Star · ?
GJ 4255
GJ 4255 is a main-sequence star of spectral type ? in the constellation Cepheus, 136.1 light-years from the Sun.
| Constellation | Cepheus |
|---|---|
| Distance | 136.1 light-years (41.7 pc) |
| Apparent magnitude | magnitude 15.87 |
| Absolute magnitude | magnitude 12.77 |
| Spectral type | ? |
| Surface temperature | 3,390 K |
| Luminosity | 0.00468 L☉ |
| Radius | 0.198 R☉ |
| Mass | 0.184 M☉ (estimated) |
| Right ascension (J2000) | 22h 03m 29.0s |
| Declination (J2000) | +78° 16′ 45″ |
| Space velocity (relative to the Sun) | 49.9 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 15.87. Visible from the whole Northern Hemisphere and south to latitude 12° S. North of latitude 12° N it never sets.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1890. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.4 million years.
The Sun seen from there
From a planet around GJ 4255, the Sun would look like a star of magnitude 7.93, in the direction where our sky has the constellation Chamaeleon. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 106882 7.52 light-years
- HIP 105557 11.2 light-years
- HIP 110773 11.4 light-years
- HIP 108456 12.0 light-years
- HIP 108461 12.2 light-years
- HIP 111494 12.3 light-years
- HIP 115777 13.5 light-years
- GJ 9843 14.5 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.