Star · K9V
K2-321
K2-321 is a main-sequence star of spectral type K9V in the constellation Sextans, 251.1 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Constellation | Sextans |
|---|---|
| Distance | 251.1 light-years (77.0 pc) |
| Apparent magnitude | magnitude 13.65 |
| Absolute magnitude | magnitude 9.22 |
| Spectral type | K9V |
| Surface temperature | 3,750 K |
| Luminosity | 0.063 L☉ |
| Radius | 0.595 R☉ |
| Mass | 0.578 M☉ |
| Metallicity [Fe/H] | 0.15 |
| Right ascension (J2000) | 10h 25m 37.3s |
| Declination (J2000) | +2° 30′ 50″ |
| Space velocity (relative to the Sun) | 62.2 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 13.65. Visible from the whole Northern Hemisphere and south to latitude 87° S. 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 1775. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 4.5 million years.
The Sun seen from there
From a planet around K2-321, the Sun would look like a star of magnitude 9.26, in the direction where our sky has the constellation Aquarius. It would be invisible to the naked eye.
Planets
- K2-321 b 2.3-day orbit · 2.05 R⊕
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 50351 9.61 light-years
- K2-266 9.95 light-years
- PSO J158.1597+05.2231 14.1 light-years
- HIP 50982 16.8 light-years
- 43 Leo 18.3 light-years
- 24 Sex 19.0 light-years
- HIP 52401 19.6 light-years
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.