Star · F5V
η UMi
η UMi is a main-sequence star of spectral type F5V in the constellation Ursa Minor, 97.6 light-years from the Sun.
| Other names | GJ 3950A · HIP 79822 |
|---|---|
| Constellation | Ursa Minor |
| Distance | 97.6 light-years (29.9 pc) |
| Apparent magnitude | magnitude 4.95 |
| Absolute magnitude | magnitude 2.57 |
| Spectral type | F5V |
| Surface temperature | 6,920 K |
| Luminosity | 7.96 L☉ |
| Radius | 1.96 R☉ |
| Mass | 1.68 M☉ (estimated) |
| Right ascension (J2000) | 16h 17m 30.3s |
| Declination (J2000) | +75° 45′ 19″ |
| Space velocity (relative to the Sun) | 38.1 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 4.95). Visible from the whole Northern Hemisphere and south to latitude 14° S. North of latitude 14° N it never sets.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1928. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.7 million years.
The Sun seen from there
From a planet around η UMi, the Sun would look like a star of magnitude 7.21, in the direction where our sky has the constellation Mensa. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.