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 M_J 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.

HD 89307 b

Discovery
Discovered by	Marcy et al.?
Discovery site	United States
Discovery date	December 26, 2004
Detection method	radial velocity
Orbital characteristics
Apastron	4.02 AU (601,000,000 km)
Periastron	2.54 AU (380,000,000 km)
Semi-major axis	3.28 AU (491,000,000 km)
Eccentricity	0.23 ± 0.18
Orbital period (sidereal)	2159 ± 70 d 5.911 y
Average orbital speed	16.6
Time of periastron	2,452,370 ± 250
Argument of periastron	10.5
Semi-amplitude	31.0 ± 4.9
Star	HD 89307

References

• Butler; et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal. 646 (1): 505–522. arXiv:astro-ph/0607493. Bibcode:2006ApJ...646..505B. doi:10.1086/504701. Archived from the original on 2019-12-07. Retrieved 2009-03-11.

External links

• "Notes for planet HD 89307 b". The Extrasolar Planets Encyclopaedia. Retrieved 2008-08-18.
• "HD 89307". Exoplanets. Archived from the original on 2009-11-24. Retrieved 2008-08-18.

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