Prima Hyadum
star · Taurus · 3.6ᵐ
Yellow star (like the Sun) in Taurus.
Notable facts
The light you see today left Prima Hyadum around the year 1864.
About 9 times brighter than the faintest star visible to the naked eye.
In brief
Which constellation is Prima Hyadum in?
Prima Hyadum lies in Taurus.
Is Prima Hyadum visible to the naked eye?
3.6ᵐ — visible to the naked eye (under dark skies).
When is the best time to observe Prima Hyadum?
Best observed in November.
Data
- RA / Dec (J2000)
- 4h 20m · +15° 38′
- Type
- star
- Constellation
- Taurus
- How to observe
- 3.6ᵐ — visible to the naked eye (under dark skies)
- Spectral class
- G8III — yellow star (like the Sun)
- Absolute magnitude
- 0.2ᵐ
- Luminosity
- ≈72 × the Sun
- Distance
- ~162 light years
- Designation
- HIP 20205
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° | 46° | 57° |
| +55° | 51° | 62° |
| +45° | 61° | 68° |
| +30° | 76° | 72° |
| 0° | 74° | 74° |
| −35° | 39° | 71° |
Geometric altitude at upper culmination, atmospheric refraction not included. Positive latitudes are in the northern hemisphere.
Culmination time by month
| Month | Culmination |
|---|---|
| January | 20:34 |
| February | 18:27 |
| March | 16:42 |
| April | 14:48 |
| May | 12:54 |
| June | 10:48 |
| July | 08:44 |
| August | 06:43 |
| September | 04:50 |
| October | 03:01 |
| November | 01:00 |
| December | 22:52 |
Upper culmination in local solar time — no time-zone or daylight-saving correction applied.