Star · K1III
46 UMa
46 UMa is a giant star of spectral type K1III in the constellation Ursa Major, 240.3 light-years from the Sun.
| Other names | HIP 53426 |
|---|---|
| Constellation | Ursa Major |
| Distance | 240.3 light-years (73.7 pc) |
| Apparent magnitude | magnitude 5.02 |
| Absolute magnitude | magnitude 0.68 |
| Spectral type | K1III |
| Surface temperature | 4,510 K |
| Luminosity | 82.6 L☉ |
| Radius | 14.9 R☉ |
| Mass | 3.21 M☉ (estimated) |
| Right ascension (J2000) | 10h 55m 44.4s |
| Declination (J2000) | +33° 30′ 25″ |
| Space velocity (relative to the Sun) | 46.4 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.02). Visible from the whole Northern Hemisphere and south to latitude 56° S. North of latitude 56° N it never sets. It stands highest at midnight in March, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1786. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 4.3 million years.
The Sun seen from there
From a planet around 46 UMa, the Sun would look like a star of magnitude 9.17, in the direction where our sky has the constellation Piscis Austrinus. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 53120 3.88 light-years
- SDSS J105110.69+314130.0 8.64 light-years
- HIP 54001 11.5 light-years
- HIP 54239 11.5 light-years
- HIP 54428 17.2 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.