Yed Prior
star · Ophiuchus · 2.7ᵐ
Red star in Ophiuchus.
Notable facts
The light you see today left Yed Prior around the year 1855.
About 20 times brighter than the faintest star visible to the naked eye.
In brief
Which constellation is Yed Prior in?
Yed Prior lies in Ophiuchus.
Is Yed Prior visible to the naked eye?
2.7ᵐ — visible to the naked eye (under dark skies).
When is the best time to observe Yed Prior?
Best observed in May.
Data
- RA / Dec (J2000)
- 16h 14m · −3° 42′
- Type
- star
- Constellation
- Ophiuchus
- How to observe
- 2.7ᵐ — visible to the naked eye (under dark skies)
- Spectral class
- M1III — red star
- Absolute magnitude
- -0.9ᵐ
- Luminosity
- ≈191 × the Sun
- Distance
- ~171 light years
- Designation
- HIP 79593
Observing tip
Stars stay points at any magnification: aim your telescope for colour, brightness and companions, not detail.
Altitude above the horizon by latitude
| Latitude | Maximum altitude | Rise azimuth |
|---|---|---|
| +60° | 26° | 97° |
| +55° | 31° | 96° |
| +45° | 41° | 95° |
| +30° | 56° | 94° |
| 0° | 86° | 94° |
| −35° | 59° | 95° |
Geometric altitude at upper culmination, atmospheric refraction not included. Positive latitudes are in the northern hemisphere.
Culmination time by month
| Month | Culmination |
|---|---|
| January | 08:29 |
| February | 06:22 |
| March | 04:36 |
| April | 02:43 |
| May | 00:49 |
| June | 22:42 |
| July | 20:39 |
| August | 18:38 |
| September | 16:44 |
| October | 14:56 |
| November | 12:55 |
| December | 10:46 |
Upper culmination in local solar time — no time-zone or daylight-saving correction applied.