Star · M2III
83 UMa
83 UMa is a giant star of spectral type M2III in the constellation Ursa Major, 582.8 light-years from the Sun.
| Other names | HIP 66738 |
|---|---|
| Constellation | Ursa Major |
| Distance | 582.8 light-years (178.7 pc) |
| Apparent magnitude | magnitude 4.63 |
| Absolute magnitude | magnitude −1.63 |
| Spectral type | M2III |
| Surface temperature | 3,610 K |
| Luminosity | 1,850 L☉ |
| Radius | 110 R☉ |
| Mass | 7.79 M☉ (estimated) |
| Right ascension (J2000) | 13h 40m 44.3s |
| Declination (J2000) | +54° 40′ 54″ |
| Space velocity (relative to the Sun) | 25.3 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 4.63). Visible from the whole Northern Hemisphere and south to latitude 35° S. North of latitude 35° 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 1443. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 10 million years.
The Sun seen from there
From a planet around 83 UMa, the Sun would look like a star of magnitude 11.09, in the direction where our sky has the constellation Eridanus. 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.