TOI-421 is 244 light-years from the Sun. The NASA Exoplanet Archive lists 2 planets around this G9 V star; the first was found in 2020 by transit (Transiting Exoplanet Survey Satellite (TESS)).
Fly there in 3DTOI-421 b goes round its star every 5.20 days, 17 times as often as Mercury goes round the Sun.
TOI-421 is one of 2 stars in its system. The position of the other star is not catalogued, so only TOI-421 and its planets are drawn.
| Spectral type | G9 V |
| Surface temperature | 5,291 K |
| Mass | 0.833 solar masses |
| Radius | 0.866 solar radii |
| Luminosity | 0.5398 times the Sun |
| Apparent magnitude | 9.931 |
| Age | about 10.9 billion years |
| Distance from the Sun | 243.9 light-years (74.8 parsecs) |
| Position (J2000) | RA 81.8533°, Dec -14.2767° |
| Constellation | Lepus |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| TOI-421 b | 5.20 days | 0.0554 AU | 2.64 R⊕ | 6.7 M⊕ | Transit, 2020 |
| TOI-421 c | 16.1 days | 0.117 AU | 5.09 R⊕ | 14.1 M⊕ | Transit, 2020 |
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.