Star · M2
GJ 3987
GJ 3987 is a main-sequence star of spectral type M2 in the constellation Ophiuchus, 64.5 light-years from the Sun.
| Other names | HIP 83405 |
|---|---|
| Constellation | Ophiuchus |
| Distance | 64.5 light-years (19.8 pc) |
| Apparent magnitude | magnitude 10.86 |
| Absolute magnitude | magnitude 9.38 |
| Spectral type | M2 |
| Surface temperature | 4,240 K |
| Luminosity | 0.0342 L☉ |
| Radius | 0.343 R☉ |
| Mass | 0.43 M☉ (estimated) |
| Right ascension (J2000) | 17h 02m 49.6s |
| Declination (J2000) | −6° 04′ 07″ |
| Space velocity (relative to the Sun) | 24.7 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 10.86. Visible from the whole Southern Hemisphere and north to latitude 84° N. 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 1961. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.1 million years.
The Sun seen from there
From a planet around GJ 3987, the Sun would look like a star of magnitude 6.31, 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):
- DENIS-P J170548.38-051645.7 3.33 light-years
- GJ 1212 4.94 light-years
- GJ 3975 6.35 light-years
- HIP 85042 6.97 light-years
- GJ 4005 6.98 light-years
- 2MASS J17065487-1314396 8.14 light-years
- Gl 654.1 8.24 light-years
- GJ 4000B 8.60 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.