Star · G2V
GJ 4188B
GJ 4188B is a main-sequence star of spectral type G2V in the constellation Aquarius, 77.7 light-years from the Sun.
| Constellation | Aquarius |
|---|---|
| Distance | 77.7 light-years (23.8 pc) |
| Apparent magnitude | magnitude 13.33 |
| Absolute magnitude | magnitude 11.45 |
| Spectral type | G2V |
| Surface temperature | 5,780 K |
| Luminosity | 0.00245 L☉ |
| Radius | 0.0494 R☉ |
| Mass | 0.139 M☉ (estimated) |
| Right ascension (J2000) | 21h 17m 40.3s |
| Declination (J2000) | −8° 55′ 13″ |
| Space velocity (relative to the Sun) | 73.3 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 13.33. Visible from the whole Southern Hemisphere and north to latitude 81° 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 1948. 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 4188B, the Sun would look like a star of magnitude 6.71, in the direction where our sky has the constellation Cancer. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- GJ 4187A 10.1 light-years
- 2MASSW J2130446-084520 10.5 light-years
- GJ 4217 11.0 light-years
- GJ 4155 12.6 light-years
- GJ 4179 12.7 light-years
- 11 Aqr 13.6 light-years
- 2MASS J21324898-1452544 14.5 light-years
- GJ 4164 15.6 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.