Star · M3
GJ 4198
GJ 4198 is a main-sequence star of spectral type M3 in the constellation Grus, 39.7 light-years from the Sun.
| Constellation | Grus |
|---|---|
| Distance | 39.7 light-years (12.2 pc) |
| Apparent magnitude | magnitude 13.19 |
| Absolute magnitude | magnitude 12.76 |
| Spectral type | M3 |
| Surface temperature | 3,620 K |
| Luminosity | 0.00317 L☉ |
| Radius | 0.143 R☉ |
| Mass | 0.155 M☉ (estimated) |
| Right ascension (J2000) | 21h 30m 48.8s |
| Declination (J2000) | −40° 43′ 25″ |
| Space velocity (relative to the Sun) | 100.8 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 13.19. Visible from the whole Southern Hemisphere and north to latitude 49° N. South of latitude 49° S it never sets. 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 1986. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 705 thousand years.
The Sun seen from there
From a planet around GJ 4198, the Sun would look like a star of magnitude 5.26, in the direction where our sky has the constellation Lynx. It would be visible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- GJ 4207 5.00 light-years
- WISE J210200.15-442919.5 6.28 light-years
- WISE J215949.48-480854.9 7.87 light-years
- 2MASS J22282889-4310262 8.32 light-years
- WISE J222055.31-362817.4 8.44 light-years
- PSO J319.3102-29.6682 8.86 light-years
- Gl 798 10.1 light-years
- Gl 799A 10.9 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.