From Wikipedia: Sh2-33 is a molecular cloud in Serpens. It has also been described as a dark globule. It is very faint and has very little color, and must be observed in very dark skies.
The cloud contains 33 stars, and has faint magnetic activity. It is composed mostly of carbon and oxygen.

Camera: Apogee U16M (16803) w Astrodon Gen II filters
Scope: Planewave 12.5" CDK
LRGB 26/12/10/11 x 10 minutes
Paramount ME guided with an ST402ME and Astrodon MMOAG
TSX and CCD-Commander

All calibration and initial processing through to the RGB and separate Luminance in PixInsight. LRGB_Combine via PixInsight.
Cleanup in PS

Captured May 2026
Lucknow, Ontario