NOTABLE STARS A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z                    HOME ABOUT CATEGORIES SITE MAP COPYRIGHT ADVERTISE CONTACT entire Web this site Iota Horologii Dust disk around Iota Horologii Also known as HR 810, a Sun-like star with an extrasolar planet that moves in the most Earth-like orbit yet found. Host star Distance 50.5 light-years (15.5 pc) Spectral type G0 V Apparent magnitude 5.4 Planet Mass (Jupiter=1) 2.26 Semi-major axis 0.93 AU (140 million km, 86 million miles) Orbital period 320 days Eccentricity 0.16 Discovery 1999, ESO Coudé Échelle Spectrometer, La Silla Method of discovery radial velocity Related categories    • NOTABLE STARS    • EXTRASOLAR PLANETS Also on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History Transport Concepts & Designs (partner site) BACK TO TOP