GJ 740 is 36.2 light-years from the Sun. The NASA Exoplanet Archive lists 1 planet around this M1.0 V star; the first was found in 2021 by radial velocity (Multiple Observatories).
Fly there in 3DGJ 740 b goes round its star every 2.38 days, 37 times as often as Mercury goes round the Sun.
| Spectral type | M1.0 V |
| Surface temperature | 3,913 K |
| Mass | 0.58 solar masses |
| Radius | 0.56 solar radii |
| Luminosity | 0.06223 times the Sun |
| Apparent magnitude | 9.22 |
| Distance from the Sun | 36.2 light-years (11.1 parsecs) |
| Position (J2000) | RA 284.4997°, Dec 5.9029° |
| Constellation | Serpens |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| GJ 740 b | 2.38 days | 0.0290 AU | 1.53 R⊕ estimated | 2.96 M⊕ minimum | Radial Velocity, 2021 |
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 3,913 K, 0.062 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 0.26 to 0.49 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 36 years ago, within living memory.