M 21
M 21 is an open cluster composed of about sixty stars and is located in the constellation of Sagittarius, M 21 has a considerable concentration of stars for this type of object, being the distance v between the stars about one light year, the distance of the cluster is about 4,000 light years
SPECIFICATIONS
Telescope
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Camera
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Location
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Location
EL SAUCE OBSERVATORY, CHILE
Date of observation
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Date of observation
2025-05-23
Filters
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Processing
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Processing
Pixinsight and Photoshop
Credits
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Credits
Credit Sauro Gaudenzi / Data Telescope Live