Saturday, September 13, 2008


Star type
g G0 IV

Distance from Earth
g 37.48038 ly

Star Service No.
g NA

g 2.4 to 2.7 billion years old

Diameter/Mass/Temp (xSol)
g 270%; 165%; 6100 K

Brightness (xSol)
g 890%

g 140%-200%

Comparison to Sol
g NA

Picture of star
g See picture

Star system features
g May have an unseen, close spectroscopic companion, which could be a very dim M7 red dwarf star or a white dwarf stellar remnant; if so, it has an orbital period of 1.35 years with the two separated by about the distance between Mars and the Sun
g Star just beginning to make the transition to becoming a red giant

Known planets
g NA

Habitable zone
g An Earth-type planet could have liquid water in a stable orbit centered around 3.0 AU, between the orbital distances of Earth and Mars in the Solar System. Such a planet would have an orbital period around 4.0 years (1,456 days).

Orbital map
g NA

View from star
g See sky map

Nearby stars
(Star systems with 10 light years)
g Arcturus: 3.3 ly (K1.5 IIIp)
g GJ 1179 AB: 4.3 ly
g Wolf 497: 5.7 ly
g BD+17 2611 AB: 5.9 ly (K1-2 V; M1 V)
g Hip 67593: 6.9 ly
g Ross 837: 7.1 ly
g AC+18 1204-96 AB: 8.8 ly
g BD+19 2881 AB: 9.1 ly (K2 V; ?)
g DT Virginis: 9.3 ly
g Ross 52 AB: 9.7 ly
g BD+27 2296 AB: 9.8 ly (K2-4 V; K6 V)
g CD Bootis AB: 10 ly
g Beta Comae Berenices: 11 ly (F9,5-G0 V)
g Diadem 3: 12 ly (F5 V; F5 V; ?)
g Tau Boötis 2: 14 ly (F7 V; M2 V)
g Xi Boötis 2: 16 ly (G8 Ve; K4-5 Ve)
g Sigma Bootis A?: 17 ly (F3 Vw)
g Porrima 3: 18 ly (F0 V; F0 V; ?)
g HR 5273 AB: 18 ly (G8 V)
g Chara: 18 ly (G0V)
g Gamma Serpentis 2?: 18 ly (F6 V; ?)
g Denebola: 19 ly
g Lambda Serpentis 2: 19 ly (G0 V; ?)

Map locating star system
g See map (listed as Eta Boo)

Location in Earth sky
g In the southeast corner of of Constellation Boötes, the Herdsman or Bear Driver, west of Arcturus, south Globular Cluster M3 (NGC 5272), east of Globular Cluster M53, and northeast of Nu Boötis

Other names
g HD 121370; HIP 67927l; BD +19° 2725; YPC 3175.00; Gl 534; Eta Boo; 8 Boo A; Murfid; HR 5235; SAO 100766; FK5 513; LTT 14060; USNO 849; eta Bootis

Sci-fi mentions
g NA

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