WASP-138 is 1,351 light-years from the Sun. The NASA Exoplanet Archive lists 1 planet around this 6,272 K star; the first was found in 2016 by transit (SuperWASP).
Fly there in 3DWASP-138 b goes round its star every 3.63 days, 24 times as often as Mercury goes round the Sun.
| Surface temperature | 6,272 K |
| Mass | 1.22 solar masses |
| Radius | 1.36 solar radii |
| Luminosity | 2.723 times the Sun |
| Apparent magnitude | 11.796 |
| Age | about 3.44 billion years |
| Distance from the Sun | 1351.1 light-years (414.2 parsecs) |
| Position (J2000) | RA 41.6392°, Dec -0.4641° |
| Constellation | Cetus |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| WASP-138 b | 3.63 days | 0.0494 AU | 12.218 R⊕ | 387.75 M⊕ | Transit, 2016 |
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 6,272 K, 2.7 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 1.52 to 2.65 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 1,351 years ago, around AD 670.