Wednesday, April 23, 2008

Zeta Herculis AB

Star type
g A (aka Aa): F9-G2 IV
g B (aka Ab): K0 V (alt. source says G7)

Distance from Earth
g 32.1762 ly

Star Service No.
g NA

g A: 3.8 Gyr; has just begun to evolve away from the main sequence; its core hydrogen fusion likely has shut down
g B: NA

Radius/Mass/Temp (xSol)
g A: 250%; 114%; 5780 K
g B: 92%; 82%; 5420 K

Brightness (xSol)
g A: 695.9%
g B: 70.2%

g A: NA
g B: NA

Comparison to Sol
g A: NA
g B: NA

Picture of star
g A: NA
g B: NA

Star system features
g This system forms part of the Zeta Herculis moving group of stars; this group includes: δ Trianguli, φ2 Pavonis, ζ Reticuli, 1 Hydrae, Gl 456, Gl 678, and Gl 9079

Known planets
Given closeness of Stars A and B orbit about one another, planets are highly unlikely
g A: NA
g B: NA

Habitable zone
g A: NA
g B: NA

Orbital map
g Stars A and B are separated each other by an average separation of 14.65 AUs and swing as close as 8 AUs and as far away as 21.3 AUs.

View from stars
g NA

Nearby stars
(Star systems with 10 light years)
g NA

Map locating star system
g NA

Location in Earth sky
g In the constellation Hercules, right behind Beta Herculis; looks much like Sol would look like from 32 ly away

Other names
g A: HD 150680; HIP 81693; BD +31° 2884 A; YPC 3799.00; LHS 3234; ZET Her A; ADS 10157; ζ Her; 40 Her; 40 Herculis; GJ 635 A; HR 6212; LTT 14952; GCTP 3799.00; SAO 65485; NSV 07915; WDS 16413+3136; Rutilicus Aa
g B: GJ 635 B; Zeta Herculis Ba; Zet Her Ba; BD+31 2884 B

Sci-fi mentions
g A: In the "Star Trek" universe, known as "Inferna", according to "Star Trek Star Charts". Inferna Prime is a planet in Federation space, where in 2373 the Federation Grand Jury was convened to hear a case concerning the Orion Syndicate, during the "Deep Space Nine" episode "The Ascent".
g B: NA

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