Star · M3
GJ 4217
GJ 4217 is a main-sequence star of spectral type M3 in the constellation Aquarius, 81.3 light-years from the Sun.
| Constellation | Aquarius |
|---|---|
| Distance | 81.3 light-years (24.9 pc) |
| Apparent magnitude | magnitude 13.54 |
| Absolute magnitude | magnitude 11.56 |
| Spectral type | M3 |
| Surface temperature | 3,580 K |
| Luminosity | 0.0102 L☉ |
| Radius | 0.263 R☉ |
| Mass | 0.258 M☉ (estimated) |
| Right ascension (J2000) | 21h 45m 25.2s |
| Declination (J2000) | −5° 54′ 10″ |
| Space velocity (relative to the Sun) | 43.8 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 13.54. Visible from the whole Southern Hemisphere and north to latitude 84° N. It stands highest at midnight in August, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1945. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.4 million years.
The Sun seen from there
From a planet around GJ 4217, the Sun would look like a star of magnitude 6.81, in the direction where our sky has the constellation Sextans. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- GJ 4236 7.58 light-years
- 2MASSW J2130446-084520 8.93 light-years
- 2MASS J21542494-1023022 10.0 light-years
- GJ 4188B 11.0 light-years
- GJ 4254 11.8 light-years
- GJ 4262 12.7 light-years
- GJ 4187A 12.9 light-years
- μ Cap 13.1 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.