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NGC 2451 — Open Cluster in Puppis

Open Cluster Showpiece (75/100)
Magnitude 2.8m OpenCluster Puppis (Pup) Visible
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1Properties

Magnitude 2.8
Angular Size 37.5′
Cl, vvL, vlC, one *4.5

Position & Identifiers

RA 07h 45m 15.0s
Dec -37° 58' 02.6"
Constellation Puppis (Pup)
Catalog NGC 2451

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 Dec – Feb (peak: Jan)

4 Eyepiece View

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50x TFOV: 1.0° Lim. mag: 13.6
N E

NGC 2451 · 37.5′ 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 2477
Easy
Rich open cluster
Open Cluster mag 5.8 1.5° Puppis
V336 Pup
Easy
Colorful double, sep 26.5″
Double Star mag 5.52 4.7° Puppis
NGC 2546
Easy
Rich open cluster
Open Cluster mag 6.3 5.3° Puppis
Pi Puppis Cluster
Easy
Open cluster
Open Cluster mag 2.1 5.7° Puppis
NGC 2439
Easy
Rich open cluster
Open Cluster mag 6.9 6.3° Puppis
L2 Pup
Easy
Mira-type variable, range 2.6–6.2
Variable Star mag 5.10 8.9° Puppis
NGC 2328
Hard+
Elliptical galaxy
Galaxy mag 12.55 9.1° Puppis
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