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(The bold columns are indexed columns)
Column NameDescriptionDatatype
astorefReference flag for astrometry: this flag indicates that the astrometric parameters in H3-4 and H8-30 refer to: A to Z: the letter indicates the component of a double or multiple system *: the photocentre of a double or multiple system +: the centre of massCHAR
b_vJohnson B-V colourREAL
bdBonner DM , VARCHAR(n)
btmagMean BT magnitudeREAL
catalog[H] Catalogue (H=Hipparcos)CHAR
ccdmCCDM identifier; the flag takes the following values:
H : determined multiple by Hipparcos, previously unknown
I : system previously identified as multiple in HIC (annex1)
M : miscellaneous (system identified after publication of HIC)
VARCHAR(n)
chart[DG] Identification Chart: the chart was produced:
D : from the STScI Digitized Sky Survey
G : from the Guide Star Catalog
CHAR
codCordoba Durchmusterung (DM) VARCHAR(n)
combmagFlag for combined Vmag, B-V, V-ICHAR
cpdCape Photographic DM VARCHAR(n)
de_raCorrelation, DE/RA*cos(delta)REAL
dedegDeclination in deg ' ", ICRS (J1991.25): right ascension and declination are expressed in degrees for epoch J1991.25 (JD2448349.0625 (TT)) in the ICRS (International Celestial Reference System, consistent with J2000) reference system. There are 263 cases where these fields are missing (no astrometric solution could be found)DOUBLE
dedmsDeclination in deg ' ", ICRS (J1991.25)VARCHAR(n)
dhpMagnitude difference of componentsREAL
e_b_vStandard error on B-VREAL
e_btmagStandard error on BTmagREAL
e_dedegStandard error in DE; The standard errors refer to the epoch J1991.25, and represent a minimum of the error on the position. The actual standard error on the positions is increasing for epochs increasingly differing from the nominal J1991.25 epoch.REAL
e_dhpStandard error on dHpREAL
e_hpmagStandard error on HpmagREAL
e_plxStandard error in PlxREAL
e_pmdeStandard error in pmDEREAL
e_pmraStandard error in pmRAREAL
e_radegStandard error in RA*cos(DEdeg); The standard errors refer to the epoch J1991.25, and represent a minimum of the error on the position. The actual standard error on the positions is increasing for epochs increasingly differing from the nominal J1991.25 epoch.REAL
e_rhoStandard error on rhoREAL
e_v_iStandard error on V-IREAL
e_vtmagStandard error on VTmagREAL
elatEcliptic LatitudeDOUBLE
elonEcliptic LongitudeDOUBLE
f1Percentage of rejected dataSMALLINT
f2Goodness-of-fit parameter:values exceeding +3 indicate a bad fit to the dataREAL
glatGalactic LatitudeDOUBLE
glonGalactic LongitudeDOUBLE
hd[1/359083]? HD number INTEGER
hipIdentifier (HIP number)INTEGER
hip2HIP number (repetition)INTEGER
hpmagMedian magnitude in Hipparcos systemREAL
hpmaxHpmag at maximum (5th percentile)REAL
hpminHpmag at minimum (95th percentile)REAL
hpscatScatter on HpmagREAL
hvartype[CDMPRU]? variability type: Hipparcos-defined type of variability (a blank entry signifies that the entry could not be classified as variable or constant):
C : no variability detected ("constant")
D : duplicity-induced variability
M : possibly micro-variable (amplitude < 0.03mag)
P : periodic variable
R : V-I colour index was revised due to variability analysis
U : unsolved variable which does not fall in the other categories
CHAR
m_btmagReference flag for BT and VTmag: this flag indicates the component or combined photometry: A to Z : the letter indicates the component measured in Tycho (non-single star) * : the photometry refers to all components of the Hipparcos entry * - : single-pointing triple or quadruple systemCHAR
m_hipComponent identifiersVARCHAR(n)
m_hpmag[A-Z*-] Reference flag for Hpmag: this flag indicates for double or multiple entries:
A to Z : the letter indicates the specified component measured
* : combined Hpmag of a double system, corrected for attenuation
* - : combined Hpmag of a multiple system, not corrected for attenuation
CHAR
morephoto[ABC] Light curve AnnexCHAR
morevar[12] Additional data about variability; more data about periodic variability are providedSMALLINT
multflag[CGOVX] Double/Multiple Systems flag; indicates that further details are given in the Double
and Multiple Systems Annex:
C : solutions for the components
G : acceleration or higher order terms
O : orbital solutions
V : variability-induced movers (apparent motion arises from variability)
X : stochastic solution (probably astrometric binaries with short period)
CHAR
n_ccdm[HIM] Historical status flagCHAR
ncompNumber of components in this entrySMALLINT
notes[DGPWXYZ] Existence of notes: the flag has the following meaning:
D : double and multiple systems note only (note in hd_notes.doc file)
G : general note only (note in hg_notes.doc file)
P : photometric notes only (note in hp_notes.doc file)
W : D + P
X : D + G
Y : G + P
Z : D + G + P
CHAR
nsysNumber of entries with same CCDMSMALLINT
o_hpmagNumber of observations for HpmagSMALLINT
periodVariability period (days)REAL
plxTrigonometric parallaxREAL
plx_deCorrelation, Plx/DEREAL
plx_raCorrelation, Plx/RA*cos(delta)REAL
pmdeProper motion mu_delta, ICRS epoch J1991.25DOUBLE
pmde_deCorrelation, pmDE/DEREAL
pmde_plxCorrelation, pmDE/PlxREAL
pmde_pmraCorrelation, pmDE/pmRAREAL
pmde_raCorrelation, pmDE/RA*cos(delta)REAL
pmraProper motion mu_alpha.cos(delta), ICRS epoch J1991.25REAL
pmra_deCorrelation, pmRA/DEREAL
pmra_plxCorrelation, pmRA/PlxREAL
pmra_raCorrelation, pmRA/RA*cos(delta)REAL
proxy[HT] Proximity flag this flag provides a coarse indication of the presence of nearby objects within 10arcsec of the given entry. If non-blank, it indicates that 'H' there is one or more distinct Hipparcos Catalogue entries, or distinct components of system from h_dm_com.dat 'T' there is one or more distinct Tycho entries If 'H' and 'T' apply, 'H' is adopted. The 'T' flag implies either an inconsistency between the Hipparcos and Tycho catalogues, or a deficiency in one or both of the catalogues.CHAR
qual[ABCDS] Solution quality: Reliability of the double or multiple star solution:
A=good, B=fair, C=poor, D=uncertain, S=suspected non-single
CHAR
r_b_vSource of B-V from [G]round or [T]ychoCHAR
r_sptype[1234GKSX] Source of spectral type: the flag indicates the source, as:
1 : Michigan catalogue for the HD stars, vol. 1 (Houk+, 1975)
2 : Michigan catalogue for the HD stars, vol. 2 (Houk, 1978)
3 : Michigan Catalogue for the HD stars, vol. 3 (Houk, 1982)
4 : Michigan Catalogue for the HD stars, vol. 4 (Houk+, 1988)
G : updated after publication of the HIC
K : General Catalog of Variable Stars, 4th Ed. (Kholopov+ 1988)
S : SIMBAD data-base
X : Miscellaneous
A blank entry has no corresponding information.
REAL
r_v_iSource of V-I; the origin of the V-I colour, in summary:
'A' for an observation of V-I in Cousins' system;
'B' to 'K' when V-I derived from measurements in other
bands/photoelectric systems
'L' to 'P' when V-I derived from Hipparcos and Star Mapper photometry
'Q' for long-period variables
'R' to 'T' when colours are unknown
CHAR
r_vmagSource of magnitude (G = ground-based, H=HIP, T=Tycho)CHAR
radegalpha, degrees (ICRS, Epoch=J1991.25):right ascension and declination are expressed in degrees for epoch J1991.25 (JD2448349.0625 (TT)) in the ICRS (International Celestial Reference System, consistent with J2000) reference system. There are 263 cases where these fields are missing (no astrometric solution could be found)DOUBLE
rahmsRight ascension in h m s, ICRS (J1991.25)VARCHAR(n)
random_idRandom ID in the range 0.0 => 100.0REAL
rhoAngular separation between componentsREAL
source[PFILS] Astrometric source flag : qualifies the source of the astrometric parameters H8-30
with a 'C' in MultFlag:
P : primary target of a 2- or 3-pointing system
F : secondary or tertiary of a 2- or 3-pointing 'fixed' system
(common parallax and proper motions)
I : secondary or tertiary of a 2- or 3-pointing 'independent' system
(no constraints on parallax or proper motions)
L : secondary or tertiary of a 2- or 3-pointing 'linear' system
(common parallax)
S : astrometric parameters from 'single-star merging' process.
CHAR
sptypeSpectral typeREAL
survey[S] Flag indicating a Survey StarCHAR
thetaPosition angle between componentsSMALLINT
v_iColour index in Cousins' systemREAL
v_i_redV-I used for reductionsREAL
varflagCoarse variability flag (1: < 0.06mag ; 2: 0.06-0.6mag ; 3: >0.6mag)SMALLINT
vmagMagnitude in Johnson VREAL
vtmagMean VT magnitudeREAL