HD 177830 b is an extrasolar planet located approximately 193 light-years away in the constellation of Lyra, orbiting the star HD 177830. It was discovered in 1999 by the California and Carnegie Planet Search team using the very successful radial velocity method. The planet has a minimum mass of 1.53 times that of Jupiter. Since the inclination of the planet's orbit is not known, its true mass is likely to be somewhat more. Although not detected directly, the planet is certainly a gas giant.
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- HD 177830 b is an extrasolar planet located approximately 193 light-years away in the constellation of Lyra, orbiting the star HD 177830. It was discovered in 1999 by the California and Carnegie Planet Search team using the very successful radial velocity method. The planet has a minimum mass of 1.53 times that of Jupiter. Since the inclination of the planet's orbit is not known, its true mass is likely to be somewhat more. Although not detected directly, the planet is certainly a gas giant. Mean distance from the star is 23% greater than Earth's distance from the Sun. The orbit is nearly circular with distance ranges from 1.110 AU to 1.334 AU. Because the star is 4.78 times more luminous than the Sun, the planet must be hotter than Earth, at around 342 K. In 2000 a group of scientists proposed, based on preliminary Hipparcos astrometrical satellite data, that the orbital inclination is as little as 1.3°. If that was the case, the planet would have a mass of 67 times that of Jupiter making it a brown dwarf instead of a planet. However, it is very unlikely that the planet would have such orbit. Furthermore, brown dwarfs with short orbits around solar-mass stars are exceedingly rare making the claim even more unlikely.
- HD 177830 b ist ein Exoplanet, der den orangen Unterriesen HD 177830 alle 410,1 Tage umkreist. Auf Grund seiner hohen Masse wird angenommen, dass es sich um einen Gasplaneten handelt.
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- HD 177830 b is an extrasolar planet located approximately 193 light-years away in the constellation of Lyra, orbiting the star HD 177830. It was discovered in 1999 by the California and Carnegie Planet Search team using the very successful radial velocity method. The planet has a minimum mass of 1.53 times that of Jupiter. Since the inclination of the planet's orbit is not known, its true mass is likely to be somewhat more. Although not detected directly, the planet is certainly a gas giant.
- HD 177830 b ist ein Exoplanet, der den orangen Unterriesen HD 177830 alle 410,1 Tage umkreist. Auf Grund seiner hohen Masse wird angenommen, dass es sich um einen Gasplaneten handelt.
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![[RDF Data]](/statics/sw-cube.png)
