HD 89307 b

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HD 89307 b
Exoplanet List of exoplanets
Parent star
Star HD 89307
Constellation Leo
Right ascension (α) 10h 18m 21.2877s
Declination (δ) +12° 37′ 15.990″
Distance 108 ly
(33 pc)
Spectral type G0V
Orbital elements
Semi-major axis (a) 3.28 AU
Periastron (q) 2.54 AU
Apastron (Q) 4.02 AU
Eccentricity (e) 0.23 ± 0.18
Orbital period (P) 2159 ± 70 d
(5.911 y)
Orbital speed (υ) 16.6 km/s
Argument of
(ω) 10.5°
Time of periastron (T0) 2,452,370 ± 250 JD
Semi-amplitude (K) 31.0 ± 4.9 m/s
Physical characteristics
Minimum mass (m sin i) 1.92 MJ
Discovery information
Discovery date December 26, 2004
Discoverer(s) Marcy et al.?
Discovery method radial velocity
Discovery site  United States
Discovery status Published[1]

HD 89307 b is an extrasolar planet orbiting the star HD 89307 located approximately 108 light-years away in the constellation of Leo. The planet takes 187 megaseconds to orbit (roughly 2164 days or 5.9 years). The planet’s minimum mass is 1.92 MJ since the inclination is unknown. As it is typical for most of the long-period planets, the eccentricity is greater than any planets in the Solar System, orbiting at the average distance of 491 gigameters. The speed of the wobble caused by the planet’s gravity is 31 meters per second. The average orbital velocity is 16.6 m/s.


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Coordinates: Sky map 10h 18m 21.2877s, +12° 37′ 15.990″