HD 231701 b

HD 231701 b
Exoplanet List of exoplanets
Parent star
Star HD 231701
Constellation Sagitta
Right ascension (α) 19h 32m 04.1611s
Declination (δ) +16° 28 27.444
Distance353.6 ly
(108.4 pc)
Spectral type F8V
Orbital elements
Semi-major axis(a) 0.55 AU
Periastron (q) 0.45 AU
Apastron (Q) 0.65 AU
Eccentricity (e) 0.19 ± 0.05
Orbital period(P) 142 ± 2.8 d
(0.389 y)
Argument of
periastron
(ω) 117 ± 24°
Time of periastron (T0) 2,453,203±3.2 JD
Semi-amplitude (K) 38.3 m/s
Physical characteristics
Minimum mass(m sin i)1.08 MJ
Discovery information
Discovery date April 10, 2007
Discoverer(s) Fischer et al.
Discovery method Radial velocity
Discovery site United States California, United States
Discovery status Published[1]

HD 231701 b is an extrasolar planet approximately 354 light years away in the constellation of Sagitta. This planet orbits at 0.55 AU from the star HD 231701 with eccentricity 0.19. Based on its high mass of 1.08 MJ, the planet is probably a gas giant, meaning the planet has no solid surface and have composition similar to solar system's outer planets.[1]

References

  1. 1 2 Fischer, Debra A.; et al. (2007). "Five Intermediate-Period Planets from the N2K Sample". The Astrophysical Journal. 669 (2): 1336–1344. arXiv:0704.1191Freely accessible. Bibcode:2007ApJ...669.1336F. doi:10.1086/521869.

External links

Coordinates: 19h 32m 04.1611s, +16° 28′ 27.444″


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