Targets / Messier M7

Astrophotoguru™ · Ptolemy's Cluster

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Messier M7

Ptolemy's Cluster

Open Cluster
Scorpius
Beginner
Angular size
80′
Magnitude
3.3
Best months
May-Aug
Constellation
Scorpius
Catalog IDs
M7
Common aliases
NGC 6475
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Recommended telescopes

Askar
Askar FRA500
500mm f/5.6 · 90mm aperture
Frames 50% of APS-C FOV
Takahashi
Takahashi Epsilon-180ED
500mm f/2.8 · 180mm aperture
Frames 50% of APS-C FOV
Askar
Askar SQA85
500mm f/5.8 · 85mm aperture
Frames 50% of APS-C FOV
Sky-Watcher
Sky-Watcher Evolux 82ED
499mm f/6.1 · 82mm aperture
Frames 49% of APS-C FOV
William Optics
William Optics RedCat 91
496mm f/5.5 · 91mm aperture
Frames 49% of APS-C FOV
SharpStar
SharpStar 94EDPH
518mm f/5.5 · 94mm aperture
Frames 51% 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

Askar FRA500 + ZWO ASI6200MC Pro
FOV 4.13° × 2.75°
Scale 1.55″/px
Target fills 48% of frame
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Takahashi Epsilon-180ED + ZWO ASI6200MC Pro
FOV 4.13° × 2.75°
Scale 1.55″/px
Target fills 48% of frame
Preview in planner
Askar SQA85 + ZWO ASI6200MC Pro
FOV 4.13° × 2.75°
Scale 1.55″/px
Target fills 48% of frame
Preview in planner

Related open clusters

Messier M24
Sagittarius Star Cloud
Messier M44
Beehive Cluster
NGC NGC 869/884
Double Cluster
Messier M48
Open Cluster M48
Messier M41
Open Cluster M41
Messier M34
Open Cluster M34
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