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NGC 6738 — Open Cluster in Aquila

Open Cluster Good (59/100)
Magnitude 8.0m OpenCluster Aquila (Aql) Visible
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1Properties

Magnitude 8.0
Angular Size 5.4′
Cl, P, lC

Position & Identifiers

RA 19h 01m 21.6s
Dec +11° 36' 56.2"
Constellation Aquila (Aql)
Catalog NGC 6738

2How easy to spot?

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Telescope Bortle 3 Bortle 4 Bortle 5
80mm refr. Easy Easy Easy
150mm Newt. Easy Easy Easy
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 Jun – Aug (peak: Jul)

4 Eyepiece View

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125x TFOV: 0.4° Lim. mag: 13.6
N E

NGC 6738 · 5.4′ diameter

5 Best Magnification

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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 6709
Easy
Rich open cluster
Open Cluster mag 6.7 2.8° Aquila
R Aql
Hard+
Mira-type variable, range 5.5–12.0
Variable Star mag 6.09 3.6° Aquila
NGC 6756
Medium+
Open cluster
Open Cluster mag 11.0 7.1° Aquila
NGC 6755
Easy
Open cluster
Open Cluster mag 7.5 7.5° Aquila
IC 4756
Easy
Open cluster
Open Cluster mag 5.0 8.3° Serpens
NGC 6749
Medium
Globular cluster — dense ball of ancient stars
Globular Cluster mag 11.1 9.8° Aquila
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