile) (T46) (phot.mag;em.opt.V)
VarG   [GN] Known variability from GCVS/NSV (Note T47)   (meta.code;src.var)
VarFlag    [UVW] Variability from Tycho (Note T48)   (src.var)
MultFlagZ   [DRSYZ] Duplicity from Tycho (Note T49)   (meta.code.multip)
morePhotoA  Annex of Tycho Epoch photometry A or B, set to - for inaccessible B epoch photometry, b for reconstructed epoch photometry, c for added epoch photometry (meta.code)
m_HIP   CCDM component identifier (T51) (meta.code.multip)
PPM    [1/789676] PPM and Supplement (Note T52)   (meta.id.cross)
HD193538   [1/359083] HD cat. III/135 (T53) (meta.id.cross)
BD   Bonner DM I/119, I/122 (T54) (meta.id.cross)
CoD   Cordoba DM I/114 (T55) (meta.id.cross)
CPD   Cape Photographic DM I/108 (T56) (meta.id.cross)
Remark    [JKLM] Notes (Note T57)   (meta.note)

EpPhotEpPhot  Tycho (and Hipparcos) Epoch Photometry, directly available for A, B and b types (meta.ref.url)
_RA.icrs305.03644904 deg (i) Right Ascension (ICRS, epoch 2000) computed by CDS (pos.eq.ra)
_DE.icrs+16.73163710 deg (i) Declination (ICRS, epoch 2000) computed by CDS (pos.eq.dec)
  
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