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

Hover over the picture for an annotated version

Date:  18 and 20 June 2023

FOV:  6° 38' × 4° 25'; the angular size of M4 is about 23'

Telescope:  Askar FRA300 pro (300mm f/5 Petzval)

Guiding:  ZWO ASI385MC planetary camera,

ZWO 30F4 30mm mini guide scope

Computer:  ASIair pro Raspberry Pi

Mount:  iOptron CEM40

Camera:  ASI6200MC Pro at -10°C

Pixel size:  3.76 μm

Resolution:  2.596 arcsec/pixel

Filter:  18 June – 35 × 240 sec, 100 gain, no filter,

20 June – 24 × 240 sec, 300 gain, Optolong L-eNhance narrow dual band filter

Stacking:  Fifty-nine 240 second frames using Pixinsight

Total Time:  3 hours 56 minutes

Processing:  Pixinsight – DBE, SPCC, BlurXTerminator, NoiseXTerminator,

Generalized Hyperbolic Stretch + Saturation, DynCrop/Scale

Location:  18 June – Darling Hill Observatory near Vesper, NY,

20 June – Stony Creek Boat Launch near Henderson, NY