Monday, September 6, 2010

Iota Horologii

Star type
g GO Vp

Distance from Earth
g 56.24 ly

Star Service No.
g NA

g 6.25 billion years (Star formed with the stars of the Hyades cluster but slowly drifted away and is now more than 130 light-years away from its original birthplace.)

Radius/Mass/Temp (xSol)
g 150%; 103%; 6125 K

Brightness (xSol)
g 179.1%

Metallicity (xSol)
g 150%
Comparison to Sol
g NA

Picture of star
g See picture (courtesy Digital Sky Survey/VirGO)

Star system features
g NA

Known planets
g Iota Horologii b: A 224% Jupiter mass planet orbits star every 311.3 days at 0.91 AU
g A planet in an eccentric orbit with a period of approximately 600 days was proposed, however this was not confirmed and it seems likely that the effect was due to activity on Iota Horologii itself.
g In 2000, a dust disc was announced around the star, but this was later determined to be an instrumental artifact.

Habitable zone
g Stability analysis reveals that the orbits of Earth-sized planets located in the planet's Trojan points would be stable for long periods of time. Ranked 69th in the list of candidates for NASA's planned Terrestrial Planet Finder mission.

Orbital map
g NA

View from star
g NA

Nearby stars
(Star systems with 10 light years)
g Chi Eridani (a yellow subgiant): 7 ly (closest star)
g HD 10647 (a yellow dwarf): 9 ly (closest planetary system)
g Epsilon Reticuli (an orange subgiant): 16 ly (second closest planetary system)

Map locating star system
g NA

Location in Earth sky
g In Southern constellation Horologium, near the stars Mu Horologii and R Horologii (though star is not close to them in distance).

Other names
g Gliese 108, HD 17051 HIP 12653, HR 810

Sci-fi mentions
g In Russell Lutz’s novel “Iota Cycle”, Iota Horologii is a setting for colonization and terraforming. It has six planets, the second, Asia, being Iota Horologii b. The planets are named after the continents of Earth, in order from closest to the star: Australia, Asia, Europe, Africa, America, and Antarctica.
g In Michael Puttré’s novel “Outre Mer”, the earthlike moon Outre Mer orbits the gas giant Adonis, the second planet of Iota Horologii. It is populated by human refugees, descendants of adbuctees taken by the Greys, inhabitants of the systems of Zeta Reticuli. The world is also the home of the Duranni, an intelligent aboriginal species.
g In the Halo video game series, Soell is the traditional name given to Iota Horologii, the star that Threshold, Basis and Installation 04 orbit.
g In "Star Trek" universe, is located near Sierra Outpost I on Romulan Neutral Zone

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