GJ 3942 is 55.2 light-years from the Sun. The NASA Exoplanet Archive lists 1 planet around this M0 star; the first was found in 2017 by radial velocity (Roque de los Muchachos Observatory).
Fly there in 3DGJ 3942 b goes round its star every 6.91 days, 13 times as often as Mercury goes round the Sun.
| Spectral type | M0 |
| Surface temperature | 3,867 K |
| Mass | 0.63 solar masses |
| Radius | 0.61 solar radii |
| Luminosity | 0.07586 times the Sun |
| Apparent magnitude | 10.166 |
| Distance from the Sun | 55.2 light-years (16.9 parsecs) |
| Position (J2000) | RA 242.2645°, Dec 52.9441° |
| Constellation | Draco |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| GJ 3942 b | 6.91 days | 0.0608 AU | 2.57 R⊕ estimated | 7.14 M⊕ minimum | Radial Velocity, 2017 |
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.