Tuesday, September 3, 2024

Messier 101 (The Pinwheel Galaxy)


The Pinwheel Galaxy, also known as M101, is a spiral galaxy that measures 170,000 lightyears across and is located 25 million lightyears away from Earth in the Ursa Major constellation. The galaxy is about twice the diameter of our own galaxy the Milky Way and is thought to contain about 1 trillion stars.

Imaging Telescope: Vixen ED81s f/7.7 

Mount: Skywatcher HEQ5 Synscan Pro (belt mod) 

Camera: QHY 533M 

Filter Wheel: QHY CFW3S-SR 

Guiding camera: ZWO ASI120MM Mini (mono)

Guidescope: SkyWatcher EvoGuide 50ED

Constellation: Ursa Major

Date: 19 Aug 2024 

Location: Albireo Observatory 3, Achaia, Greece

Sky brightness: B2

Exposure Time: 

L: 6x120 sec (gain: 56.00, offset: 12.00) 0°C bin 1×1 

R: 6x120 sec (gain: 56.00, offset: 12.00) 0°C bin 1×1 

G: 6x120 sec (gain: 56.00, offset: 12.00) 0°C bin 1×1 

B: 6x120 sec (gain: 56.00, offset: 12.00) 0°C bin 1×1 


Acquisition: N.I.N.A v3 

Processing: Pixinsight, Photoshop

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