Star · A3V
82 UMa
82 UMa is a main-sequence star of spectral type A3V in the constellation Ursa Major, 168.6 light-years from the Sun.
| Other names | HIP 66634 |
|---|---|
| Constellation | Ursa Major |
| Distance | 168.6 light-years (51.7 pc) |
| Apparent magnitude | magnitude 5.46 |
| Absolute magnitude | magnitude 1.89 |
| Spectral type | A3V |
| Surface temperature | 8,900 K |
| Luminosity | 17.5 L☉ |
| Radius | 1.76 R☉ |
| Mass | 2.06 M☉ (estimated) |
| Right ascension (J2000) | 13h 39m 30.4s |
| Declination (J2000) | +52° 55′ 16″ |
| Space velocity (relative to the Sun) | 39.1 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.46). Visible from the whole Northern Hemisphere and south to latitude 37° S. North of latitude 37° N it never sets. It stands highest at midnight in April, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1857. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 3.0 million years.
The Sun seen from there
From a planet around 82 UMa, the Sun would look like a star of magnitude 8.40, in the direction where our sky has the constellation Eridanus. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 68193 9.69 light-years
- SDSS J134925.25+504954.5 14.1 light-years
- HIP 68204 15.6 light-years
- HIP 69535 16.5 light-years
- κ² Boo 16.7 light-years
- HIP 64128 16.7 light-years
- HIP 64626 16.8 light-years
- HIP 69793 18.4 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.