Star · M0
K2-122
K2-122 is a main-sequence star of spectral type M0 in the constellation Cancer, 235.8 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Constellation | Cancer |
|---|---|
| Distance | 235.8 light-years (72.3 pc) |
| Apparent magnitude | magnitude 13.08 |
| Absolute magnitude | magnitude 8.78 |
| Spectral type | M0 |
| Surface temperature | 4,010 K |
| Luminosity | 0.079 L☉ |
| Radius | 0.59 R☉ |
| Mass | 0.63 M☉ |
| Metallicity [Fe/H] | 0.32 |
| Right ascension (J2000) | 8h 25m 54.3s |
| Declination (J2000) | +20° 21′ 34″ |
| Space velocity (relative to the Sun) | 24.4 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 13.08. Visible from the whole Northern Hemisphere and south to latitude 70° S. North of latitude 70° 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 1790. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 4.2 million years.
The Sun seen from there
From a planet around K2-122, the Sun would look like a star of magnitude 9.13, in the direction where our sky has the constellation Capricornus. It would be invisible to the naked eye.
Planets
- K2-122 b 2.22-day orbit · 1.16 R⊕
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.