Star · K7V
K2-123
K2-123 is a main-sequence star of spectral type K7V in the constellation Cancer, 526.9 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Constellation | Cancer |
|---|---|
| Distance | 526.9 light-years (161.6 pc) |
| Apparent magnitude | magnitude 14.78 |
| Absolute magnitude | magnitude 8.74 |
| Spectral type | K7V |
| Surface temperature | 4,040 K |
| Luminosity | 0.072 L☉ |
| Radius | 0.59 R☉ |
| Mass | 0.62 M☉ |
| Metallicity [Fe/H] | 0.03 |
| Right ascension (J2000) | 8h 57m 46.6s |
| Declination (J2000) | +21° 27′ 12″ |
| Space velocity (relative to the Sun) | 45.9 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 14.78. Visible from the whole Northern Hemisphere and south to latitude 69° S. North of latitude 69° N it never sets. It stands highest at midnight in February, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1499. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 9.3 million years.
The Sun seen from there
From a planet around K2-123, the Sun would look like a star of magnitude 10.87, in the direction where our sky has the constellation Capricornus. It would be invisible to the naked eye.
Planets
- K2-123 b 31-day orbit · 2.76 R⊕
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.