LBN 420 is a molecular cloud in the constellation Lacerta.
My favorite name for it is Galileo's Finger.
Hover over the picture for an annotated version
Date: 18 and 19 September 2025
FOV: Approximately 4° 30' × 3°
Telescope: Askar FRA300 pro (300mm f/5 Petzval)
Guiding: ZWO ASI120MM mini mono guide camera,
SVBony SV165 Mini 40mm f/4 guide scope
Computer: ASIair pro Raspberry Pi
Mount: ZWO AM5 mount
Camera: ZWO ASI6200MC Pro Cooled (-10°C) Color CMOS
set to APS/c mode with gain 100
Pixel size: 3.76 μm
Resolution: 2.593 arcsec/pixel
Frames:18 September 202557 × 300 seconds × 100 gain
19 September 202538 × 300 seconds × 100 gain
Filter: Optolong UV/IR cut filter
Stacking: sixty-six 300 second frames using Pixinsight
Calibration: 20 darks, 20 flats, and 20 dark flats
Total Time: 7 hours and 55 minutes
Processing: Pixinsight – SPPC, DBE, SPCC, BlurXT, NoiseXT, DynCrop → Linear
MStr, GHS, HST, PMath MStr + GHS + HST → Stars, Sat,
StarXT, MStr, GHS, HST, PMath MStr + GHS + HST → Starless,
Sat, PMath ~(~Stars*~Starless) → Blend, scale
Location: Cherry Springs State Park near Coudersport, PA 18 September 2025
Darling Hill Observatory near Vesper, NY 19 September 2025
