Celestial hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  M 101  ·  NGC 5457  ·  NGC 5477
M101 Galaxy, Hojong Lin
M101 Galaxy
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M101 Galaxy

M101 Galaxy, Hojong Lin
M101 Galaxy
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M101 Galaxy

Equipment

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Acquisition details

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Description

Data was collected in two separate nights: 17 March 2018 and 23 March 2018. Total integration time was 8 hours, LRGBHa = 3:1:1:1:2 hours.

Telescope used was Takahashi Mewlon-250 CRS @ f/10. Imaging camera was Apogee 16803 CCD.

I was surprised to see Mewlon-250CRS had such a large image circle. The shape of star remains quite good to the corners.

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M101 Galaxy, Hojong Lin