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NGC 5999 — Open Cluster in Norma

Open Cluster Good (45/100)
Magnitude 9.0m OpenCluster Norma (Nor) Visible
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1Properties

Magnitude 9.0
Angular Size 3.3′
Cl, L, pRi, st 12...14

Position & Identifiers

RA 15h 52m 08.6s
Dec -56° 28' 22.1"
Constellation Norma (Nor)
Catalog NGC 5999

2How easy to spot?

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Telescope Bortle 3 Bortle 4 Bortle 5
80mm refr. Easy Easy Medium+
150mm Newt. Easy Easy Easy
C8 203mm Easy Easy Easy
Easy Medium Hard Very hard Impossible

Bortle 3 = rural · 4 = outer suburbs · 5 = suburbs

Medium on Seestar S50

3Visibility

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Best season Apr – Jun (peak: May)

4 Eyepiece View

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125x TFOV: 0.4° Lim. mag: 13.6
N E

NGC 5999 · 3.3′ 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 6005
Medium+
Open cluster
Open Cluster mag 10.7 1.1° Norma
NGC 6031
Easy
Open cluster
Open Cluster mag 8.5 3.3° Norma
NGC 6067
Easy
Rich open cluster
Open Cluster mag 5.6 3.7° Norma
S Nor
Medium
Pulsating variable, period 9.8d
Variable Star mag 6.49 3.9° Norma
C89
NGC 6087
Easy
Rich open cluster
Open Cluster mag 5.4 3.9° Norma
NGC 5946
Easy
Compact globular cluster
Globular Cluster mag 9.6 6.3° Norma
Zeta Lup
Easy
Easy double, sep 71.7″
Double Star mag 3.41 7.3° Lupus
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