Celestial hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  M 101  ·  NGC 5455  ·  NGC 5457  ·  NGC 5461  ·  NGC 5471  ·  NGC 5477
M101 Pinwheel Galaxy, Steve Sells
M101 Pinwheel Galaxy
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M101 Pinwheel Galaxy

M101 Pinwheel Galaxy, Steve Sells
M101 Pinwheel Galaxy
Powered byPixInsight

M101 Pinwheel Galaxy

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Description

M101 is a spiral galaxy about 21 million lightyears away. Its diameter is about 170 thousand lightyears. That compares to a diameter of about 100 thousand lightyears for our own Milky Way Galaxy, which is also a spiral galaxy. M101 is believed to contain at least a trillion stars.

This is the first picture I've completed since I got the iOptron CEM40 and the second since I got the ZWO ASI2600MC.

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  • M101 Pinwheel Galaxy, Steve Sells
    Original
  • Final
    M101 Pinwheel Galaxy, Steve Sells
    F

F

Description: Re-processing with more care at each step, and using PixInsight's new Normalize Scale Gradient script this time, yielded a significantly better result.

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M101 Pinwheel Galaxy, Steve Sells

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Imaged with APT
SF Bay Area Imagers