Kepler-1921 is 3,030 light-years from the Sun. The NASA Exoplanet Archive lists 2 planets around this 6,120 K star; the first was found in 2021 by transit (Kepler).
Fly there in 3DKepler-1921 c goes round its star every 3.16 days, 28 times as often as Mercury goes round the Sun.
| Surface temperature | 6,120 K |
| Mass | 1.251 solar masses |
| Radius | 2 solar radii |
| Luminosity | 6.401 times the Sun |
| Apparent magnitude | 13.103 |
| Age | about 3.39 billion years |
| Distance from the Sun | 3030.0 light-years (929.0 parsecs) |
| Position (J2000) | RA 300.3162°, Dec 45.4953° |
| Constellation | Cygnus |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| Kepler-1921 c | 3.16 days | 0.0454 AU | 1.41 R⊕ | 2.57 M⊕ estimated | Transit, 2023 |
| Kepler-1921 b | 20.0 days | 0.159 AU | 2.8946 R⊕ | 8.72 M⊕ estimated | Transit, 2021 |
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 6,120 K, 6.4 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 2.36 to 4.12 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 3,030 years ago, around 1000 BC.