Star · M1III
Yed Prior
Yed Prior is a giant star of spectral type M1III in the constellation Ophiuchus, 159.8 light-years from the Sun.
| Other names | δ Oph · HIP 79593 |
|---|---|
| Constellation | Ophiuchus |
| Distance | 159.8 light-years (49.0 pc) |
| Apparent magnitude | magnitude 2.73 |
| Absolute magnitude | magnitude −0.72 |
| Spectral type | M1III |
| Surface temperature | 3,670 K |
| Luminosity | 726 L☉ |
| Radius | 66.6 R☉ |
| Mass | 5.96 M☉ (estimated) |
| Right ascension (J2000) | 16h 14m 20.7s |
| Declination (J2000) | −3° 41′ 40″ |
| Space velocity (relative to the Sun) | 40.5 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 2.73). Visible from the whole Southern Hemisphere and north to latitude 86° 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 1866. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.8 million years.
The Sun seen from there
From a planet around Yed Prior, the Sun would look like a star of magnitude 8.28, 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 79781 7.52 light-years
- HIP 80616 10.8 light-years
- HIP 78742 15.1 light-years
- HIP 79730 15.3 light-years
- SIMP J16133450-0747057 15.3 light-years
- HIP 80878 15.7 light-years
- HIP 81062 15.9 light-years
- Gl 629.2A 16.7 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.