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Collinder 89 — Open Cluster in Gemini

Open Cluster Good (56/100)
OpenCluster Gemini Visible
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1Properties

Magnitude 5.7
Angular Size 60 arcmin
Open Cluster

Position & Identifiers

RA 06h 17m 60.0s
Dec +23° 37' 60.0"
Constellation Gemini
Catalog Cr 89

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 Nov – Jan (peak: Dec)

4 Eyepiece View

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30x TFOV: 1.7° Lim. mag: 13.6
N E

Collinder 89 · 60.0′ diameter · N up, E left

5 Best Magnification

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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.

6 Gem
Easy
Mira-type variable, range 5.7–8.1
Variable Star mag 6.39 1.5° Gemini
M35
Shoe-Buckle Cluster
Easy
Open cluster
Open Cluster mag 5.3 2.2° Gemini
NGC 2158
Easy
Open cluster
Open Cluster mag 8.6 2.4° Gemini
IC 2157
Easy
Open cluster
Open Cluster mag 8.4 3.0° Gemini
NGC 2175
Easy
Rich open cluster
Open Cluster mag 6.8 3.8° Orion
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