Menu

NGC 2509 — Open Cluster in Puppis

Open Cluster Good (45/100)
Magnitude 9.0m OpenCluster Puppis (Pup) Visible
Star Map
+ List + Plan Star Hop

Observe

1Properties

Magnitude 9.0
Angular Size 4.8′
Cl, B, pRi, lC, st S

Position & Identifiers

RA 08h 00m 47.8s
Dec -19° 03' 01.8"
Constellation Puppis (Pup)
Catalog NGC 2509

2How easy to spot?

Sign in and configure your equipment and default location to see a personalized row.
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

Easy on Seestar S50

3Visibility

Set a location in User Settings to see visibility data.

Best season Dec – Feb (peak: Jan)

4 Eyepiece View

Log in to set your own equipment
125x TFOV: 0.4° Lim. mag: 13.6
N E

NGC 2509 · 4.8′ 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 2479
Easy
Open cluster
Open Cluster mag 10.0 1.9° Puppis
NGC 2455
Easy
Open cluster
Open Cluster mag 10.0 3.6° Puppis
NGC 2432
Easy
Open cluster
Open Cluster mag 10.0 4.7° Puppis
NGC 2482
Easy
Open cluster
Open Cluster mag 7.3 5.4° Puppis
NGC 2438
Hard+
Planetary nebula — try an OIII filter
Planetary Nebula mag 10.0 6.3° Puppis
NGC 2517
Hard+
Bright spiral galaxy
Galaxy mag 12.3 6.8° Puppis
Show on Map

Explore Nightbase

Related knowledge, tools, and stories — no observation planning required.

The Life of Stars
From birth in a nebula to spectacular death — how stars are born, shine, swell, and die, and how to read the clues in their starlight.
Article
Puppis
Mythology, bright stars, and deep-sky highlights.
Constellation
Jupiter
The Great Red Spot, cloud belts, and the Galilean moons.
Deep dive
}