Location: St. Croix Observatory (SCO)
Date: 2025-09-21
Time: 10:40 PM ADT
S&T Chart Reference: 67
Instrument: 10" Meade SCT, 40mm eyepiece
Transparency: Good (3)
Seeing: Very Good (4)
SQM: 20.90
Temperature: 6° C, very light breeze, no clouds
M18 is not very far from M17 so with patience I slewed to find it. A very sparse cluster - very few stars. Some websites state it's credited with only 40 members; however, I found several small stars in its vicinity. Did not see any evidence of nebulosity.
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Constellation: Sagittarius Type: Open Cluster Magnitude: 6.9 Distance: 4.9 kly Size: 10.0' |