WASP-123 is 646 light-years from the Sun. The NASA Exoplanet Archive lists 1 planet around this G5 star; the first was found in 2016 by transit (SuperWASP).
Fly there in 3DWASP-123 b goes round its star every 2.98 days, 30 times as often as Mercury goes round the Sun.
WASP-123 is one of 2 stars in its system. The position of the other star is not catalogued, so only WASP-123 and its planets are drawn.
| Spectral type | G5 |
| Surface temperature | 5,740 K |
| Mass | 1.166 solar masses |
| Radius | 1.285 solar radii |
| Luminosity | 1.453 times the Sun |
| Apparent magnitude | 11.03 |
| Age | about 6.9 billion years |
| Distance from the Sun | 645.8 light-years (198.0 parsecs) |
| Position (J2000) | RA 289.4792°, Dec -32.8601° |
| Constellation | Sagittarius |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| WASP-123 b | 2.98 days | 0.0426 AU | 15.132 R⊕ | 285.73 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 5,740 K, 1.5 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 1.15 to 2.03 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 646 years ago, around 1380.