NGC 6664 — Open Cluster in Scutum
Excellent (62/100)
Observe
1Properties
Magnitude
7.8
Angular Size
6.0′
Cl, L, pRi, vlC
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Position & Identifiers
2How easy to spot?
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| Telescope | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| 80 mm refractor 80mm refr. | Easy | Easy | Easy |
| 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
Easy
on Seestar S50
3Visibility
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Best season
May – Jul
(peak: Jun)
4
Eyepiece View
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 6649
Open cluster
Open Cluster
mag 8.9
2.3°
Scutum
M26
NGC 6694
Open cluster
Open Cluster
mag 8.0
2.4°
Scutum
NGC 6683
Open cluster
Open Cluster
mag 10.0
2.5°
Scutum
IC 1287
Reflection nebula around a bright star
Reflection Nebula
mag 6.10
2.9°
Scutum
S Sct
Semi-regular variable, range 6.6–7.3
Variable Star
mag 6.80
3.4°
Scutum
M11
NGC 6705
Rich open cluster
Open Cluster
mag 5.8
4.1°
Scutum
NGC 6712
Globular cluster — dense ball of ancient stars
Globular Cluster
mag 8.2
4.1°
Scutum
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