Azelfafage
star · Cygnus · 4.7ᵐ
Blue-white star in Cygnus.
Notable facts
The light you see today left Azelfafage around the year 300.
About 3 times brighter than the faintest star visible to the naked eye.
In brief
Which constellation is Azelfafage in?
Azelfafage lies in Cygnus.
Is Azelfafage visible to the naked eye?
4.7ᵐ — visible to the naked eye (under dark skies).
When is the best time to observe Azelfafage?
Best observed in August.
Data
- RA / Dec (J2000)
- 21h 42m · +51° 11′
- Type
- star
- Constellation
- Cygnus
- How to observe
- 4.7ᵐ — visible to the naked eye (under dark skies)
- Spectral class
- B3IV — blue-white star
- Absolute magnitude
- -3.9ᵐ
- Luminosity
- ≈3,192 × the Sun
- Distance
- ~1,726 light years
- Designation
- HIP 107136
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° | 81° · never sets | — |
| +55° | 86° · never sets | — |
| +45° | 84° · never sets | — |
| +30° | 69° | 26° |
| 0° | 39° | 39° |
| −35° | 4° | 18° |
Geometric altitude at upper culmination, atmospheric refraction not included. Positive latitudes are in the northern hemisphere.
Culmination time by month
| Month | Culmination |
|---|---|
| January | 13:57 |
| February | 11:49 |
| March | 10:04 |
| April | 08:11 |
| May | 06:16 |
| June | 04:10 |
| July | 02:06 |
| August | 00:05 |
| September | 22:12 |
| October | 20:23 |
| November | 18:23 |
| December | 16:14 |
Upper culmination in local solar time — no time-zone or daylight-saving correction applied.