HD 212771 b is an

extrasolar planet An exoplanet or extrasolar planet is a planet outside the Solar System. The first possible evidence of an exoplanet was noted in 1917 but was not recognized as such. The first confirmation of detection occurred in 1992. A different planet, init ...

orbiting the G-type star HD 212771 approximately 364 light years away in the constellation

Aquarius Aquarius may refer to: Astrology * Aquarius (astrology), an astrological sign * Age of Aquarius, a time period in the cycle of astrological ages Astronomy * Aquarius (constellation) * Aquarius in Chinese astronomy Arts and entertainme ...

Nomenclature

HD 212771 b is named Victoriapeak. The name was selected in the

NameExoWorlds NameExoWorlds (also known as IAU NameExoWorlds) is the name of various projects managed by the International Astronomical Union (I.A.U.) to encourage names to be submitted for astronomical objects, which would later be considered for official ad ...

campaign by

Hong Kong Hong Kong ( (US) or (UK); , ), officially the Hong Kong Special Administrative Region of the People's Republic of China (abbr. Hong Kong SAR or HKSAR), is a city and special administrative region of China on the eastern Pearl River Delta i ...

, during the 100th anniversary of the

IAU The International Astronomical Union (IAU; french: link=yes, Union astronomique internationale, UAI) is a nongovernmental organisation with the objective of advancing astronomy in all aspects, including promoting astronomical research, outreach ...

. It is named after the

Victoria Peak Victoria Peak is a hill on the western half of Hong Kong Island. It is also known as Mount Austin, and locally as The Peak only generally. With an elevation of , it is the highest hill on Hong Kong Island, ranked 29 in terms of elevation in Ho ...

, the highest point on Hong Kong Island. The host star HD 212771 is named Lionrock, after the

Lion Rock Lion Rock, or less formally Lion Rock Hill, is a mountain in Hong Kong. It is located in Sha Tin District, between Kowloon Tong of Kowloon and Tai Wai of the New Territories, and is high. The peak consists of granite covered sparsely by shr ...

Properties

Orbit

HD 212771 b's orbit period and distance are similar to

Earth Earth is the third planet from the Sun and the only astronomical object known to harbor life. While large volumes of water can be found throughout the Solar System, only Earth sustains liquid surface water. About 71% of Earth's surfa ...

's, with the values being 380 days and 1.19 AU respectively. It orbits in a nearly perfect circular orbit compared to long period gas giants.

Characteristics

Due to the unknown orbital parameters, the planets true mass is not known, with a minimum of 2.39 times

Jupiter Jupiter is the fifth planet from the Sun and the largest in the Solar System. It is a gas giant with a mass more than two and a half times that of all the other planets in the Solar System combined, but slightly less than one-thousandth t ...

's mass. HD 212771 b's radius is unknown, so

NASA The National Aeronautics and Space Administration (NASA ) is an independent agencies of the United States government, independent agency of the US federal government responsible for the civil List of government space agencies, space program ...

's ''Eyes on Exoplanets'' gives an estimate of 1.18 times the radius.

References

External links