Star · G3V
K2-231
K2-231 is a main-sequence star of spectral type G3V in the constellation Sagittarius, 1,048 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Constellation | Sagittarius |
|---|---|
| Distance | 1,048 light-years (321.2 pc) |
| Apparent magnitude | magnitude 12.77 |
| Absolute magnitude | magnitude 5.24 |
| Spectral type | G3V |
| Surface temperature | 5,700 K |
| Luminosity | 0.773 L☉ |
| Radius | 0.95 R☉ |
| Mass | 1.01 M☉ |
| Age | 3.0 billion years |
| Metallicity [Fe/H] | 0.14 |
| Right ascension (J2000) | 19h 16m 22.0s |
| Declination (J2000) | −15° 46′ 16″ |
| Space velocity (relative to the Sun) | 39.6 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 12.77. Visible from the whole Southern Hemisphere and north to latitude 74° N. South of latitude 74° S it never sets. It stands highest at midnight in July, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 978. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 19 million years.
The Sun seen from there
From a planet around K2-231, the Sun would look like a star of magnitude 12.36, in the direction where our sky has the constellation Gemini. It would be invisible to the naked eye.
Planets
- K2-231 b 13.8-day orbit · 2.5 R⊕
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.