Star · M3III
ρ UMa
ρ UMa is a giant star of spectral type M3III in the constellation Ursa Major, 320.8 light-years from the Sun.
| Other names | HIP 44390 |
|---|---|
| Constellation | Ursa Major |
| Distance | 320.8 light-years (98.4 pc) |
| Apparent magnitude | magnitude 4.74 |
| Absolute magnitude | magnitude −0.22 |
| Spectral type | M3III |
| Surface temperature | 3,730 K |
| Luminosity | 421 L☉ |
| Radius | 49.1 R☉ |
| Mass | 5.11 M☉ (estimated) |
| Right ascension (J2000) | 9h 02m 32.7s |
| Declination (J2000) | +67° 37′ 47″ |
| Space velocity (relative to the Sun) | 14.0 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 4.74). Visible from the whole Northern Hemisphere and south to latitude 22° S. North of latitude 22° N it never sets. It stands highest at midnight in February, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1705. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 5.7 million years.
The Sun seen from there
From a planet around ρ UMa, the Sun would look like a star of magnitude 9.79, in the direction where our sky has the constellation Pavo. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 45775 15.8 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.