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M18
| Type D Open Cluster
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between M17 and M24
| Sagittarius
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M21
| Type D Open Cluster
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| Sagittarius
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M23
| Type E Open Cluster
|
~120 stars
| Sagittarius
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M25
| Type D Open Cluster
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| Sagittarius
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M26
| Type F Open Cluster
| | Scutum
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M29
| Type D Open Cluster
|
~50 stars
| Cygnus
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M34
| Type D Open Cluster
| ~100 stars
| Perseus
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M36
| Type F Open Cluster
|
~60 stars similar to Pleiades
| Auriga
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M37
| Type F Open Cluster
|
~500 stars
| Auriga
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M38
| Type E Open Cluster
|
"pi" shaped
| Auriga
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M39
| Type E Open Cluster
|
~30 stars
| Cygnus
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M41
| Type E Open Cluster
|
~100 stars 4� south of Sirius
| Canis Major
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M46
| Type F Open Cluster
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| Puppis
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M47
| Type D Open Cluster
|
~50 stars
| Puppis
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M48
| Type F Open Cluster
|
~80 stars
| x
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M50
| Type E Open Cluster
|
~200 stars
| Monoceros
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M52
| Type E Open Cluster
|
| Cassiopeia
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M67
|
among oldest known ~500 stars, many sunlike ~200 white dwarfs
| Type F Open Cluster
| Cancer
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M103
| Type D Open Cluster
|
~170 stars
| Cassiopeia
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