Astronomers have found a new giant planet, HD 4203c, outside of our solar system rotating around a neighboring G5 star HD 4203.
HD 4203c is rotating around its star in a time of 18.2 years of Earth. This planet is found to be of mass of about 2.17 times that of Jupiter. HD 4203 is located about 250 light years away from us in the constellation Pisces.
This star system is same as the other three systems with extrasolar planets, HD 168443, HD 1690 and HD 137759, analyzed by using Gemini North observatory in Hawaii.
“at the same time, the planets that had already been discovered in these systems followed eccentric orbits, swinging away from their stars in a less circular and more elliptical fashion, more like that of a comet,” Dr Stephen Kane of San Francisco State University said.
Usually other nearby star is responsible for radial velocity and eccentric orbits but these systems have no other stars.
This newly discovered planet is helpful in finding more information about the formation of extrasolar planets.
SF State astronomers discover new planet in Pisces Constellation – SF State News (http://goo.gl/QFktWn)
Stephen R. Kane, Steve B. Howell, Elliott P. Horch, Ying Feng, Natalie R. Hinkel, David R. Ciardi, Mark E. Everett, Andrew W. Howard, & Jason T. Wright (2014). Limits on Stellar Companions to Exoplanet Host Stars With Eccentric Planets arXiv arXiv: 1401.1544v1