Rosette Nebula NGC 2237 et.al. in Narrow Band Ha, O3 and S2. Taken with Vixen ED80 Doublet Refractor, Dual Band Ha/O3 and O3/S2 Filters and a Modified Canon 550D. 20 x Ha/O3 and 42 x O3/S2 individual frames/exposures taken over 2 nights 25th and 26th January 2026.

The Rosette Nebula, Caldwell 39 or NGC 2237 and the central star cluster NGC 2244, the light from which causes the Nebula to emit and glow in it's own light.   Approximately 5000 light years away and 100 light years across.  Our sun and it's neighbouring star, Rigil Kentaurus, would sit very closely, relatively speaking, inside the centre of the this nebula,
 

No more clear nights now for a few days and just just as well as I need to catch up on some sleep. Although once I set the telescope up over these 2 nights it was pretty much 'set and forget and sleep tight' with the ASIair telescope computer controlling the imaging, tracking, guiding and meridian flip. But it doesn't serve you breakfast in the morning. ZWO could add that functionality in perhaps in the next firmware update.

Anyhow this was another step forward for me getting data with 2 sets of filters and combining them in the Pixinsight Image Processing program

Raw Frame from , slightly enhanced, 5 Minutes Exposure.