Star · K7
K2-401
K2-401 is a main-sequence star of spectral type K7 in the constellation Sextans, 654.7 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Constellation | Sextans |
|---|---|
| Distance | 654.7 light-years (200.7 pc) |
| Apparent magnitude | magnitude 14.01 |
| Absolute magnitude | magnitude 7.50 |
| Spectral type | K7 |
| Surface temperature | 4,210 K |
| Luminosity | 0.146 L☉ |
| Radius | 0.675 R☉ |
| Mass | 0.87 M☉ |
| Metallicity [Fe/H] | -0.10 |
| Right ascension (J2000) | 10h 19m 57.0s |
| Declination (J2000) | +3° 57′ 17″ |
| Space velocity (relative to the Sun) | 75.9 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 14.01. Visible from the whole Northern Hemisphere and south to latitude 86° 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 1371. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 12 million years.
The Sun seen from there
From a planet around K2-401, the Sun would look like a star of magnitude 11.34, in the direction where our sky has the constellation Aquarius. It would be invisible to the naked eye.
Planets
- K2-401 b 6.29-day orbit · 2.26 R⊕
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.