Sh2-261, Lower's Nebula
Discovered in 1939, Lower's Nebula is in Orion
Hover over the picture for an annotated version
Date: 5 February 2024
FOV: Apporoximately 2° 32' × 1° 41'
Telescope: Stellarvue SVX102T + SFFR.74 reducer (523mm f/5.25)
Guiding: ZWO ASI120MM mini mono guide camera,
Stellarvue F050G 50mm guide scope
Computer: ASIair pro Raspberry Pi
Mount: iOptron CEM40
Camera: ZWO ASI071MC Pro Cooled (-10°C) Color CMOS with gain 240
Pixel size: 4.78 μm
Resolution: 1.882 arcsec/pixel
Frames:5 Feb 2461 × 240 seconds × 240 gain
Filter: Optolong L-eNhanced 2" Light Pollution Dual Band Filter
Stacking: Sixty-one 240 second frames using Pixinsight
Calibration: 20 darks, 20 flats, and 20 dark flats
Total Time: 4 hours and 4 minutes
Processing: Pixinsight – SPCC, DBE, SPCC, BlurXT, NoiseXT, HST, GHS, MStr,
PMath add MStr, GHS, HST, StarXT, Stars and Starless,
Stars Sat, Starless HDR8, PMath blend, Scale
Location: Darling Hill Observatory near Vesper, NY
