HAT-P-23 is 1,190 light-years from the Sun. The NASA Exoplanet Archive lists 1 planet around this G0 star; the first was found in 2010 by transit (HATNet).
Fly there in 3DHAT-P-23 b goes round its star every 29.1 hours, 73 times as often as Mercury goes round the Sun.
| Spectral type | G0 |
| Surface temperature | 5,905 K |
| Mass | 1.13 solar masses |
| Radius | 1.203 solar radii |
| Luminosity | 1.581 times the Sun |
| Apparent magnitude | 11.937 |
| Age | about 4 billion years |
| Distance from the Sun | 1189.9 light-years (364.8 parsecs) |
| Position (J2000) | RA 306.1239°, Dec 16.7621° |
| Constellation | Delphinus |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| HAT-P-23 b | 29.1 hours | 0.0232 AU | 15.334 R⊕ | 664.24 M⊕ | Transit, 2010 |
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 5,905 K, 1.6 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 1.19 to 2.08 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 1,190 years ago, around AD 840.