Star · G1V
π¹ UMa
π¹ UMa is a main-sequence star of spectral type G1V in the constellation Ursa Major, 47.1 light-years from the Sun.
| Other names | Gl 311 · HIP 42438 |
|---|---|
| Constellation | Ursa Major |
| Distance | 47.1 light-years (14.4 pc) |
| Apparent magnitude | magnitude 5.63 |
| Absolute magnitude | magnitude 4.83 |
| Spectral type | G1V |
| Surface temperature | 5,900 K |
| Luminosity | 1.06 L☉ |
| Radius | 0.986 R☉ |
| Mass | 1.01 M☉ (estimated) |
| Right ascension (J2000) | 8h 39m 11.7s |
| Declination (J2000) | +65° 01′ 15″ |
| Space velocity (relative to the Sun) | 14.5 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.63). Visible from the whole Northern Hemisphere and south to latitude 25° S. North of latitude 25° N it never sets. It stands highest at midnight in January, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1979. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 835 thousand years.
The Sun seen from there
From a planet around π¹ UMa, the Sun would look like a star of magnitude 5.63, in the direction where our sky has the constellation Pavo. It would be visible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- Gl 310 2.07 light-years
- SDSS J090900.73+652527.2 4.64 light-years
- GJ 3506 5.27 light-years
- GJ 3520 6.69 light-years
- Gl 322 6.88 light-years
- SDSSp J085758.45+570851.4 6.95 light-years
- GJ 3480 7.26 light-years
- GJ 3526 7.59 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.