GJ 4276 is 69.6 light-years from the Sun. The NASA Exoplanet Archive lists 1 planet around this M4.0 star; the first was found in 2019 by radial velocity (Calar Alto Observatory).
Fly there in 3DGJ 4276 b goes round its star every 13.4 days, 7 times as often as Mercury goes round the Sun.
| Spectral type | M4.0 |
| Surface temperature | 3,387 K |
| Mass | 0.406 solar masses |
| Radius | 0.407 solar radii |
| Luminosity | 0.0197 times the Sun |
| Apparent magnitude | 12.903 |
| Age | about 6.9 billion years |
| Distance from the Sun | 69.6 light-years (21.3 parsecs) |
| Position (J2000) | RA 336.3221°, Dec 59.4125° |
| Constellation | Cepheus |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| GJ 4276 b | 13.4 days | 0.0820 AU | 4.22 R⊕ estimated | 16.57 M⊕ minimum | Radial Velocity, 2019 |
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 3,387 K, 0.020 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 0.15 to 0.28 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 70 years ago, within living memory.