Star · K
GJ 3643
GJ 3643 is a main-sequence star of spectral type K in the constellation Leo, 58.3 light-years from the Sun.
| Other names | HIP 54227 |
|---|---|
| Constellation | Leo |
| Distance | 58.3 light-years (17.9 pc) |
| Apparent magnitude | magnitude 12.37 |
| Absolute magnitude | magnitude 11.11 |
| Spectral type | K |
| Surface temperature | 3,690 K |
| Luminosity | 0.0131 L☉ |
| Radius | 0.28 R☉ |
| Mass | 0.288 M☉ (estimated) |
| Right ascension (J2000) | 11h 05m 42.8s |
| Declination (J2000) | +10° 14′ 15″ |
| Space velocity (relative to the Sun) | 97.4 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 12.37. Visible from the whole Northern Hemisphere and south to latitude 80° S. North of latitude 80° 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 1968. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.0 million years.
The Sun seen from there
From a planet around GJ 3643, the Sun would look like a star of magnitude 6.09, in the direction where our sky has the constellation Aquarius. It would be visible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.