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NGC 4439 — Open Cluster in Crux

Open Cluster Good (42/100)
Magnitude 8.4m OpenCluster Crux (Cru) Visible
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1Properties

Magnitude 8.4
Angular Size 4.5′
Cl, S, st 11...12

Position & Identifiers

RA 12h 28m 24.0s
Dec -60° 06' 00.0"
Constellation Crux (Cru)
Catalog NGC 4439

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 Feb – Apr (peak: Mar)

4 Eyepiece View

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125x TFOV: 0.4° Lim. mag: 13.6
N E

NGC 4439 · 4.5′ diameter

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 4349
Easy
Open cluster
Open Cluster mag 7.4 1.8° Crux
NGC 4337
Easy
Open cluster
Open Cluster mag 8.9 2.1° Crux
NGC 4103
Easy
Open cluster
Open Cluster mag 7.0 2.9° Crux
Jewel Box
NGC 4755
Easy
Rich open cluster
Open Cluster mag 4.2 3.1° Crux
Coalsack Nebula
Easy
Dark nebula — shows as a void against the Milky Way
Dark Nebula mag 12.0 3.7° Crux
S Cru
Medium
Pulsating variable, period 4.7d
Variable Star mag 6.58 3.7° Crux
Show on Map

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