Observation by Alan Thomas: M18 Open Cluster in Saggitarius

Uploaded by

Alan Thomas

Observer

Alan Thomas

Observed

2024 Jun 04 - 03:24

Uploaded

2024 Jul 08 - 10:39

Objects

M18

Equipment

42cm CDK17 corrected Dall-Kirkham f/6.8
ProLine KAF-09000 camera
10Micron GM4000 mount

Exposure

2min.

Location

Observatorio del Teide, Tenerife

Target name

M18 Open Cluster in Sagittarius

Title

M18 Open Cluster in Saggitarius

About this image

This small, faint, relatively young open cluster was discovered by Charles Messier in June 1764. It is challenging to locate because of its sparseness (Class II3p) and its setting against the rich star fields in Sagittarius, as this COAST image shows. It is difficult to imagine how Messier managed to identify it at all!

Apparent mag 7.5. Diameter c.18ly. Distance c.3,900ly. Age c.30million yrs.

Files associated with this observation

M18 COAST open cl Sagg v3image-jpeg-i.jpeg (141.0 kB)

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