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HAT-P-21 b
Price: 299 USD

HAT-P-21b is an extrasolar planet approximately 829 light years away from Earth, orbiting the 14th magnitude G-type star HAT-P-21, which is located in Ursa Major constellation. It was discovered by the HATNet Project in 2010.

Planet name

HAT-P-12 b



Ursa Major








Distance (LY)



Mass of planet (Mj)



Radius of planet (Rj)



Extrasolar habitable zone candidate



More info.

Exoplanets Data Explorer


Mj - mass of jupiter ( Mj = 317.5 Mass of Earth)

Rj - radius of jupiter (1 Rj = 11,21 Radius of Earth)

Habitable zone- is the region around a star within which planetary-mass objects with sufficient atmospheric pressure can support liquid water at their surfaces.

RA- Right ascension is the celestial equivalent of terrestrial longitude

DEC- Declination in astronomy is comparable to geographic latitude

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