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NGC 6451 — Open Cluster in Scorpius

Open Cluster Good (48/100)
Magnitude 8.0m OpenCluster Scorpius (Sco) Visible
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1Properties

Magnitude 8.0
Angular Size 7.2′
Cl, pL, pRi, bifid, st 12...

Position & Identifiers

RA 17h 50m 42.0s
Dec -30° 13' 00.0"
Constellation Scorpius (Sco)
Catalog NGC 6451

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 6451 · 7.2′ 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 6425
Easy
Open cluster
Open Cluster mag 7.2 1.5° Scorpius
3 Sgr
Medium
Pulsating variable, period 7.0d
Variable Star mag 4.54 2.5° Sagittarius
NGC 6416
Easy
Rich open cluster
Open Cluster mag 5.7 2.5° Scorpius
NGC 6522
Easy
Compact globular cluster
Globular Cluster mag 8.6 2.8° Sagittarius
M6
NGC 6405
Easy
Rich open cluster
Open Cluster mag 4.2 3.0° Scorpius
NGC 6520
Easy
Open cluster
Open Cluster mag 8.0 3.6° Sagittarius
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