Star · M4
K2-28
K2-28 is a main-sequence star of spectral type M4 in the constellation Aquarius, 205.5 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Constellation | Aquarius |
|---|---|
| Distance | 205.5 light-years (63.0 pc) |
| Apparent magnitude | magnitude 16.10 |
| Absolute magnitude | magnitude 12.10 |
| Spectral type | M4 |
| Surface temperature | 3,210 K |
| Luminosity | 0.0115 L☉ |
| Radius | 0.288 R☉ |
| Mass | 0.257 M☉ |
| Metallicity [Fe/H] | 0.26 |
| Right ascension (J2000) | 22h 22m 29.6s |
| Declination (J2000) | −7° 57′ 23″ |
| Space velocity (relative to the Sun) | 95.7 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 16.10. Visible from the whole Southern Hemisphere and north to latitude 82° N. It stands highest at midnight in August, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1821. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 3.6 million years.
The Sun seen from there
From a planet around K2-28, the Sun would look like a star of magnitude 8.83, in the direction where our sky has the constellation Leo. It would be invisible to the naked eye.
Planets
- K2-28 b 2.26-day orbit · 2.32 R⊕
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.