Hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  M 101  ·  NGC 5457  ·  NGC 5477
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M101 The Pinwheel Galaxy, 


            Yuichi Kawamoto
M101 The Pinwheel Galaxy
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M101 The Pinwheel Galaxy

Technical card

Imaging telescopes or lenses: Celestron EdgeHD 1100

Imaging cameras: Canon EOS 6D  ·  QHYCCD QHY16200A Mono

Mounts: CEM60

Guiding telescopes or lenses: Celestron EdgeHD 1100

Guiding cameras: ASI290MM

Focal reducers: Celestron REDUCER LENS .7X - EDGEHD 1100

Software: Main Sequence Software Seqence Generator Pro 3  ·  PixInsight 1.8

Filters: H-Alpha  ·  TS Optics 2'' L Filter

Dates:Feb. 22, 2020Feb. 23, 2020

55x60" ISO3200
TS Optics 2'' L Filter: 30x300" -20C bin 1x1
H-Alpha: 6x300" -20C bin 2x2

Integration: 3.9 hours

Darks: ~10

Flats: ~25

Bias: ~50

Avg. Moon age: 28.95 days

Avg. Moon phase: 0.61%

Basic astrometry details

Astrometry.net job: 3287157

RA center: 14h 3' 11"

DEC center: +54° 20' 49"

Pixel scale: 0.675 arcsec/pixel

Orientation: 180.467 degrees

Field radius: 0.525 degrees

Resolution: 4566x3251

Data source: Traveller


Long absence mainly because weather condition and my availability did not meet... The first "get-back" image is M101, tons of failures and mistakes during the exposure sessions. And the processing is not adequate yet, it may take some time to regain skills. Note that RGB is obtained from DSLR, while L and Halpha are from cooled CCD.


Sky plot

Sky plot


M101 The Pinwheel Galaxy, 


            Yuichi Kawamoto