Celestial hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  Extremely wide field
M101 Pinwheel Galaxy, Jaimie Thomas
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M101 Pinwheel Galaxy

M101 Pinwheel Galaxy, Jaimie Thomas
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M101 Pinwheel Galaxy

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Description

This photo of M101 was taken 6/21/20, my second night ever using an EQ mount and ever attempting astrophotography. Total integration time was 90 minutes. FITS were collected from 12:13 AM until 2:24 AM EDT. Best 90 out of 129 were stacked. Subs were 60s at 90 gain with ASI071 cooled to -17C using Hyperstar 4 (F2.2) with EdgeHD 9.25 and Optolong L-Pro filter. The session was conducted from my backyard under Bortle Class 5 sky. Calibration: 30 Darks, No Flats or Bias. Stacked in DeepSkyStacker 4.2.3 and processed in Photoshop with GradentXTerminator and Topaz Labs DeNoise AI. A zoom will make it obvious the polar alignment was off, but ... learning!

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  • M101 Pinwheel Galaxy, Jaimie Thomas
    Original
  • Final
    M101 Pinwheel Galaxy, Jaimie Thomas
    B

B

Description: Corrected image reversal due to use of Hyperstar and cropped to highlight the galaxy. Also backed off the black level adjustment to avoid clipping.

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M101 Pinwheel Galaxy, Jaimie Thomas