Star · G8III
Yed Posterior
Yed Posterior is a giant star of spectral type G8III in the constellation Ophiuchus, 106.9 light-years from the Sun.
| Other names | ε Oph · GJ 3949 · HIP 79882 |
|---|---|
| Constellation | Ophiuchus |
| Distance | 106.9 light-years (32.8 pc) |
| Apparent magnitude | magnitude 3.23 |
| Absolute magnitude | magnitude 0.65 |
| Spectral type | G8III |
| Surface temperature | 4,830 K |
| Luminosity | 70.2 L☉ |
| Radius | 12 R☉ |
| Mass | 3.06 M☉ (estimated) |
| Right ascension (J2000) | 16h 18m 19.3s |
| Declination (J2000) | −4° 41′ 33″ |
| Space velocity (relative to the Sun) | 16.5 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 3.23). Visible from the whole Southern Hemisphere and north to latitude 85° N. 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 1919. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.9 million years.
The Sun seen from there
From a planet around Yed Posterior, the Sun would look like a star of magnitude 7.41, in the direction where our sky has the constellation Taurus. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 78999 5.36 light-years
- GJ 3969 11.1 light-years
- Gl 618.1 11.2 light-years
- HIP 78336 11.7 light-years
- HIP 78395 11.9 light-years
- HIP 81084 12.5 light-years
- Gl 634.1 13.3 light-years
- WISE J163645.56-074325.1 13.3 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.