Iota Horologii
Proper names: Iota Horologii
Catalog numbers:
Gliese (Gl) 108, Henry Draper (HD) 17051, Cordoba Durchmusterung (CD) -51°641 , Hipparcos Input Catalog (HIC) 12653, Smithsonian Astrophysical Observatory (SAO) 232864, Hoffleit Bright Star (HR) 810
Arity: singular
Points of interest:
On June 29, 1999, Kürster et al. announced the discovery of a 2.26+ Jupiter-mass planet (now named Iota Horologii b) in an Earthlike orbit around this star, with an orbital period of 320 days and an eccentricity of 0.16.
Right Ascension and Declination: 2h42m33.499s, -50°48'1.32" (epoch 2000.0)
Distance from Sol: 56.24 light-years (17.24 parsecs)
Standard error in distance: 0.9394%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: 26.97, 23.15, -43.58
Galactic (X,Y,Z) coordinates in ly: -0.943, -29.58, -47.82
Proper motion: 0.405 arcsec/yr (56.4° from north)
Radial Velocity: 15.5 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -31.70, -16.66, -7.301
What do all these fields mean?
Spectral class: G3
Luminosity Class: IV
Apparent visual magnitude: +5.40
Absolute visual magnitude: +4.22
Visual luminosity: 1.791 x Sol
Color indices: B-V= +0.56
Diameter: 1.538 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 1.338 A.U.s
Angular size of star in sky in CZ: 0.612625 degrees
Detected companions: 1
Companion b:
Mass: 2.26 x Jupiter, minimum
Standard error in mass: 7.96%
Period: 320.1 days
Standard Error in period: 0.656%
Semimajor Axis: 0.925 A.U.s
Eccentricity: 0.161
Periastron distance: 0.776075 A.U.s
Apastron distance: 1.07393 A.U.s
Source for orbit data: Kürster et al.
Data for this star system were most recently updated on 17-April-2006.