Nunki
star · Sagittarius · 2.0ᵐ
Blue-white star in Sagittarius.
Notable facts
The light you see today left Nunki around the year 1798.
About 38 times brighter than the faintest star visible to the naked eye.
In brief
Which constellation is Nunki in?
Nunki lies in Sagittarius.
Is Nunki visible to the naked eye?
2.0ᵐ — visible to the naked eye (under dark skies).
When is the best time to observe Nunki?
Best observed in July.
Data
- RA / Dec (J2000)
- 18h 55m · −26° 18′
- Type
- star
- Constellation
- Sagittarius
- How to observe
- 2.0ᵐ — visible to the naked eye (under dark skies)
- Spectral class
- B2.5V — blue-white star
- Absolute magnitude
- -2.2ᵐ
- Luminosity
- ≈631 × the Sun
- Distance
- ~228 light years
- Designation
- HIP 92855
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° | 4° | 152° |
| +55° | 9° | 141° |
| +45° | 19° | 129° |
| +30° | 34° | 121° |
| 0° | 64° | 116° |
| −35° | 81° | 123° |
Geometric altitude at upper culmination, atmospheric refraction not included. Positive latitudes are in the northern hemisphere.
Culmination time by month
| Month | Culmination |
|---|---|
| January | 11:10 |
| February | 09:03 |
| March | 07:17 |
| April | 05:24 |
| May | 03:29 |
| June | 01:23 |
| July | 23:19 |
| August | 21:18 |
| September | 19:25 |
| October | 17:37 |
| November | 15:36 |
| December | 13:27 |
Upper culmination in local solar time — no time-zone or daylight-saving correction applied.