Field Definitions for table NearByStars


If the database maintainer has set up a data dictionary, then this form will show information defining and explaining each field in the table NearByStars. When an asterisk appears following the column data type (like int *) this indicates that this column is indexed in the database server for faster searches.
FieldTypeDescription
sybidint, no nulls
IDchar Object identification, see comment; Gl=Gliese; GJ=Gliese & Jahreiss; Wo=Woolley et al.; NN=newly added stars (not yet numbered)
Dist_Uncchar of the distance, see comment; s trig. parallax > 0.0390 and phot. parallax < 0.0390 x trig. parallax > 0.0390 and phot. parallax < 0.0190 p trig. parallax < 0.0390 and phot. parallax > 0.0390 q trig. parallax < 0.0390 and phot. parallax > 0.0390
RAHint Hours RA, B1950.0; units: h
RAMint Minutes RA, B1950.0; units: min
RASint Seconds RA, B1950.0; units: s
DecSignchar Sign Dec, B1950.0
DecDint Degrees Dec, B1950.0; units: deg
DecMreal Minutes Dec, B1950.0; units: arcmin
PMreal Total proper motion; units: arcsec/yr
PM_Angreal Direction angle of proper motion; units: deg
RadVel_Signchar of radial velocity
RadVelreal Radial velocity; units: km/s
RadVel_Commchar velocity comments; var=variable (?) radial velocity; SB?=suspected spec- troscopic binary; SB=spectroscopic binary
SpTypechar Spectral type or color class
SpType_Codechar source of spectral type, see doc
Magreal Apparent magnitude; units: mag
Mag_Codechar code, see comment; P=photographic; *=photometric; c=calculated or transformed; v=variable; :=uncertain
Mag_JCodechar if joint magnitude
B_Vreal B-V color; units: mag
B_V_Codechar ''c''=calculated; '':''=uncertain
B_V_JCodechar if B-V joint color
U_Breal U-B color; units: mag
U_B_Codechar ''C''=Cape system; '':''=uncertain
U_B_JCodechar if U-B joint color
R_Ireal R-I color (Kron''s system); units: mag
R_I_Codechar for R-I system; C if in Cousins system; t if transformed from another system; ; if uncertain.
R_I_JCodechar if R-I joint color
Parallaxreal parallax; units: arcsec
Par_Errorreal error of trigonometric parallax; units: arcsec
ResParreal Resulting parallax; units: arcsec
ResPar_Errorreal error of resulting parallax; units: arcsec
Par_Codechar code, see doc
Vreal Absolute visual magnitude; units: mag
V_Codechar Visual magnitude code, see Mag_Code
V_JCodechar ''J'' if V a joint magnitude
V_Qualchar Quality of absolute magnitude, see doc
UVel_Signchar of UVel
UVelint U space velocity component in galactic plane
VVel_Signchar of VVel
VVelint V space velocity component in galactic plane
WVel_Signchar of WVel
WVelint W space velocity component in galactic plane
HDint Henry Draper Catalog (HD) number
DM_Catchar Durchmusterung catalog ID, ''BD'', ''CD'', ''CP''
DMchar Durchmusterung catalog number, SZZNNNNNC
Giclaschar Giclas number
LHSchar LHS number
Numberchar Number, see comment; V=Vyssotsky number; U=UGPMF number; W=white dwarf (EG or Gr number)
Remarkschar Additional identifications and remarks

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