HD 154857 [SEP] constellation
HD 154857
HD 154857 is a yellow main-sequence star approximately 209 light years away in the constellation of Ara.
Planetary system.
There is one confirmed and one unconfirmed planet discovered in 2004 and 2007 respectively. The confirmed planet HD 154857 b has mass 1.8 times that of Jupiter. It orbits the star 20% further than Earth-Sun distance, taking 409 days with 47% eccentricity. The previously reported additional object (HD 154857 c) was confirmed to have planetary nature in January 2014.
See
Mikko Tuomi
Mikko Tuomi is a Finnish astronomer from the University of Hertfordshire, most known for his contributions to the discovery of a number of exoplanets, among them the Proxima Centauri b which orbits the closest star to the Sun. Mikko Tuomi was the first to find indications of the existence of Proxima Centauri b in archival observation data. Other exoplanets to whose discovery or study Tuomi has contributed include HD 40307, HD 154857 c, Kapteyn c, Gliese 682 c, HD 154857, Gliese 221, Gliese 581 g and the