OBJECT INFORMATION

Name/Designation	Messier 106 (NGC 4258) & Companion Galaxies
Object Type	Spiral Galaxy
Constellation	Canes Venatici
Distance	~22.5 million light-years
Apparent Magnitude	~8.4
Angular Size	~18′ (~0.3°)

IMAGING

Date	May 19 & 23, 2023
Location	Athens, Greece
Frames	258 × 60″ exposures
Integration	4h 18m
Camera Settings	Gain 101 | Temperature: -5°C
Bortle Scale	8/9 (City sky)

EQUIPMENT

Telescope	Sky-Watcher Explorer 130PDS
Camera	ZWO ASI533MC Pro
Mount	Sky-Watcher EQ5 Pro
Filter	Baader UV/IR Cut
Accessory	Baader 2″ MPCC Mark III
Guide Scope	Artesky 32mm Mini
Guide Camera	ZWO ASI120MM Mini

SOFTWARE

Acquisition	Astro Photography Tool
Guiding	PHD2 Guiding
Processing	PixInsight
Plugins	RC Astro