Star · M0V
GJ 3645
GJ 3645 is a main-sequence star of spectral type M0V in the constellation Crater, 132.1 light-years from the Sun.
| Other names | HIP 54569 |
|---|---|
| Constellation | Crater |
| Distance | 132.1 light-years (40.5 pc) |
| Apparent magnitude | magnitude 10.48 |
| Absolute magnitude | magnitude 7.44 |
| Spectral type | M0V |
| Surface temperature | 3,950 K |
| Luminosity | 0.273 L☉ |
| Radius | 1.12 R☉ |
| Mass | 0.723 M☉ (estimated) |
| Right ascension (J2000) | 11h 09m 57.7s |
| Declination (J2000) | −10° 17′ 07″ |
| Space velocity (relative to the Sun) | 6.9 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 10.48. Visible from the whole Southern Hemisphere and north to latitude 80° N. South of latitude 80° S 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 1894. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.3 million years.
The Sun seen from there
From a planet around GJ 3645, the Sun would look like a star of magnitude 7.87, in the direction where our sky has the constellation Pegasus. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 55235 7.35 light-years
- 2MASS J11193254-1137466 8.00 light-years
- HIP 53186 11.2 light-years
- SDSS J110927.19-160653.7 14.0 light-years
- HIP 54072 14.6 light-years
- HIP 55233 15.5 light-years
- HIP 53196 15.8 light-years
- HIP 53250 15.9 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.