Unveiling the Rosette Nebula: A Blooming Star Nursery in Monoceros

This deep-sky image captures the Rosette Nebula (NGC 2237–2244), a vast emission nebula located about 5,200 light-years away in the constellation Monoceros, the Unicorn.
The nebula spans nearly 1.3 degrees across the sky—more than two and a half times the width of the full Moon—and glows with ionized hydrogen, oxygen, and sulfur gas energized by a cluster of hot young stars at its center, NGC 2244.

These massive newborn stars emit intense ultraviolet radiation and powerful stellar winds, carving out a central cavity and sculpting the surrounding clouds into intricate shapes. The Rosette Nebula is one of the Milky Way’s most active star-forming regions, often referred to as a cosmic rose blooming in space.

Telescope: Sky-Watcher Quattro 200P
Camera: ZWO ASI183MM Pro (mono, cooled)
Filters: Ha & OIII narrowband (mono filters)
Exposure:
• Ha: 40 × 180s = 2 hours
• OIII: 30 × 180s = 1 hour 30 minutes
Mount: iOptron HAE43
Guiding: Svbony 30mm + ZWO ASI120MM

Pixinsight and Photoshop