HD 43197 b is an
extrasolar planet which orbits the
G-type main sequence or
subgiant star HD 43197 , located approximately 204
light years away in the
constellation Canis Major . This planet has a
minimum mass 55% that of
Jupiter and takes 0.85 years to orbit the star at a
semimajor axis of 0.882
AU . It has a high
eccentricity of 0.74, but its
inclination is not known. This planet was detected by
HARPS on October 19, 2009, together with 29 other planets.
In 2022, a second super-Jovian planet was discovered orbiting HD 43197 using a combination of radial velocity and astrometry . Assuming HD 43197 b shares the outer planet's orbital inclination , its true mass would be about 4 M J
The planet HD 43197 b is named Equiano . The name was selected in the NameExoWorlds campaign by Nigeria , during the 100th anniversary of the IAU . Olaudah Equiano was a writer and abolitionist from Ihiala , Nigeria who fought injustice and for the elimination of the slave trade .
References
^ Feng, Fabo; Butler, R. Paul; et al. (August 2022). "3D Selection of 167 Substellar Companions to Nearby Stars" . The Astrophysical Journal Supplement Series 262 (21): 21. arXiv :2208.12720 Bibcode :2022ApJS..262...21F . doi :10.3847/1538-4365/ac7e57 S2CID 251864022 . ^ Naef, Dominique; Mayor, Michel; Lo Curto, Gaspare; Bouchy, François; Lovis, Christophe; Moutou, Claire; Benz, Willy; Pepe, Francesco; Queloz, Didier; Santos, Nuno C.; Ségransan, Damien; Udry, Stéphane; Bonfils, Xavier; Delfosse, Xavier; Forveille, Thierry; Hébrard, Guillaume; Mordasini, Christoph; Perrier, Christian; Boisse, Isabelle; Sosnowska, Danuta (2010). "The HARPS Search for Southern Extrasolar Planets XXIII. 8 Planetary Companions to Low-activity Solar-type Stars" . Astronomy and Astrophysics . 523 : A15. arXiv :1008.4600 Bibcode :2010A&A...523A..15N . doi :10.1051/0004-6361/200913616 . S2CID 118845989 . ^ "Approved names" . NameExoworlds . Retrieved 2020-01-02 .^ "International Astronomical Union | IAU" . www.iau.org . Retrieved 2020-01-02 .
