When is the best time to observe NGC 2169?

NGC 2169 is best observed from November through January, with peak visibility during December when it transits around midnight in the Northern Hemisphere.

Where is NGC 2169 located in the sky?

NGC 2169 lies in the constellation Orion at right ascension 06h 08m and declination +13° 58′.

What telescope do I need to see NGC 2169?

At magnitude 5.9, NGC 2169 is easy in 7×50 or 10×50 binoculars.

NGC 2169 — Open Cluster in Orion

Open Cluster Good (57/100)

Magnitude 5.9^m OpenCluster Orion (Ori) Visible

Star Map + List + Plan Star Hop

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1Properties

Magnitude 5.9

Angular Size 7.2′

Description

Cl, S, lRi, pmC, ** (ADS 4728)

Position & Identifiers

RA 06h 08m 24.4s

Dec +13° 57' 53.6"

Constellation Orion (Ori)

Catalog NGC 2169

Physical size

7.3 light-years across — about 1.7× the Sun-to-Alpha-Centauri 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

Easy on Seestar S50

At 150mm under B5 skies you should resolve about 21 of 57 members.

3Visibility

Set a location in User Settings to see visibility data.

Best season Nov – Jan (peak: Dec)

4 Eyepiece View

Telescope Eyepiece

125x TFOV: 0.4° Lim. mag: 13.6

NGC 2169 · 7.2′ 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.