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NGC 5822 — Open Cluster in Lupus

Open Cluster Excellent (62/100)
Magnitude 7.0m OpenCluster Lupus (Lup) Visible
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1Properties

Magnitude 7.0
Angular Size 18.0′
Cl, vL, Ri, lC, st 9...12

Position & Identifiers

RA 15h 04m 21.2s
Dec -54° 23' 47.0"
Constellation Lupus (Lup)
Catalog NGC 5822
Physical size
15 light-years across — about 1.7× the Sun-to-Sirius distance

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
At 150mm under B5 skies you should resolve about 257 of 633 members.

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 5822 · 18.0′ diameter

5 Best Magnification

6Where this cluster sits in time

1 Myr 10 Myr 100 Myr 1 Gyr 10 Gyr NGC 2362 Pleiades M67 NGC 188 NGC 5822 912 Myr

Open clusters span more than four orders of magnitude in age — from newborn OB associations to ancient, metal-rich survivors.

7 Colour-Magnitude Diagram

A cluster's colour-magnitude diagram reveals its age: the bluer the turn-off point where the main sequence bends into red giants, the younger the cluster.

Loading member data…

Each point is a Gaia-DR3 member. Colour encodes spectral type; size reflects membership probability.

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8 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 5823
Easy
Open cluster
Open Cluster mag 7.9 1.2° Circinus
NGC 5749
Easy
Open cluster
Open Cluster mag 9.0 2.2° Lupus
Zeta Lup
Easy
Easy double, sep 71.7″
Double Star mag 3.41 2.6° Lupus
NGC 5925
Easy
Open cluster
Open Cluster mag 8.0 3.4° Norma
NGC 5715
Easy
Open cluster
Open Cluster mag 10.0 4.3° Circinus
V Cen
Medium+
Pulsating variable, period 5.5d
Variable Star mag 6.93 5.1° Centaurus
NGC 5927
Easy
Globular cluster — dense ball of ancient stars
Globular Cluster mag 8.3 5.2° Lupus
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