Aldulfin
star · Delphinus · 4.0ᵐ
Blue-white star in Delphinus.
Notable facts
The light you see today left Aldulfin around the year 1696.
About 6 times brighter than the faintest star visible to the naked eye.
In brief
Which constellation is Aldulfin in?
Aldulfin lies in Delphinus.
Is Aldulfin visible to the naked eye?
4.0ᵐ — visible to the naked eye (under dark skies).
When is the best time to observe Aldulfin?
Best observed in July.
Data
- RA / Dec (J2000)
- 20h 33m · +11° 18′
- Type
- star
- Constellation
- Delphinus
- How to observe
- 4.0ᵐ — visible to the naked eye (under dark skies)
- Spectral class
- B6III — blue-white star
- Absolute magnitude
- -1.0ᵐ
- Luminosity
- ≈215 × the Sun
- Distance
- ~330 light years
- Designation
- HIP 101421
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° | 41° | 67° |
| +55° | 46° | 70° |
| +45° | 56° | 74° |
| +30° | 71° | 77° |
| 0° | 79° | 79° |
| −35° | 44° | 76° |
Geometric altitude at upper culmination, atmospheric refraction not included. Positive latitudes are in the northern hemisphere.
Culmination time by month
| Month | Culmination |
|---|---|
| January | 12:48 |
| February | 10:40 |
| March | 08:55 |
| April | 07:02 |
| May | 05:07 |
| June | 03:01 |
| July | 00:57 |
| August | 22:56 |
| September | 21:03 |
| October | 19:15 |
| November | 17:14 |
| December | 15:05 |
Upper culmination in local solar time — no time-zone or daylight-saving correction applied.