Star · ?
GJ 4186B
GJ 4186B is a main-sequence star of spectral type ? in the constellation Cygnus, 50.2 light-years from the Sun.
| Constellation | Cygnus |
|---|---|
| Distance | 50.2 light-years (15.4 pc) |
| Apparent magnitude | magnitude 13.49 |
| Absolute magnitude | magnitude 12.55 |
| Spectral type | ? |
| Surface temperature | 3,650 K |
| Luminosity | 0.00367 L☉ |
| Radius | 0.152 R☉ |
| Mass | 0.166 M☉ (estimated) |
| Right ascension (J2000) | 21h 16m 03.1s |
| Declination (J2000) | +29° 51′ 45″ |
| Space velocity (relative to the Sun) | 15.4 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 13.49. Visible from the whole Northern Hemisphere and south to latitude 60° S. North of latitude 60° N 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 1976. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 890 thousand years.
The Sun seen from there
From a planet around GJ 4186B, the Sun would look like a star of magnitude 5.77, in the direction where our sky has the constellation Pyxis. It would be visible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- TYC 2187-512-1 6.21 light-years
- GJ 4177B 6.63 light-years
- SPECULOOS-3 7.63 light-years
- Gl 813 7.91 light-years
- GJ 4225 8.19 light-years
- Gl 835 8.54 light-years
- HIP 101516 9.12 light-years
- WISEPC J215751.38+265931.4 9.17 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.