Object Information

• Name/Designation: Cocoon Galaxy (NGC 4490)

• Object Type: Barred Spiral Galaxy

• Constellation: Canes Venatici

• Distance from Earth: ~25 million light-years

• Apparent Magnitude: ~9.8

• Angular Size: ~6.3 arcminutes

Imaging Info

• Date: May 27, 28, 30 & 31, 2024

• Location: Athens, Greece

• Frames: 453 × 60″ exposures (7h 33m)

• Camera Settings: Gain 101 | Temperature: 0 °C

• Bortle Scale: 8/9 (City sky)

Equipment & Guiding

• Imaging Telescope: Sky-Watcher Explorer 130PDS

• Imaging Camera: ZWO ASI533MC Pro

• Mount: Sky-Watcher EQ5 Pro

• Filter: Baader UV/IR Cut Luminance 2″

• Accessory: Baader 2″ MPCC Mark III Newton Coma Corrector

• Guide Scope: Artesky 32mm Mini Guide Scope

• Guide Camera: ZWO ASI120MM Mini

Software

• Astro Photography Tool (APT)

• PHD2 Guiding

• PixInsight

• BlurXTerminator

• NoiseXTerminator

• StarXTerminator