Kepler-304 is 1,418 light-years from the Sun. The NASA Exoplanet Archive lists 4 planets around this 4,731 K star; the first was found in 2014 by transit (Kepler).
Fly there in 3DKepler-304 e goes round its star every 36.0 hours, 59 times as often as Mercury goes round the Sun.
| Surface temperature | 4,731 K |
| Mass | 0.737 solar masses |
| Radius | 0.687 solar radii |
| Luminosity | 0.218 times the Sun |
| Apparent magnitude | 15.065 |
| Age | about 2.09 billion years |
| Distance from the Sun | 1417.7 light-years (434.7 parsecs) |
| Position (J2000) | RA 294.4418°, Dec 40.5575° |
| Constellation | Cygnus |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| Kepler-304 e | 36.0 hours | 0.0232 AU | 1.2 R⊕ | 1.87 M⊕ estimated | Transit, 2016 |
| Kepler-304 b | 3.30 days | 0.0390 AU | 2.86 R⊕ | 8.55 M⊕ estimated | Transit, 2014 |
| Kepler-304 c | 5.32 days | 0.0540 AU | 2.17 R⊕ | 5.35 M⊕ estimated | Transit, 2014 |
| Kepler-304 d | 9.65 days | 0.0800 AU | 2.75 R⊕ | 8 M⊕ estimated | Transit, 2014 |
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.