Star · K5
GJ 3977
GJ 3977 is a main-sequence star of spectral type K5 in the constellation Hercules, 96.9 light-years from the Sun.
| Other names | HIP 82408 |
|---|---|
| Constellation | Hercules |
| Distance | 96.9 light-years (29.7 pc) |
| Apparent magnitude | magnitude 9.49 |
| Absolute magnitude | magnitude 7.12 |
| Spectral type | K5 |
| Surface temperature | 4,350 K |
| Luminosity | 0.248 L☉ |
| Radius | 0.878 R☉ |
| Mass | 0.706 M☉ (estimated) |
| Right ascension (J2000) | 16h 50m 26.4s |
| Declination (J2000) | +47° 44′ 19″ |
| Space velocity (relative to the Sun) | 17.0 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 9.49. Visible from the whole Northern Hemisphere and south to latitude 42° S. North of latitude 42° N 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 1929. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.7 million years.
The Sun seen from there
From a planet around GJ 3977, the Sun would look like a star of magnitude 7.20, in the direction where our sky has the constellation Pictor. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 81800 4.52 light-years
- HIP 82092 6.13 light-years
- HIP 81633 9.31 light-years
- WISE J165842.56+510335.0 10.2 light-years
- PSO J260.3363+46.6739 10.4 light-years
- HIP 81919 11.3 light-years
- 2MASS J16154255+4953211 11.8 light-years
- HIP 79941 12.1 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.