Menu

NGC 609 — Open Cluster in Cassiopeia

Open Cluster Fair (34/100)
Magnitude 11.0m OpenCluster Cassiopeia (Cas) Visible
Star Map
+ List + Plan Star Hop

Observe

1Properties

Magnitude 11.0
Angular Size 4.8′
Cl, S, pRi, st 14...

Position & Identifiers

RA 01h 36m 23.7s
Dec +64° 32' 11.8"
Constellation Cassiopeia (Cas)
Catalog NGC 609

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. Medium Hard+ Hard
150mm Newt. Easy Medium+ Medium
C8 203mm Easy Easy Medium+
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 Sep – Nov (peak: Oct)

4 Eyepiece View

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

NGC 609 · 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 637
Easy
Open cluster
Open Cluster mag 8.2 0.9° Cassiopeia
C8
NGC 559
Easy
Open cluster
Open Cluster mag 9.5 1.4° Cassiopeia
NGC 654
Easy
Rich open cluster
Open Cluster mag 6.5 2.8° Cassiopeia
IC 166
Medium
Open cluster
Open Cluster mag 11.7 3.2° Cassiopeia
SU Cas
Hard+
Pulsating variable, period 1.9d
Variable Star mag 5.80 8.6° Cassiopeia
NGC 281
Medium+
Emission nebula — try an OIII filter
Emission Nebula mag 7.0 9.5° Cassiopeia
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
Cassiopeia
Mythology, bright stars, and deep-sky highlights.
Constellation
Mars
Polar caps, dust storms, and observing its oppositions.
Deep dive
}