Star · F2V
28 UMa
28 UMa is a main-sequence star of spectral type F2V in the constellation Ursa Major, 275.7 light-years from the Sun.
| Other names | HIP 47911 |
|---|---|
| Constellation | Ursa Major |
| Distance | 275.7 light-years (84.5 pc) |
| Apparent magnitude | magnitude 6.51 |
| Absolute magnitude | magnitude 1.88 |
| Spectral type | F2V |
| Surface temperature | 7,060 K |
| Luminosity | 15.1 L☉ |
| Radius | 2.6 R☉ |
| Mass | 1.97 M☉ (estimated) |
| Right ascension (J2000) | 9h 45m 55.4s |
| Declination (J2000) | +63° 39′ 12″ |
| Space velocity (relative to the Sun) | 37.4 km/s |
In the sky
Too faint for the naked eye (magnitude 6.51); binoculars will find it. Visible from the whole Northern Hemisphere and south to latitude 26° S. North of latitude 26° 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 1750. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 4.9 million years.
The Sun seen from there
From a planet around 28 UMa, the Sun would look like a star of magnitude 9.46, in the direction where our sky has the constellation Indus. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 48034 16.1 light-years
- HIP 47043 17.2 light-years
- HIP 48266 18.9 light-years
- HIP 49517 19.7 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.