Star · F9 IV
K2-107
K2-107 is a main-sequence star of spectral type F9 IV in the constellation Sagittarius, 2,235 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Constellation | Sagittarius |
|---|---|
| Distance | 2,235 light-years (685.2 pc) |
| Apparent magnitude | magnitude 13.01 |
| Absolute magnitude | magnitude 3.83 |
| Spectral type | F9 IV |
| Surface temperature | 6,060 K |
| Luminosity | 2.91 L☉ |
| Radius | 1.81 R☉ |
| Mass | 1.3 M☉ |
| Age | 4.3 billion years |
| Metallicity [Fe/H] | 0.14 |
| Right ascension (J2000) | 18h 59m 56.5s |
| Declination (J2000) | −22° 17′ 36″ |
| Space velocity (relative to the Sun) | 25.0 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 13.01. Visible from the whole Southern Hemisphere and north to latitude 68° N. South of latitude 68° 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 210 BC. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 40 million years.
The Sun seen from there
From a planet around K2-107, the Sun would look like a star of magnitude 14.01, in the direction where our sky has the constellation Gemini. It would be invisible to the naked eye.
Planets
- K2-107 b 3.31-day orbit · 16 R⊕
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.