Planets Map Solar system

Exoplanet data from the NASA Exoplanet Archive. Images of exoplanets are illustrations computed from the data, not photographs. Maps of the solar system: Solar System Scope. Sky panorama: ESO/S. Brunier. Both under CC BY 4.0, scaled down.

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HAT-P-21 · ExoFinder

HAT-P-21

Star 904 light-years from the Sun with one known planet

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Planet

HAT-P-21 bGas giant, scorching

Star

Spectral type: G3
Temperature: 5,588 K
Radius: 1.21 × Sun
Mass: 1.24 × Sun
Brightness seen from Earth: 11.5 mag
Distance: 904 ly (277 pc)

Brightness is given in magnitudes: the smaller the number, the brighter the star. The faintest stars visible to the naked eye are around 6 mag.

Position

Right ascension: 171.2749°
Declination: 41.0280°
Catalogue names: Gaia DR3 770622651659107712