NGC 7538 in Cepheus is home to the largest yet discovered protostar.
Also included are the Bubble Nebula, Cave Nebula, Lobster Claw Nebula, and M52.
Hover over the picture for an annotated version
Date: 12 October 2023
FOV: 6° 29' × 4° 19'; the angular size of Sh 2-157 (the Lobster Claw) is about 1.5°
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
Pixel size: 3.76 μm
Resolution: 2.595 arcsec/pixel
Filter: Optolong L-Ultimate 2" Light Pollution Dual Band Filter
Stacking: Sixty-five 240 second 300 gain frames using Pixinsight
Calibration: 20 darks, 20 flats, and 20 dark flats
Total Time: 4 hours and 20 minutes
Processing: Pixinsight – SPCC, DBE, BlurXT, NoiseXT, GHS, Sat, and Scale
Location: Stony Creek Boat Launch near Henderson, NY
