XO-3 is 695 light-years from the Sun. The NASA Exoplanet Archive lists 1 planet around this F5V star; the first was found in 2007 by transit (XO).
Fly there in 3DXO-3 b goes round its star every 3.19 days, 28 times as often as Mercury goes round the Sun.
| Spectral type | F5V |
| Surface temperature | 6,970 K |
| Mass | 1.449 solar masses |
| Radius | 1.523 solar radii |
| Luminosity | 4.92 times the Sun |
| Apparent magnitude | 9.854 |
| Age | about 0.97 billion years |
| Distance from the Sun | 694.9 light-years (213.1 parsecs) |
| Position (J2000) | RA 65.4696°, Dec 57.8172° |
| Constellation | Camelopardalis |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| XO-3 b | 3.19 days | 0.0481 AU | 14.796 R⊕ | 4217.6 M⊕ | Transit, 2007 |
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.