XO-1 is 533 light-years from the Sun. The NASA Exoplanet Archive lists 1 planet around this G1 V star; the first was found in 2006 by transit (XO).
Fly there in 3DXO-1 b goes round its star every 3.94 days, 22 times as often as Mercury goes round the Sun.
| Spectral type | G1 V |
| Surface temperature | 5,750 K |
| Mass | 0.88 solar masses |
| Radius | 0.88 solar radii |
| Luminosity | 0.8198 times the Sun |
| Apparent magnitude | 11.251 |
| Age | about 0.9 billion years |
| Distance from the Sun | 533.4 light-years (163.6 parsecs) |
| Position (J2000) | RA 240.5493°, Dec 28.1696° |
| Constellation | Corona Borealis |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| XO-1 b | 3.94 days | 0.0488 AU | 12.778 R⊕ | 263.8 M⊕ | Transit, 2006 |
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 5,750 K, 0.82 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 0.86 to 1.52 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 533 years ago, around 1490.