Star · M3
GJ 4000B
GJ 4000B is a main-sequence star of spectral type M3 in the constellation Serpens, 67.9 light-years from the Sun.
| Constellation | Serpens |
|---|---|
| Distance | 67.9 light-years (20.8 pc) |
| Apparent magnitude | magnitude 12.91 |
| Absolute magnitude | magnitude 11.32 |
| Spectral type | M3 |
| Surface temperature | 3,810 K |
| Luminosity | 0.00918 L☉ |
| Radius | 0.22 R☉ |
| Mass | 0.246 M☉ (estimated) |
| Right ascension (J2000) | 17h 17m 43.3s |
| Declination (J2000) | −11° 49′ 36″ |
| Space velocity (relative to the Sun) | 28.6 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 12.91. Visible from the whole Southern Hemisphere and north to latitude 78° N. South of latitude 78° S it never sets. It stands highest at midnight in June, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1958. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.2 million years.
The Sun seen from there
From a planet around GJ 4000B, the Sun would look like a star of magnitude 6.42, in the direction where our sky has the constellation Orion. It would be visible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- GJ 1212 4.24 light-years
- 2MASS J17065487-1314396 5.11 light-years
- GJ 4023 8.25 light-years
- GJ 3987 8.60 light-years
- GJ 4005 9.03 light-years
- Gl 690.1 9.17 light-years
- DENIS-P J1745346-164053 10.3 light-years
- DENIS-P J170548.38-051645.7 10.4 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.