Algedi
star · Capricornus · 3.6ᵐ
Yellow star (like the Sun) in Capricornus. It lies about 106 light years from Earth. In visible light it shines roughly 33 times as bright as the Sun.
Notable facts
The light you see today left Algedi around the year 1920.
About 9 times brighter than the faintest star visible to the naked eye.
In brief
Which constellation is Algedi in?
Algedi lies in Capricornus.
Is Algedi visible to the naked eye?
3.6ᵐ — visible to the naked eye (under dark skies).
When is the best time to observe Algedi?
Best observed in July.
Data
- RA / Dec (J2000)
- 20h 18m · −12° 33′
- Type
- star
- Constellation
- Capricornus
- How to observe
- 3.6ᵐ — visible to the naked eye (under dark skies)
- Spectral class
- G6/G8III — yellow star (like the Sun)
- Absolute magnitude
- 1.0ᵐ
- Luminosity (visual)
- ≈33 × the Sun
- Distance
- ~106 light years
- Designation
- HIP 100064
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° | 17° | 116° |
| +55° | 22° | 112° |
| +45° | 32° | 108° |
| +30° | 47° | 105° |
| 0° | 77° | 103° |
| −35° | 68° | 105° |
Geometric altitude at upper culmination, atmospheric refraction not included. Positive latitudes are in the northern hemisphere.
Culmination time by month
| Month | Culmination |
|---|---|
| January | 12:33 |
| February | 10:25 |
| March | 08:40 |
| April | 06:47 |
| May | 04:52 |
| June | 02:46 |
| July | 00:42 |
| August | 22:41 |
| September | 20:48 |
| October | 18:59 |
| November | 16:59 |
| December | 14:50 |
Upper culmination in local solar time — no time-zone or daylight-saving correction applied.