Star · ?
GJ 3891
GJ 3891 is a main-sequence star of spectral type ? in the constellation Draco, 66.9 light-years from the Sun.
| Constellation | Draco |
|---|---|
| Distance | 66.9 light-years (20.5 pc) |
| Apparent magnitude | magnitude 13.35 |
| Absolute magnitude | magnitude 11.79 |
| Spectral type | ? |
| Surface temperature | 3,650 K |
| Luminosity | 0.00743 L☉ |
| Radius | 0.216 R☉ |
| Mass | 0.225 M☉ (estimated) |
| Right ascension (J2000) | 15h 05m 50.6s |
| Declination (J2000) | +55° 04′ 39″ |
| Space velocity (relative to the Sun) | 46.8 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 13.35. Visible from the whole Northern Hemisphere and south to latitude 35° S. North of latitude 35° N it never sets. It stands highest at midnight in May, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1959. 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 3891, the Sun would look like a star of magnitude 6.39, in the direction where our sky has the constellation Horologium. It would be visible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- WISE J154459.27+584204.5 7.51 light-years
- HIP 76315 7.94 light-years
- WISEPC J145715.03+581510.2 8.41 light-years
- GJ 3861 8.80 light-years
- PSO J224.3820+47.4057 9.07 light-years
- 2MASS J14283132+5923354 9.29 light-years
- GJ 3920 9.30 light-years
- CWISEP J153859.39+482659.1 9.88 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.