When is the best time to observe NGC 7235?

NGC 7235 is best observed from July through September, with peak visibility during August when it transits around midnight in the Northern Hemisphere.

Where is NGC 7235 located in the sky?

NGC 7235 lies in the constellation Cepheus at right ascension 22h 12m and declination +57° 16′.

What telescope do I need to see NGC 7235?

At magnitude 7.7, NGC 7235 is easy in 7×50 or 10×50 binoculars.

NGC 7235 — Open Cluster in Cepheus

Open Cluster Good (45/100)

Magnitude 7.7^m OpenCluster Cepheus (Cep) Visible

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1Properties

Magnitude 7.7

Angular Size 4 arcmin

Description

Cl, pC, has a ruby *10

Position & Identifiers

RA 22h 12m 25.0s

Dec +57° 16' 16.7"

Constellation Cepheus (Cep)

Catalog NGC 7235

Physical size

15 light-years across — about 1.7× the Sun-to-Sirius distance

2How easy to spot?

Telescope	Bortle 3	Bortle 4	Bortle 5
80 mm refractor 80mm refr.	Easy	Easy	Easy
150 mm Newton 150mm Newt.	Easy	Easy	Easy
Celestron C8 (203 mm SCT) C8 203mm	Easy	Easy	Easy

Easy Medium Hard Very hard Impossible

Bortle 3 = rural · 4 = outer suburbs · 5 = suburbs

Medium on Seestar S50

At 150mm under B5 skies you should resolve about 20 of 171 members.

3Visibility

Set a location in User Settings to see visibility data.

Best season Jul – Sep (peak: Aug)

4 Eyepiece View

Telescope Eyepiece

125x TFOV: 0.4° Lim. mag: 13.6

NGC 7235 · 4.0′ diameter

5 Best Magnification

6Where this cluster sits in time

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.