Star · G5
GJ 3644
GJ 3644 is a main-sequence star of spectral type G5 in the constellation Leo, 95.8 light-years from the Sun.
| Other names | HIP 54541 |
|---|---|
| Constellation | Leo |
| Distance | 95.8 light-years (29.4 pc) |
| Apparent magnitude | magnitude 7.69 |
| Absolute magnitude | magnitude 5.35 |
| Spectral type | G5 |
| Surface temperature | 5,350 K |
| Luminosity | 0.747 L☉ |
| Radius | 1.01 R☉ |
| Mass | 0.93 M☉ (estimated) |
| Right ascension (J2000) | 11h 09m 40.2s |
| Declination (J2000) | +2° 27′ 22″ |
| Space velocity (relative to the Sun) | 40.3 km/s |
In the sky
Too faint for the naked eye (magnitude 7.69); binoculars will find it. Visible from the whole Northern Hemisphere and south to latitude 88° S. 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 1930. 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 3644, the Sun would look like a star of magnitude 7.17, in the direction where our sky has the constellation Pisces. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- GJ 3664 8.11 light-years
- χ Leo 8.46 light-years
- SDSS J104922.45+012559.2 9.56 light-years
- GJ 3624 10.6 light-years
- HIP 55988 11.8 light-years
- WISEA J104216.89-003935.9 12.5 light-years
- PSO J167.1132+08.6331 12.6 light-years
- 89 Leo 12.8 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.