CoRoT-21 is 4,562 light-years from the Sun. The NASA Exoplanet Archive lists 1 planet around this F8 IV star; the first was found in 2012 by transit (CoRoT).
Fly there in 3DCoRoT-21 b goes round its star every 2.72 days, 32 times as often as Mercury goes round the Sun.
| Spectral type | F8 IV |
| Surface temperature | 6,200 K |
| Mass | 1.29 solar masses |
| Radius | 1.95 solar radii |
| Luminosity | 5.07 times the Sun |
| Apparent magnitude | 16.058 |
| Age | about 4.1 billion years |
| Distance from the Sun | 4562.4 light-years (1398.8 parsecs) |
| Position (J2000) | RA 101.0526°, Dec -0.2992° |
| Constellation | Monoceros |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| CoRoT-21 b | 2.72 days | 0.0417 AU | 14.572 R⊕ | 718.3 M⊕ | Transit, 2012 |
Values are the NASA Exoplanet Archive’s composite parameters. A radius marked estimated comes from a mass–radius relation; a mass marked minimum is M sin i. Planet sizes and colours in the 3D view are renderings: none of these worlds has been photographed as more than a point of light.
For a star of 6,200 K, 5.1 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 2.09 to 3.64 AU. None of its known planets orbits inside it. The zone says how much starlight arrives, not whether a planet has water or air. The edges follow Kopparapu et al. (2014), as the 3D view draws them.
The light you see left 4,562 years ago, around 2500 BC.