Star · K5V
K2-55
K2-55 is a main-sequence star of spectral type K5V in the constellation Aquarius, 520.3 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Constellation | Aquarius |
|---|---|
| Distance | 520.3 light-years (159.5 pc) |
| Apparent magnitude | magnitude 13.52 |
| Absolute magnitude | magnitude 7.51 |
| Spectral type | K5V |
| Surface temperature | 4,300 K |
| Luminosity | 0.164 L☉ |
| Radius | 0.715 R☉ |
| Mass | 0.688 M☉ |
| Metallicity [Fe/H] | 0.38 |
| Right ascension (J2000) | 22h 15m 00.5s |
| Declination (J2000) | −17° 15′ 03″ |
| Space velocity (relative to the Sun) | 19.3 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 13.52. Visible from the whole Southern Hemisphere and north to latitude 73° N. South of latitude 73° S it never sets. 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 1506. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 9.2 million years.
The Sun seen from there
From a planet around K2-55, the Sun would look like a star of magnitude 10.84, in the direction where our sky has the constellation Leo. It would be invisible to the naked eye.
Planets
- K2-55 b 2.85-day orbit · 4.43 R⊕
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.