HD 219828
Constellation, Pegasus (constellation), Light-year, Apparent magnitude, Star, Subgiant, Extrasolar planet
Herausgegeben: Mainyu, Eldon A.
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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. HD 219828 is an 8th magnitude star approximately 265 light years away in the constellation of Pegasus. It is a yellow subgiant, meaning that hydrogen fusion has ceased in its core. In 2007, a Neptune-mass planet was found orbiting the star by Melo. According to the author, assuming an Earth-like rocky composition,the planet could yield a radius 2.2 times that of Earth. This could be furtherly proved if transit were observed, though, as authors state, it is a difficult...
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. HD 219828 is an 8th magnitude star approximately 265 light years away in the constellation of Pegasus. It is a yellow subgiant, meaning that hydrogen fusion has ceased in its core. In 2007, a Neptune-mass planet was found orbiting the star by Melo. According to the author, assuming an Earth-like rocky composition,the planet could yield a radius 2.2 times that of Earth. This could be furtherly proved if transit were observed, though, as authors state, it is a difficult task.