Star · ?
GJ 3856
GJ 3856 is a main-sequence star of spectral type ? in the constellation Boötes, 51.5 light-years from the Sun.
| Constellation | Boötes |
|---|---|
| Distance | 51.5 light-years (15.8 pc) |
| Apparent magnitude | magnitude 13.61 |
| Absolute magnitude | magnitude 12.62 |
| Spectral type | ? |
| Surface temperature | 3,650 K |
| Luminosity | 0.00346 L☉ |
| Radius | 0.147 R☉ |
| Mass | 0.161 M☉ (estimated) |
| Right ascension (J2000) | 14h 32m 10.4s |
| Declination (J2000) | +16° 00′ 47″ |
| Space velocity (relative to the Sun) | 14.4 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 13.61. Visible from the whole Northern Hemisphere and south to latitude 74° S. North of latitude 74° N it never sets. It stands highest at midnight in April, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1975. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 913 thousand years.
The Sun seen from there
From a planet around GJ 3856, the Sun would look like a star of magnitude 5.82, in the direction where our sky has the constellation Cetus. It would be visible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- Gl 552 5.12 light-years
- HD 128311 6.05 light-years
- 2MASSW J1439284+192915 6.19 light-years
- GJ 3879B 6.34 light-years
- Gl 562 7.20 light-years
- Gl 548A 7.31 light-years
- Gl 548B 7.32 light-years
- 2MASSW J1448256+103159 7.40 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.