Astronomy:HD 68988 c

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Short description: Exoplanet in the constellation Ursa Major
HD 68988 c
Discovery
Discovered byWright et al.
Discovery siteCalifornia , United States
Discovery dateNovember 2006
Radial velocity
Orbital characteristics
13.2 AU (1.97×109 km)[1]
Eccentricity0.45+0.130−0.081
Orbital period16100+11000−3500 d[1]
Average Orbital speed14
astron|astron|helion}}2452730 ± 510
129
Semi-amplitude60 ± 11
StarHD 68988
Physical characteristics
Mass15.0+2.8−1.5MJ[1]


HD 68988 c is an exoplanet located approximately 192 light-years away in the constellation of Ursa Major, orbiting the star HD 68988. The parameters including period and eccentricity are highly uncertain. The semimajor axis was initially believed to be 5.32 AU with an orbital period of 4100 ± 7300 days (11 years).[2][3] The planetary orbit was significantly refined in 2021.[1]

See also

References

  1. ↑ 1.0 1.1 1.2 1.3 Rosenthal, Lee J.; Fulton, Benjamin J.; Hirsch, Lea A.; Isaacson, Howard T.; Howard, Andrew W.; Dedrick, Cayla M.; Sherstyuk, Ilya A.; Blunt, Sarah C. et al. (2021), "The California Legacy Survey. I. A Catalog of 178 Planets from Precision Radial Velocity Monitoring of 719 Nearby Stars over Three Decades", The Astrophysical Journal Supplement Series 255 (1): 8, doi:10.3847/1538-4365/abe23c, Bibcode: 2021ApJS..255....8R 
  2. ↑ Butler, R. P. et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal 646 (1): 505–522. doi:10.1086/504701. Bibcode: 2006ApJ...646..505B. http://www.iop.org/EJ/article/0004-637X/646/1/505/64046.html. 
  3. ↑ Wright, J. T. et al. (2007). "Four New Exoplanets and Hints of Additional Substellar Companions to Exoplanet Host Stars". The Astrophysical Journal 657 (1): 533–545. doi:10.1086/510553. Bibcode: 2007ApJ...657..533W. http://www.iop.org/EJ/article/0004-637X/657/1/533/65907.html. 

External links

Coordinates: Sky map 08h 18m 22.1731s, +61° 27′ 38.599″




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