Star · M0
GJ 4145
GJ 4145 is a main-sequence star of spectral type M0 in the constellation Telescopium, 93.5 light-years from the Sun.
| Other names | HIP 100356 |
|---|---|
| Constellation | Telescopium |
| Distance | 93.5 light-years (28.7 pc) |
| Apparent magnitude | magnitude 10.21 |
| Absolute magnitude | magnitude 7.92 |
| Spectral type | M0 |
| Surface temperature | 3,660 K |
| Luminosity | 0.258 L☉ |
| Radius | 1.27 R☉ |
| Mass | 0.713 M☉ (estimated) |
| Right ascension (J2000) | 20h 21m 10.9s |
| Declination (J2000) | −51° 47′ 28″ |
| Space velocity (relative to the Sun) | 14.1 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 10.21. Visible from the whole Southern Hemisphere and north to latitude 38° N. South of latitude 38° S it never sets. It stands highest at midnight in July, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1933. 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 4145, the Sun would look like a star of magnitude 7.12, in the direction where our sky has the constellation Lynx. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- GJ 9691 8.88 light-years
- VHS J205159.38-550843.9 9.40 light-years
- HIP 97156 10.4 light-years
- α Ind 10.4 light-years
- HIP 103673 10.5 light-years
- HIP 101317 11.6 light-years
- HIP 100184 12.0 light-years
- HIP 98105 12.3 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.