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Coma Star Cluster — Open Cluster in Coma Berenices

Open Cluster Excellent (71/100)
Magnitude 1.8m OpenCluster Coma Berenices Visible
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1Properties

Magnitude 1.8
Angular Size 120 arcmin
Distance 280 ly
Open Cluster

Position & Identifiers

RA 12h 25m 06.0s
Dec +26° 06' 00.0"
Constellation Coma Berenices
Catalog Mel 111
Physical size
9.8 light-years across — about 2.2× the Sun-to-Alpha-Centauri distance

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 Feb – Apr (peak: Mar)

4 Eyepiece View

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19x TFOV: 2.3° Lim. mag: 13.6
N E

Coma Star Cluster · 120.0′ diameter

5 Best Magnification

Discover

6

Light Travel Time Machine

7

Relativistic Travel

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.

12 Com
Easy
Easy double, sep 64.9″
Double Star mag 4.81 0.6° Coma Berenices
NGC 4251
Medium
Bright spiral galaxy
Galaxy mag 12.0 2.6° Coma Berenices
NGC 4147
Medium+
Compact globular cluster
Globular Cluster mag 10.3 8.3° Coma Berenices
Show on Map

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