NGC 3509 (Arp 335) spiral galaxy of type SA(s)bc pec in the constellation of Leo. Arp 335 is in the
miscellaneous category in the Arp atlas. Taken April 05, 06 and May 03, 04, 2022. Imaged with
Starlight Xpressí SX-825 camera and a Celestron EdgeHD 9.25 at f10, on a Losmandy G11/Gemini mount.
The L subframes were 10 minutes binned 1x1, while the RGB subframes were 4 minutes binned 2x2,
resulting in the following total exposures L:R:G:B (in min) = 450:64:64:64. Captured with
Nebulosity, calibrated, sigma combined in Siril with other processing using PixInsight LE,
Photoshop CS and GIMP. North is up.