Star · K2II
GJ 3771
GJ 3771 is a bright giant star of spectral type K2II in the constellation Ursa Major, 1,258 light-years from the Sun.
| Other names | HIP 64523 |
|---|---|
| Constellation | Ursa Major |
| Distance | 1,258 light-years (385.8 pc) |
| Apparent magnitude | magnitude 7.98 |
| Absolute magnitude | magnitude 0.05 |
| Spectral type | K2II |
| Surface temperature | 4,450 K |
| Luminosity | 156 L☉ |
| Radius | 21 R☉ |
| Mass | 3.84 M☉ (estimated) |
| Right ascension (J2000) | 13h 13m 28.4s |
| Declination (J2000) | +56° 40′ 51″ |
| Space velocity (relative to the Sun) | 34.1 km/s |
In the sky
Too faint for the naked eye (magnitude 7.98); binoculars will find it. Visible from the whole Northern Hemisphere and south to latitude 33° S. North of latitude 33° N it never sets. It stands highest at midnight in April, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 768. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 22 million years.
The Sun seen from there
From a planet around GJ 3771, the Sun would look like a star of magnitude 12.76, in the direction where our sky has the constellation Phoenix. It would be invisible to the naked eye.
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.