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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===8645 2263 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)
_RAJ200012 15 08.7148993 "h:m:s" Right ascension (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.ra)
_DEJ2000-58 44 56.132878 "d:m:s" Declination (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.dec)
_RAB195012 12 28.6064243 "h:m:s" Right ascension (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.ra)
_DEB1950-58 28 14.936572 "d:m:s" Declination (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.dec)
_Glon298.2290321726 deg Galactic longitude at Epoch=J1991.25, proper motions taken into account (pos.galactic.lon)
_Glat+03.7910642907 deg Galactic latitude at Epoch=J1991.25, proper motions taken into account (pos.galactic.lat)
935435recno 935435  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

TYC8645 2263 1  (i) TYC1-3 (TYC number) (Note T1)   (meta.id;meta.main)
Proxy    [HT] Proximity flag (T2) (meta.code)
RAhms12 15 08.76  Right ascension in h m s, ICRS (J1991.25) (T3) (pos.eq.ra)
DEdms-58 44 56.0  Declination in deg ' ", ICRS (J1991.25) (T4) (pos.eq.dec)
Vmag 2.79 mag Magnitude in Johnson V (T5) (phot.mag;em.opt.V)
r_Vmag    [BDTV] Source of magnitude (Note T7)   (meta.ref;pos.frame)
RAICRS183.78648777 deg (i) alpha, degrees (ICRS, Epoch=J1991.25) (Note T8)   (pos.eq.ra)
DEICRS-58.74890198 deg (i) delta, degrees (ICRS, Epoch=J1991.25) (Note T9)   (pos.eq.dec)
AstroRef    [X] Reference flag for astrometry (Note T10)   (meta.bib)
Plx 7.80 mas Trigonometric parallax (Note T11)   (pos.parallax.trig)
pmRA -37.50 mas/yr Proper motion mu_alpha.cos(delta), ICRS (Note T12)   (pos.pm;pos.eq.ra)
pmDE -9.80 mas/yr Proper motion mu_delta, ICRS (Note T13)   (pos.pm;pos.eq.dec)
e_RAICRS 0.90 mas Standard error in RA*cos(delta) (Note T14)   (stat.error;pos.eq.ra)
e_DEICRS 1.00 mas Standard error in DE (Note T15)   (stat.error;pos.eq.dec)
e_Plx 1.40 mas Standard error in Plx (Note T16)   (stat.error;pos.parallax)
e_pmRA 1.10 mas/yr Standard error in pmRA (Note T17)   (stat.error;pos.pm;pos.eq.ra)
e_pmDE 1.10 mas/yr Standard error in pmDE (Note T18)   (stat.error;pos.pm;pos.eq.dec)
DE:RA 0.15   [-1/1] Correlation, DE/RA*cos(delta) (T19) (stat.correlation)
Plx:RA-0.28   [-1/1] Correlation, Plx/RA*cos(delta) (T20) (stat.correlation)
Plx:DE 0.14   [-1/1] Correlation, Plx/DE (T21) (stat.correlation)
pmRA:RA-0.11   [-1/1] Correlation, pmRA/RA*cos(delta) (T22) (stat.correlation)
pmRA:DE 0.09   [-1/1] Correlation, pmRA/DE (T23) (stat.correlation)
pmRA:Plx 0.03   [-1/1] Correlation, pmRA/Plx (T24) (stat.correlation)
pmDE:RA 0.05   [-1/1] Correlation, pmDE/RA*cos(delta) (T25) (stat.correlation)
pmDE:DE 0.01   [-1/1] Correlation, pmDE/DE (T26) (stat.correlation)
pmDE:Plx 0.07   [-1/1] Correlation, pmDE/Plx (T27) (stat.correlation)
pmDE:pmRA 0.24   [-1/1] Correlation, pmDE/pmRA (T28) (stat.correlation)
Nastro226   Number of transits for astrometry (T29) (meta.number)
F2-0.85   Goodness-of-fit parameter (Note T30)   (stat.fit.goodness)
HIP 59747  (i) Hipparcos HIP number (T31) (meta.id)
BTmag 2.534 mag Mean BT magnitude (T32) (phot.mag;em.opt.B)
e_BTmag 0.002 mag Standard error in BTmag (T33) (stat.error;phot.mag;em.opt.B)
VTmag 2.755 mag Mean VT magnitude (T34) (phot.mag;em.opt.V)
e_VTmag 0.002 mag Standard error in VTmag (T35) (stat.error;phot.mag;em.opt.V)
r_BTmagM   [DMNT] Source of photometry (Note T36)   (meta.ref)
B-V-0.194 mag Johnson B-V colour (T37) (phot.color;em.opt.B;em.opt.V)
e_B-V 0.002 mag Standard error on B-V (T38) (stat.error;phot.color;em.opt.B)
Q1   Astrometric quality flag, Q (Note T40)   (meta.code.qual)
Fs15.5   Signal-to-noise ratio of the star image(T41) (meta.note)
Source    [HPR] Source of astrometric data (Note T42)   (meta.bib)
Nphoto203   Number of transits for photometry (T43) (meta.number)
VTscat 0.020 mag Estimate of VTmag scatter (T44) (stat.error)
VTmax 2.74 mag VTmag at maximum (15th percentile) (T45) (phot.mag;em.opt.V)
VTmin 2.78 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)
VarFlagW   [UVW] Variability from Tycho (Note T48)   (src.var)
MultFlagY   [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)
PPM340824   [1/789676] PPM and Supplement (Note T52)   (meta.id.cross)
HD106490   [1/359083] HD cat. III/135 (T53) (meta.id.cross)
BD   Bonner DM I/119, I/122 (T54) (meta.id.cross)
CoDC-58 4466  Cordoba DM I/114 (T55) (meta.id.cross)
CPDP-58 4189  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.icrs183.78631208 deg (i) Right Ascension (ICRS, epoch 2000) computed by CDS (pos.eq.ra)
_DE.icrs-58.74892580 deg (i) Declination (ICRS, epoch 2000) computed by CDS (pos.eq.dec)
  
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