Star · ?
GJ 3981
GJ 3981 is a main-sequence star of spectral type ? in the constellation Hercules, 42.4 light-years from the Sun.
| Constellation | Hercules |
|---|---|
| Distance | 42.4 light-years (13.0 pc) |
| Apparent magnitude | magnitude 13.13 |
| Absolute magnitude | magnitude 12.56 |
| Spectral type | ? |
| Surface temperature | 3,650 K |
| Luminosity | 0.00365 L☉ |
| Radius | 0.151 R☉ |
| Mass | 0.165 M☉ (estimated) |
| Right ascension (J2000) | 16h 58m 25.3s |
| Declination (J2000) | +13° 58′ 01″ |
| Space velocity (relative to the Sun) | 24.6 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 13.13. Visible from the whole Northern Hemisphere and south to latitude 76° S. North of latitude 76° 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 1984. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 751 thousand years.
The Sun seen from there
From a planet around GJ 3981, the Sun would look like a star of magnitude 5.40, in the direction where our sky has the constellation Eridanus. It would be visible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- GJ 1215 4.28 light-years
- GJ 1210 5.15 light-years
- Gl 655 7.04 light-years
- GJ 3997 7.08 light-years
- WISEPA J161705.75+180714.3 7.91 light-years
- SDSS J162838.77+230821.1 8.71 light-years
- GJ 2128 9.13 light-years
- GJ 1204 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.