M3 Globular Cluster in SHO Narrowband Palette

M3 Globular Cluster in SHO Narrowband Palette

Thursday, March 26th, 2026 at 2:26:47 PM · 2026/Astrophotography

This astrophotography image showcases Messier 3 (M3), a spectacular globular cluster containing hundreds of thousands of ancient stars gravitationally bound in a spherical formation. Captured using a TMB-92 APO telescope and ZWO ASI533MM Pro monochrome camera, the image combines narrowband filters (SII, Ha, OIII) in the SHO palette with luminance and RGB data for enhanced detail. The dense core shows brilliant white concentration while individual stars can be resolved throughout the outer regions. The 4.5-hour total integration time reveals the cluster's remarkable structure against the deep black backdrop of space, with field stars and distant background galaxies visible in the frame.

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