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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===6791 256 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)
_RAJ200016 00 42.4187260 "h:m:s" Right ascension (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.ra)
_DEJ2000-29 55 16.911914 "d:m:s" Declination (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.dec)
_RAB195015 57 35.1481911 "h:m:s" Right ascension (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.ra)
_DEB1950-29 46 50.313251 "d:m:s" Declination (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.dec)
_Glon344.7612493661 deg Galactic longitude at Epoch=J1991.25, proper motions taken into account (pos.galactic.lon)
_Glat+17.1869274670 deg Galactic latitude at Epoch=J1991.25, proper motions taken into account (pos.galactic.lat)
701212recno 701212  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

TYC6791 256 1  (i) TYC1-3 (TYC number) (Note T1)   (meta.id;meta.main)
Proxy    [HT] Proximity flag (T2) (meta.code)
RAhms16 00 42.36  Right ascension in h m s, ICRS (J1991.25) (T3) (pos.eq.ra)
DEdms-29 55 16.5  Declination in deg ' ", ICRS (J1991.25) (T4) (pos.eq.dec)
Vmag10.19 mag Magnitude in Johnson V (T5) (phot.mag;em.opt.V)
r_Vmag    [BDTV] Source of magnitude (Note T7)   (meta.ref;pos.frame)
RAICRS240.17648529 deg (i) alpha, degrees (ICRS, Epoch=J1991.25) (Note T8)   (pos.eq.ra)
DEICRS-29.92126015 deg (i) delta, degrees (ICRS, Epoch=J1991.25) (Note T9)   (pos.eq.dec)
AstroRef    [X] Reference flag for astrometry (Note T10)   (meta.bib)
Plx -99.30 mas Trigonometric parallax (Note T11)   (pos.parallax.trig)
pmRA 92.50 mas/yr Proper motion mu_alpha.cos(delta), ICRS (Note T12)   (pos.pm;pos.eq.ra)
pmDE -42.90 mas/yr Proper motion mu_delta, ICRS (Note T13)   (pos.pm;pos.eq.dec)
e_RAICRS 25.50 mas Standard error in RA*cos(delta) (Note T14)   (stat.error;pos.eq.ra)
e_DEICRS 24.80 mas Standard error in DE (Note T15)   (stat.error;pos.eq.dec)
e_Plx 43.30 mas Standard error in Plx (Note T16)   (stat.error;pos.parallax)
e_pmRA 42.40 mas/yr Standard error in pmRA (Note T17)   (stat.error;pos.pm;pos.eq.ra)
e_pmDE 49.70 mas/yr Standard error in pmDE (Note T18)   (stat.error;pos.pm;pos.eq.dec)
DE:RA-0.24   [-1/1] Correlation, DE/RA*cos(delta) (T19) (stat.correlation)
Plx:RA-0.13   [-1/1] Correlation, Plx/RA*cos(delta) (T20) (stat.correlation)
Plx:DE-0.06   [-1/1] Correlation, Plx/DE (T21) (stat.correlation)
pmRA:RA 0.08   [-1/1] Correlation, pmRA/RA*cos(delta) (T22) (stat.correlation)
pmRA:DE-0.01   [-1/1] Correlation, pmRA/DE (T23) (stat.correlation)
pmRA:Plx-0.65   [-1/1] Correlation, pmRA/Plx (T24) (stat.correlation)
pmDE:RA-0.10   [-1/1] Correlation, pmDE/RA*cos(delta) (T25) (stat.correlation)
pmDE:DE 0.58   [-1/1] Correlation, pmDE/DE (T26) (stat.correlation)
pmDE:Plx 0.06   [-1/1] Correlation, pmDE/Plx (T27) (stat.correlation)
pmDE:pmRA-0.17   [-1/1] Correlation, pmDE/pmRA (T28) (stat.correlation)
Nastro186   Number of transits for astrometry (T29) (meta.number)
F2 0.75   Goodness-of-fit parameter (Note T30)   (stat.fit.goodness)
HIP   (i) Hipparcos HIP number (T31) (meta.id)
BTmag12.321 mag Mean BT magnitude (T32) (phot.mag;em.opt.B)
e_BTmag 0.168 mag Standard error in BTmag (T33) (stat.error;phot.mag;em.opt.B)
VTmag10.380 mag Mean VT magnitude (T34) (phot.mag;em.opt.V)
e_VTmag 0.045 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 1.618 mag Johnson B-V colour (T37) (phot.color;em.opt.B;em.opt.V)
e_B-V 0.173 mag Standard error on B-V (T38) (stat.error;phot.color;em.opt.B)
Q4   Astrometric quality flag, Q (Note T40)   (meta.code.qual)
Fs10.7   Signal-to-noise ratio of the star image(T41) (meta.note)
Source    [HPR] Source of astrometric data (Note T42)   (meta.bib)
Nphoto229   Number of transits for photometry (T43) (meta.number)
VTscat 0.521 mag Estimate of VTmag scatter (T44) (stat.error)
VTmax 9.85 mag VTmag at maximum (15th percentile) (T45) (phot.mag;em.opt.V)
VTmin11.54 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)
VarFlagU   [UVW] Variability from Tycho (Note T48)   (src.var)
MultFlagR   [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)
PPM732481   [1/789676] PPM and Supplement (Note T52)   (meta.id.cross)
HD    [1/359083] HD cat. III/135 (T53) (meta.id.cross)
BD   Bonner DM I/119, I/122 (T54) (meta.id.cross)
CoDC-29 12172  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.icrs240.17674469 deg (i) Right Ascension (ICRS, epoch 2000) computed by CDS (pos.eq.ra)
_DE.icrs-29.92136442 deg (i) Declination (ICRS, epoch 2000) computed by CDS (pos.eq.dec)
  
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