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NGC 6546 — Open Cluster in Sagittarius

Open Cluster Good (53/100)
Magnitude 8.0m OpenCluster Sagittarius (Sgr) Visible
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1Properties

Magnitude 8.0
Angular Size 6.9′
Cl, vL, vRi

Position & Identifiers

RA 18h 07m 22.6s
Dec -23° 17' 46.3"
Constellation Sagittarius (Sgr)
Catalog NGC 6546

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 May – Jul (peak: Jun)

4 Eyepiece View

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125x TFOV: 0.4° Lim. mag: 13.6
N E

NGC 6546 · 6.9′ 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.

IC 4678
Medium
Diffuse nebula
Diffuse Nebula mag 10.40 0.6° Sagittarius
Collinder 367
Easy
Open cluster
Open Cluster mag 6.4 0.8° Sagittarius
M21
Webb's Cross Cluster
Easy
Rich open cluster
Open Cluster mag 6.5 1.0° Sagittarius
M20
Trifid Nebula
Easy
Emission nebula — try an OIII filter
Emission Nebula mag 6.3 1.2° Sagittarius
NGC 6530
Easy
Rich open cluster
Open Cluster mag 4.6 1.2° Sagittarius
9 Sgr
Easy
Hot blue O-type star
Star mag 5.97 1.3° Sagittarius
NGC 6568
Easy
Open cluster
Open Cluster mag 9.0 2.1° Sagittarius
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