Gliese 86 b explained

Gliese 86 b
Discoverer:	Mayor et al.^[1]
Discovery Site:	France
Discovered:	24 November 1998
Apsis:	astron
Period:	15.76491 ± 0.00039 d
Time Periastron:	2451903.36 ± 0.59
Arg Peri:	269 ± 16
Semi-Amplitude:	376.7 ± 2.9
Mass:	≥

Gliese 86 b, sometimes referred to as Gliese 86 A b^[2] (so as to distinguish the planet from companion star "B") and/or shortened to Gl 86 b, is an extrasolar planet approximately 35 light-years away in the constellation of Eridanus. The planet was discovered orbiting a K-type main-sequence star (Gliese 86 A) by French scientists in November 1998. The planet orbits very close to the star, completing an orbit in 15.78 days.

Preliminary astrometric measurements made with the Hipparcos space probe suggested the planet has an orbital inclination of 164.0° and a mass 15 times that of Jupiter, which would make the object a brown dwarf.^[3] However, further analysis suggests the Hipparcos measurements are not precise enough to reliably determine astrometric orbits of substellar companions, thus the orbital inclination and true mass of the candidate planet remain unknown.^[4]

See also

• List of exoplanets discovered before 2000

External links

• Web site: Gliese 86 / HR 637 AB . 2008-08-02 . SolStation . 2007-08-09 . https://web.archive.org/web/20070809030714/http://www.solstation.com/stars2/gl86.htm . live .
• Web site: Gliese 86 . 2017-09-23 . Open Exoplanet Catalogue . 2017-01-07 . https://web.archive.org/web/20170107042532/http://www.openexoplanetcatalogue.com/planet/Gliese%2086%20b/ . dead .

Notes and References

1. [Michel Mayor]
2. 2112.06394. Zeng. Yunlin. Brandt. Timothy D.. Li. Gongjie. Dupuy. Trent J.. Li. Yiting. Mirek Brandt. G.. Farihi. Jay. Horner. Jonathan. Wittenmyer. Robert A.. Butler. R. Paul.. Tinney. Christopher G.. Carter. Bradley D.. Wright. Duncan J.. Jones. Hugh R. A.. O'Toole. Simon J.. The Gliese 86 Binary System: A Warm Jupiter Formed in a Disk Truncated at ≈2 au. The Astronomical Journal. 2022. 164. 5. 188. 10.3847/1538-3881/ac8ff7. 2022AJ....164..188Z. 245123923. free.
3. Han . Preliminary astrometric masses for proposed extrasolar planetary companions . The Astrophysical Journal Letters . 548 . 1 . L57–L60 . 2001 . 10.1086/318927 . Black . David C. . Gatewood . George . 2001ApJ...548L..57H . free .
4. 2001A&A...372..935P. Screening the Hipparcos-based astrometric orbits of sub-stellar objects. Pourbaix, D. . Arenou, F.. Astronomy and Astrophysics. 372. 3. 935 - 944. 2001. 10.1051/0004-6361:20010597. astro-ph/0104412 . 378792 .