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[Pinwheel Galaxy - M101]

First picture for a while I did. The Pinwheel Galaxy - M101.

 

Haven't many days and weeks clear sky but the last couple of nights it wasn't bad at all.

 

Messier 101, or M101, also known as NGC 5457 and the Pinwheel Galaxy, is a spiral galaxy in the constellation Ursa Major. It has an apparent size of 28.8′ × 26.9′ and an apparent magnitude of 7.5.

 

Stars

1 trillion

Constellation

Ursa Major

Brightness

7.9

Radius

85,000 light-years

Coordinates

Right ascension 14h 3m 13s | Declination +54° 20′ 57″

Visible mass

~1,000 billion M☉

Apparent size

26.9′–28.8′

 

(Wikipedia)

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Mount: SkyWatcher HEQ5 Pro

 

Guiding: ZWO ASI 120MM Mini USB 2.0 Mono Camera - Orion 50mm Guide Scope

Filter: LPS-D2

Camera: Canon EOS 70D (full spectrum modified)

Askar 80 PHQ F7.5 Quadruplet Astrograph Telescope

Focal length: 600mm

ISO 800 - f7.5

26.5 hours LPS-D2 filter

Single frames: 300 sec

Darks: 80 frames

Flats: 80 frames

Bios: 80 frames

DarkFlats: 80 frames

 

Bortle 5/6

 

Apps: NINA > PHD2 > ASCOM > EQMOD > PixInsight >Photoshop

RC Astro: StarXTerminator > NoiseXTerminator > BlurXTerminator

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Uploaded on March 19, 2026