NGC 6528 — Globular Cluster in Sagittarius
Fair (39/100)
Observe
1Properties
Magnitude
9.5
Angular Size
3.6′
glob. cl. , pF, cS, R, gbM, rrr, st 16
Querying SIMBAD database...
Position & Identifiers
2How easy to spot?
Sign in
and configure your equipment and default location to see a personalized row.
| Telescope | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| 80 mm refractor 80mm refr. | Medium+ | Medium+ | Medium |
| 150 mm Newton 150mm Newt. | Easy | Easy | Easy |
| Celestron C8 (203 mm SCT) C8 203mm | Easy | Easy | Easy |
Easy
Medium
Hard
Very hard
Impossible
Bortle 3 = rural · 4 = outer suburbs · 5 = suburbs
Medium
on Seestar S50
3Visibility
Set a location in User Settings to see visibility data.
Best season
May – Jul
(peak: Jun)
4
Eyepiece View
125x
TFOV: 0.4°
Lim. mag: 13.6
NGC 6528 · 3.6′ diameter · N up, E left
5
Best Magnification
Explore
6
Classification Decoder
Nearby in the Sky
Other targets within a few degrees — pan your scope a little and keep exploring.
Visibility scores assume a 150 mm Newton at Bortle 4.
NGC 6522
Compact globular cluster
Globular Cluster
mag 8.6
0.3°
Sagittarius
Gamma Sgr
HIP 88567; Gamma1 Sagittarii
Pulsating variable, period 7.6d
Variable Star
mag 4.69
0.5°
Sagittarius
NGC 6558
Globular cluster — dense ball of ancient stars
Globular Cluster
mag 11.29
2.1°
Sagittarius
NGC 6520
Open cluster
Open Cluster
mag 8.0
2.2°
Sagittarius
NGC 6569
Globular cluster — dense ball of ancient stars
Globular Cluster
mag 8.7
2.6°
Sagittarius
NGC 6624
Compact globular cluster
Globular Cluster
mag 8.3
4.1°
Sagittarius
Explore Nightbase
Related knowledge, tools, and stories — no observation planning required.
Harlow Shapley
Determined the size of the Milky Way and the Sun's off-center position
Biography
The Life of Stars
From birth in a nebula to spectacular death — how stars are born, shine, swell, and die, and how to read the clues in their starlight.
Article
Sagittarius
Mythology, bright stars, and deep-sky highlights.
Constellation
