Star · G5
GJ 3665
GJ 3665 is a giant star of spectral type G5 in the constellation Ursa Major, 302.1 light-years from the Sun.
| Other names | HIP 56020 |
|---|---|
| Constellation | Ursa Major |
| Distance | 302.1 light-years (92.6 pc) |
| Apparent magnitude | magnitude 7.90 |
| Absolute magnitude | magnitude 3.07 |
| Spectral type | G5 |
| Surface temperature | 5,320 K |
| Luminosity | 6.17 L☉ |
| Radius | 2.92 R☉ |
| Mass | 1.58 M☉ (estimated) |
| Right ascension (J2000) | 11h 28m 52.3s |
| Declination (J2000) | +48° 13′ 51″ |
| Space velocity (relative to the Sun) | 33.4 km/s |
In the sky
Too faint for the naked eye (magnitude 7.90); binoculars will find it. Visible from the whole Northern Hemisphere and south to latitude 42° S. North of latitude 42° 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 1724. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 5.4 million years.
The Sun seen from there
From a planet around GJ 3665, the Sun would look like a star of magnitude 9.66, in the direction where our sky has the constellation Phoenix. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 55401 13.9 light-years
- HIP 56170 14.2 light-years
- HIP 56674 15.7 light-years
- HIP 54768 18.0 light-years
- HIP 55391 19.2 light-years
- HIP 54794 19.3 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.