Star · G5V
K2-108
K2-108 is a main-sequence star of spectral type G5V in the constellation Cancer, 1,557 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Constellation | Cancer |
|---|---|
| Distance | 1,557 light-years (477.3 pc) |
| Apparent magnitude | magnitude 12.34 |
| Absolute magnitude | magnitude 3.95 |
| Spectral type | G5V |
| Surface temperature | 5,600 K |
| Luminosity | 2.54 L☉ |
| Radius | 1.76 R☉ |
| Mass | 1.17 M☉ |
| Age | 7.8 billion years |
| Metallicity [Fe/H] | 0.36 |
| Right ascension (J2000) | 8h 13m 31.6s |
| Declination (J2000) | +16° 25′ 10″ |
| Space velocity (relative to the Sun) | 53.7 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 12.34. Visible from the whole Northern Hemisphere and south to latitude 74° S. North of latitude 74° N it never sets. It stands highest at midnight in January, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 469. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 28 million years.
The Sun seen from there
From a planet around K2-108, the Sun would look like a star of magnitude 13.22, in the direction where our sky has the constellation Capricornus. It would be invisible to the naked eye.
Planets
- K2-108 b 4.73-day orbit · 5.33 R⊕
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.