WASP-121 is 880 light-years from the Sun. The NASA Exoplanet Archive lists 1 planet around this F6 V star; the first was found in 2016 by transit (SuperWASP).
Fly there in 3DWASP-121 b goes round its star every 30.6 hours, 69 times as often as Mercury goes round the Sun.
| Spectral type | F6 V |
| Surface temperature | 6,628 K |
| Mass | 1.33 solar masses |
| Radius | 1.461 solar radii |
| Luminosity | 4.403 times the Sun |
| Apparent magnitude | 10.514 |
| Age | about 1.11 billion years |
| Distance from the Sun | 880.3 light-years (269.9 parsecs) |
| Position (J2000) | RA 107.6002°, Dec -39.0973° |
| Constellation | Puppis |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| WASP-121 b | 30.6 hours | 0.0257 AU | 19.526 R⊕ | 371.86 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 6,628 K, 4.4 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 1.90 to 3.29 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 880 years ago, around 1150.