Star · G4
K2-390
K2-390 is a main-sequence star of spectral type G4 in the constellation Aquarius, 1,488 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Constellation | Aquarius |
|---|---|
| Distance | 1,488 light-years (456.1 pc) |
| Apparent magnitude | magnitude 13.61 |
| Absolute magnitude | magnitude 5.31 |
| Spectral type | G4 |
| Surface temperature | 5,560 K |
| Luminosity | 0.796 L☉ |
| Radius | 0.966 R☉ |
| Mass | 0.789 M☉ |
| Metallicity [Fe/H] | -0.12 |
| Right ascension (J2000) | 23h 42m 48.6s |
| Declination (J2000) | −9° 35′ 19″ |
| Space velocity (relative to the Sun) | 87.4 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 13.61. Visible from the whole Southern Hemisphere and north to latitude 80° N. It stands highest at midnight in September, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 538. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 26 million years.
The Sun seen from there
From a planet around K2-390, the Sun would look like a star of magnitude 13.13, in the direction where our sky has the constellation Virgo. It would be invisible to the naked eye.
Planets
- K2-390 b 3.31-day orbit · 4.66 R⊕
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.