LP 791-18 is 86.4 light-years from the Sun. The NASA Exoplanet Archive lists 3 planets around this M(6.1 +/- 0.7) V star; the first was found in 2019 by transit (Transiting Exoplanet Survey Satellite (TESS)).
Fly there in 3DLP 791-18 b goes round its star every 22.8 hours, 93 times as often as Mercury goes round the Sun.
| Spectral type | M(6.1 +/- 0.7) V |
| Surface temperature | 2,960 K |
| Mass | 0.139 solar masses |
| Radius | 0.182 solar radii |
| Luminosity | 0.0023 times the Sun |
| Apparent magnitude | 16.91 |
| Age | about 0.5 billion years |
| Distance from the Sun | 86.4 light-years (26.5 parsecs) |
| Position (J2000) | RA 165.6905°, Dec -16.4064° |
| Constellation | Crater |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| LP 791-18 b | 22.8 hours | 0.0098 AU | 1.212 R⊕ | 1.94 M⊕ estimated | Transit, 2019 |
| LP 791-18 d | 2.75 days | 0.0199 AU | 1.032 R⊕ | 0.91 M⊕ | Transit, 2023 |
| LP 791-18 c | 4.99 days | 0.0296 AU | 2.488 R⊕ | 7.16 M⊕ | Transit, 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 2,960 K, 0.0023 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 0.050 to 0.100 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 86 years ago, within living memory.