Azelfafage
star · Cygnus · 4.7ᵐ
Blue-white star in Cygnus. It lies about 1,726 light years from Earth. In visible light it shines roughly 3,200 times as bright as the Sun.
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 (visual)
- ≈3,200 × 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.