Star · G2
K2-398
K2-398 is a main-sequence star of spectral type G2 in the constellation Sextans, 1,980 light-years from the Sun. It is orbited by 2 confirmed exoplanet(s).
| Constellation | Sextans |
|---|---|
| Distance | 1,980 light-years (607.0 pc) |
| Apparent magnitude | magnitude 13.29 |
| Absolute magnitude | magnitude 4.37 |
| Spectral type | G2 |
| Surface temperature | 5,950 K |
| Luminosity | 1.82 L☉ |
| Radius | 1.24 R☉ |
| Mass | 0.945 M☉ |
| Metallicity [Fe/H] | -0.26 |
| Right ascension (J2000) | 10h 46m 56.4s |
| Declination (J2000) | +1° 56′ 12″ |
| Space velocity (relative to the Sun) | 66.0 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 13.29. Visible from the whole Northern Hemisphere and south to latitude 88° S. It stands highest at midnight in March, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 46. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 35 million years.
The Sun seen from there
From a planet around K2-398, the Sun would look like a star of magnitude 13.75, in the direction where our sky has the constellation Aquarius. It would be invisible to the naked eye.
Planets
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.