Sunday, July 15, 2007

Groombridge 34 AB

Star type
g A: M1.5 Vne
g B: M3.5 Vne

Distance from Earth
g 11.64 ly

Star Service No.
g NA

g A: NA
g B: NA

Diameter/Mass/Temp (xSol)
g A: 34%; 48%; NA
g B: 19%; 16.3%; NA

Brightness (xSol)
g A: 64/10,000th
g B: 42/100,000th

g A: NA
g B: NA

Comparison to Sol
g A: NA
g B: NA

Picture of stars
g See picture

Star system features
g Star A and B are separated by an "average" distance of 147 times the Earth-Sun distance (AU) (of a semi-major axis) in a circular orbit (e= 0.00) of about 2,600 years

Known planets
g A: A recent search for faint companions to nearby stars using the Hubble Space Telescope's wide field planetary camera found no evidence of a large Jupiter or brown dwarf sized object (Schroeder et al, 2000).
g B: Ditto

Habitable zone
g A: Accounting for infrared heating, the distance from Star A where an Earth-type planet would be comfortable with liquid water is around 0.25 AU with a period of 13.5 days
g B: Accounting for infrared heating, the distance from Star B where an Earth-type planet would be comfortable with liquid water is around 0.13 AU with a period of 3.8 days

Orbital map
g See orbital map

View from star
g NA

Nearby stars
(Star systems with 10 light years)
g Ross 248: 1.8 ly
g Kruger 60 AB, 4.9 ly
g EV Lacertae AB, 6.2 ly
g 61 Cygni 2AB, 7.1 ly
g Eta Cassiopeiae 2, 8.7 ly
g Teegarden's Star, ~8.9 ly
g L 1159-16, 9 ly
g Van Maanen's Star, 9.1 ly
g Struve 2398 AB, 9.8 ly

Map locating star system
g See stellar map

Location in Earth sky
g North central part of in Constellation Andromeda, the Chained Maiden - northwest of the Andromeda galaxy (M 31) and two of its satellite galaxies (M32 and M110)

Other names
g A: GX Andromedae
g A: Gl 15 A
g A: Hip 1475
g A: HD 1326 A
g A: BD+43 44 A
g A: SAO 36248
g A: LHS 3
g A: LTT 10108
g A: LFT 31
g A: G 171-47
g A: ADS 246 A
g B: GQ Andromedae
g B: Gl 15 B
g B: HD 1326 B
g B: BD+43 44 B
g B: G 171-48
g B: LHS 4
g B: LTT 10109
g B: LFT 32
g B: ADS 246 B

Sci-fi mentions
g Space: Above and Beyond, television series. Groombridge 34 is the location of the largest extrasolar USMC fleet base, and is the expected target of the chigs in the pilot episode (though this intelligence is later revealed to be incorrect). It is also the location of the first part of the episode "Mutiny".
g Macross Plus, OVA anime television series and compilation film. Groombridge 34 is a possible location of the fictitious "Groombridge 1816" (Helios) system, stated to be 11.7 light years from the Solar System, about the same distance as Groombridge 34 (11.62 ly). Planet Eden, located within the Groombridge 1816 system, is the location of the New Edwards Test Flight Center and its major city, Eden City. The name Groombridge 1816 may be an alteration of the name of the real star Groombridge 1618.
g Halo computer game series. The Groombridge 34 system is the site of a decommissioned construction platform. In 2531, a group of Spartan-IIs are sent to investigate rebel activity at the platform.
g Frontier: Elite II and Frontier: First Encounters, computer games. This crowded system has three stars, multiple gas giants and numerous planets. It is also heavily developed, with multiple colonies and space stations present within the system.

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