Star · K9V
GJ 3641
GJ 3641 is a main-sequence star of spectral type K9V in the constellation Ursa Major, 94.2 light-years from the Sun.
| Other names | HIP 54212 |
|---|---|
| Constellation | Ursa Major |
| Distance | 94.2 light-years (28.9 pc) |
| Apparent magnitude | magnitude 11.10 |
| Absolute magnitude | magnitude 8.80 |
| Spectral type | K9V |
| Surface temperature | 3,820 K |
| Luminosity | 0.0922 L☉ |
| Radius | 0.694 R☉ |
| Mass | 0.551 M☉ (estimated) |
| Right ascension (J2000) | 11h 05m 33.7s |
| Declination (J2000) | +45° 00′ 31″ |
| Space velocity (relative to the Sun) | 37.3 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 11.10. Visible from the whole Northern Hemisphere and south to latitude 45° S. North of latitude 45° 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 1932. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.7 million years.
The Sun seen from there
From a planet around GJ 3641, the Sun would look like a star of magnitude 7.13, in the direction where our sky has the constellation Grus. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 53637 5.99 light-years
- SDSS J105213.51+442255.7 9.58 light-years
- GJ 3640 9.90 light-years
- HIP 52470 10.3 light-years
- WISE J114340.22+443123.8 11.9 light-years
- GJ 3613 12.2 light-years
- HIP 55507 12.5 light-years
- GJ 3627A 13.4 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.