Star · G8V
GJ 1255-
GJ 1255- is a main-sequence star of spectral type G8V in the constellation Cepheus, 100.7 light-years from the Sun.
| Other names | HIP 102970 |
|---|---|
| Constellation | Cepheus |
| Distance | 100.7 light-years (30.9 pc) |
| Apparent magnitude | magnitude 7.81 |
| Absolute magnitude | magnitude 5.36 |
| Spectral type | G8V |
| Surface temperature | 5,650 K |
| Luminosity | 0.683 L☉ |
| Radius | 0.861 R☉ |
| Mass | 0.909 M☉ (estimated) |
| Right ascension (J2000) | 20h 51m 44.9s |
| Declination (J2000) | +74° 46′ 49″ |
| Space velocity (relative to the Sun) | 107.1 km/s |
In the sky
Too faint for the naked eye (magnitude 7.81); binoculars will find it. Visible from the whole Northern Hemisphere and south to latitude 15° S. North of latitude 15° N it never sets. It stands highest at midnight in August, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1925. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.8 million years.
The Sun seen from there
From a planet around GJ 1255-, the Sun would look like a star of magnitude 7.28, in the direction where our sky has the constellation Volans. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 104375 3.31 light-years
- Gl 765.2 9.11 light-years
- HIP 104225 10.5 light-years
- TOI-1452 11.3 light-years
- GJ 1255A 14.3 light-years
- GJ 1255C 14.3 light-years
- HIP 109474 14.6 light-years
- HIP 103650 15.2 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.