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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===2026 1131 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)
_RAJ200015 37 30.7646530 "h:m:s" Right ascension (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.ra)
_DEJ2000+23 16 02.819272 "d:m:s" Declination (FK5, Equinox=J2000.0) at Epoch=J2000, proper motions taken into account (pos.eq.dec)
_RAB195015 35 20.4703948 "h:m:s" Right ascension (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.ra)
_DEB1950+23 25 53.906349 "d:m:s" Declination (FK4, Equinox=B1950.0) at Epoch=J1950, proper motions taken into account (pos.eq.dec)
_Glon036.4954872663 deg Galactic longitude at Epoch=J1991.25, proper motions taken into account (pos.galactic.lon)
_Glat+52.4007860933 deg Galactic latitude at Epoch=J1991.25, proper motions taken into account (pos.galactic.lat)
182216recno 182216  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

TYC2026 1131 1  (i) TYC1-3 (TYC number) (Note T1)   (meta.id;meta.main)
Proxy    [HT] Proximity flag (T2) (meta.code)
RAhms15 37 30.78  Right ascension in h m s, ICRS (J1991.25) (T3) (pos.eq.ra)
DEdms+23 16 03.5  Declination in deg ' ", ICRS (J1991.25) (T4) (pos.eq.dec)
Vmag10.10 mag Magnitude in Johnson V (T5) (phot.mag;em.opt.V)
r_Vmag    [BDTV] Source of magnitude (Note T7)   (meta.ref;pos.frame)
RAICRS234.37826913 deg (i) alpha, degrees (ICRS, Epoch=J1991.25) (Note T8)   (pos.eq.ra)
DEICRS+23.26762577 deg (i) delta, degrees (ICRS, Epoch=J1991.25) (Note T9)   (pos.eq.dec)
AstroRef    [X] Reference flag for astrometry (Note T10)   (meta.bib)
Plx -21.60 mas Trigonometric parallax (Note T11)   (pos.parallax.trig)
pmRA -31.40 mas/yr Proper motion mu_alpha.cos(delta), ICRS (Note T12)   (pos.pm;pos.eq.ra)
pmDE -72.40 mas/yr Proper motion mu_delta, ICRS (Note T13)   (pos.pm;pos.eq.dec)
e_RAICRS 23.90 mas Standard error in RA*cos(delta) (Note T14)   (stat.error;pos.eq.ra)
e_DEICRS 28.00 mas Standard error in DE (Note T15)   (stat.error;pos.eq.dec)
e_Plx 39.10 mas Standard error in Plx (Note T16)   (stat.error;pos.parallax)
e_pmRA 26.30 mas/yr Standard error in pmRA (Note T17)   (stat.error;pos.pm;pos.eq.ra)
e_pmDE 45.30 mas/yr Standard error in pmDE (Note T18)   (stat.error;pos.pm;pos.eq.dec)
DE:RA-0.17   [-1/1] Correlation, DE/RA*cos(delta) (T19) (stat.correlation)
Plx:RA-0.36   [-1/1] Correlation, Plx/RA*cos(delta) (T20) (stat.correlation)
Plx:DE 0.18   [-1/1] Correlation, Plx/DE (T21) (stat.correlation)
pmRA:RA-0.09   [-1/1] Correlation, pmRA/RA*cos(delta) (T22) (stat.correlation)
pmRA:DE 0.11   [-1/1] Correlation, pmRA/DE (T23) (stat.correlation)
pmRA:Plx-0.12   [-1/1] Correlation, pmRA/Plx (T24) (stat.correlation)
pmDE:RA 0.04   [-1/1] Correlation, pmDE/RA*cos(delta) (T25) (stat.correlation)
pmDE:DE-0.13   [-1/1] Correlation, pmDE/DE (T26) (stat.correlation)
pmDE:Plx 0.31   [-1/1] Correlation, pmDE/Plx (T27) (stat.correlation)
pmDE:pmRA-0.12   [-1/1] Correlation, pmDE/pmRA (T28) (stat.correlation)
Nastro117   Number of transits for astrometry (T29) (meta.number)
F2 0.34   Goodness-of-fit parameter (Note T30)   (stat.fit.goodness)
HIP 76506  (i) Hipparcos HIP number (T31) (meta.id)
BTmag11.713 mag Mean BT magnitude (T32) (phot.mag;em.opt.B)
e_BTmag 0.113 mag Standard error in BTmag (T33) (stat.error;phot.mag;em.opt.B)
VTmag10.240 mag Mean VT magnitude (T34) (phot.mag;em.opt.V)
e_VTmag 0.047 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 1.240 mag Johnson B-V colour (T37) (phot.color;em.opt.B;em.opt.V)
e_B-V 0.106 mag Standard error on B-V (T38) (stat.error;phot.color;em.opt.B)
Q4   Astrometric quality flag, Q (Note T40)   (meta.code.qual)
Fs 8.6   Signal-to-noise ratio of the star image(T41) (meta.note)
Source    [HPR] Source of astrometric data (Note T42)   (meta.bib)
Nphoto104   Number of transits for photometry (T43) (meta.number)
VTscat 0.384 mag Estimate of VTmag scatter (T44) (stat.error)
VTmax 9.86 mag VTmag at maximum (15th percentile) (T45) (phot.mag;em.opt.V)
VTmin10.99 mag VTmag at minimum (85th percentile) (T46) (phot.mag;em.opt.V)
Var    [GN] Known variability from GCVS/NSV (Note T47)   (meta.code;src.var)
VarFlag    [UVW] Variability from Tycho (Note T48)   (src.var)
MultFlagY   [DRSYZ] Duplicity from Tycho (Note T49)   (meta.code.multip)
morePhotoB  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)
PPM104177   [1/789676] PPM and Supplement (Note T52)   (meta.id.cross)
HD    [1/359083] HD cat. III/135 (T53) (meta.id.cross)
BDB+23 2833  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.icrs234.37818605 deg (i) Right Ascension (ICRS, epoch 2000) computed by CDS (pos.eq.ra)
_DE.icrs+23.26744980 deg (i) Declination (ICRS, epoch 2000) computed by CDS (pos.eq.dec)
  
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