2MASS J19383260+4603591 is 1,293 light-years from the Sun. The NASA Exoplanet Archive lists 3 planets around this 29,564 K star; the first was found in 2015 by eclipse timing variations (Kepler).
Fly there in 3DKepler-451 d goes round its star every 43.0 days, 2.0 times as often as Mercury goes round the Sun.
2MASS J19383260+4603591 is one of 2 stars in its system. The position of the other star is not catalogued, so only 2MASS J19383260+4603591 and its planets are drawn.
Where the archive gives only a period or only an orbit size, the other is worked out from Kepler’s third law with the star’s mass.
| Surface temperature | 29,564 K |
| Mass | 0.48 solar masses |
| Radius | 0.203 solar radii |
| Luminosity | 28.18 times the Sun |
| Apparent magnitude | 12.651 |
| Distance from the Sun | 1292.7 light-years (396.3 parsecs) |
| Position (J2000) | RA 294.6359°, Dec 46.0664° |
| Constellation | Cygnus |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| Kepler-451 d | 43.0 days | 0.188 AU from Kepler’s law | 13.5 R⊕ estimated | 559.38 M⊕ minimum | Eclipse Timing Variations, 2022 |
| 2MASS J19383260+4603591 b | 406.0 days | 0.920 AU | 13.4 R⊕ estimated | 603.88 M⊕ | Eclipse Timing Variations, 2015 |
| Kepler-451 c | 4.0 years | 1.972 AU from Kepler’s law | 13.5 R⊕ estimated | 511.7 M⊕ minimum | Eclipse Timing Variations, 2022 |
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.