Star · K2III
HIP 21611
HIP 21611 is a giant star of spectral type K2III in the constellation Mensa, 540.2 light-years from the Sun.
| Constellation | Mensa |
|---|---|
| Distance | 540.2 light-years (165.6 pc) |
| Apparent magnitude | magnitude 6.05 |
| Absolute magnitude | magnitude −0.05 |
| Spectral type | K2III |
| Surface temperature | 4,560 K |
| Luminosity | 157 L☉ |
| Radius | 20.1 R☉ |
| Mass | 3.85 M☉ (estimated) |
| Right ascension (J2000) | 4h 38m 21.7s |
| Declination (J2000) | −77° 39′ 22″ |
| Space velocity (relative to the Sun) | 14.3 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 6.05). Visible from the whole Southern Hemisphere and north to latitude 12° N. South of latitude 12° S it never sets.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1486. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 9.6 million years.
The Sun seen from there
From a planet around HIP 21611, the Sun would look like a star of magnitude 10.93, in the direction where our sky has the constellation Ursa Minor. It would be invisible to the naked eye.
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.