Location: St. Croix Observatory (SCO)
Date: 2025-09-21
Time: 10:28 PM ADT
S&T Chart Reference: 67, 69
Instrument: 10" Meade SCT, 25mm (used SvBony 30-10mm Zoom eyepiece FMC)
Transparency: Excellent (5)
Seeing: Very Good (4)
SQM: not recorded
Temperature: not recorded

M21 easily found above the Lagoon Nebula (M8). It appears Mohave a central bright star with a 'circle' of stars. A hint of nebulosity was evidenced. Only a few bright stars - no core detected.

Constellation:  Sagittarius
Type: Open Cluster
Magnitude: 5.9
Distance: 4.25 kly
Size: 13.0'

 

 

 

 

Constellation:  Sagittarius
Type: Open Cluster
Magnitude: 6.9
Distance: 4.9 kly
Size: 10.0'