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Messier M4
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Globular Cluster M4
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Messier M4
Globular Cluster M4
Globular Cluster
Scorpius
Beginner
Near Antares.
Angular size
26′
Magnitude
5.6
Best months
May-Aug
Constellation
Scorpius
Catalog IDs
M4
Common aliases
NGC 6121
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Recommended telescopes
Celestron
Celestron C6 SCT
1500mm f/10.0 · 150mm aperture
Frames 48% of APS-C FOV
Astro-Tech
Astro-Tech AT8RC
1624mm f/8.0 · 203mm aperture
Frames 52% of APS-C FOV
Astro-Tech
Astro-Tech AT10RC
2000mm f/8.0 · 254mm aperture
Frames 64% of APS-C FOV
Celestron
Celestron EdgeHD 8
2032mm f/10.0 · 203mm aperture
Frames 65% of APS-C FOV
Meade
Meade LX200 8" ACF
2032mm f/10.0 · 203mm aperture
Frames 65% of APS-C FOV
Celestron
Celestron C8 SCT
2032mm f/10.0 · 203mm aperture
Frames 65% of APS-C FOV
Recommended cameras
ZWO
ZWO ASI2600MC Pro
3.76µm pixels · cooled
ZWO
ZWO ASI2600MM Pro
3.76µm pixels · cooled
ZWO
ZWO ASI6200MC Pro
3.76µm pixels · cooled
ZWO
ZWO ASI6200MM Pro
3.76µm pixels · cooled
ZWO
ZWO ASI533MC Pro
3.76µm pixels · cooled
ZWO
ZWO ASI533MM Pro
3.76µm pixels · cooled
Example framing
Celestron C6 SCT
+
ZWO ASI533MC Pro
FOV
0.43° × 0.43°
Scale
0.52″/px
Target fills
100%
of frame
Preview in planner
Astro-Tech AT8RC
+
ZWO ASI2600MC Pro
FOV
0.83° × 0.55°
Scale
0.48″/px
Target fills
78%
of frame
Preview in planner
Astro-Tech AT10RC
+
ZWO ASI533MC Pro
FOV
0.32° × 0.32°
Scale
0.39″/px
Target fills
134%
of frame
Preview in planner
Related globular clusters
Messier M5
Globular Cluster M5
Messier M13
Great Hercules Cluster
Messier M10
Globular Cluster M10
Messier M22
Great Sagittarius Cluster
Messier M55
Globular Cluster M55
Messier M3
Globular Cluster M3
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Imaging planner
celestron-c6-sct
Messier M4 — Globular Cluster M4