M4 and Antares in Scorpius and the Rho Ophiuci Cloud Complex.

Hover over the picture for an annotated version

Date:  6 and 7 July 2024

FOV:  13° 19' × 8° 53'; the angular size of M4 is about 23'

Telescope:  Canon EF 75-300mm Telephoto Zoom Lens (99.90mm FL)

Guiding:  tracking only

Computer:  ASIair pro Raspberry Pi

Mount:  iOptron CEM40

Camera:  ZWO ASI6200MC Pro Cooled (-10°C) Color CMOS with gain 100

Pixel size:  3.76 μm

Resolution:  7.888 arcsec/pixel

Filter:  Optolong UV/IR cut

Stacking:  one hundred and forty-two frames using PixInsight

71 frames × 120 sec

22 frames × 240 sec end of 6 July 2024 session

49 frames × 120 sec end of 7 July 2024 session

Total Time:  5 hours and 28 minutes

Processing:  Pixinsight – SPCC, DBE, SPCC, BlurXT, NoiseXT, MStr, GHS, HST,

PMath Msk + GHS + HST → PM,

Location:  Cherry Springs State Park near Coudersport, PA