Star · F7V
Dubhe
Dubhe is a main-sequence star of spectral type F7V in the constellation Ursa Major, 122.9 light-years from the Sun.
| Other names | α UMa · HIP 54061 |
|---|---|
| Constellation | Ursa Major |
| Distance | 122.9 light-years (37.7 pc) |
| Apparent magnitude | magnitude 1.81 |
| Absolute magnitude | magnitude −1.07 |
| Spectral type | F7V |
| Surface temperature | 4,600 K |
| Luminosity | 391 L☉ |
| Radius | 31.1 R☉ |
| Mass | 5 M☉ (estimated) |
| Right ascension (J2000) | 11h 03m 43.7s |
| Declination (J2000) | +61° 45′ 04″ |
| Space velocity (relative to the Sun) | 26.9 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 1.81). Visible from the whole Northern Hemisphere and south to latitude 28° S. North of latitude 28° 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 1903. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.2 million years.
The Sun seen from there
From a planet around Dubhe, the Sun would look like a star of magnitude 7.71, in the direction where our sky has the constellation Tucana. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 54199 9.98 light-years
- HIP 56299 12.6 light-years
- HIP 57350 12.8 light-years
- GJ 3676 13.2 light-years
- HIP 55459 14.0 light-years
- HIP 56035 14.6 light-years
- HIP 51197 17.2 light-years
- 2MASS J10293958+5715445 17.5 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.