M 100

M 100 is a grand design intermediate spiral galaxy in the constellation Coma Berenices, 55 million light years from Earth. It was one of the first spiral galaxies ever recorded, discovered by Pierre Méchain on March 15, 1781.

This image was taken with our Officina Stellare RiLA 600mm f/5.0 telescope using an FLI ML16200 CCD camera cooled to -25C. Luminance detail was added to exposures taken through red, green and blue filters to create this full color image. Imaged and processed in Samphran, Thailand by the SC Observatory team: Mike Selby, Stefan Schmidt and Andy Chatman.


Object details

Galaxy in Coma Berenices

Right Ascension: 12h 22m 54.9s

Declination: +15° 49′ 21″

Magnitude: 9.5

Moon Age Average: 10.30 days

Moon Phase Average: 0.97 %

Imaging Setup


SC Observatory, Central Thailand

Mar 17, 2018, Mar 18, 2018 and Mar 19, 2018
Officina Stellare RiLA 600
Focal Length:
3000 mm
Paramount Taurus 600
FLI ML 16200
Image Scale:
0.41 arcseconds/pixel
Imaging Software:


Processing Software:

Adobe Photoshop

PixInsight 1.8

Exposure Detail

Filter Filter Brand Bin Qty Exposure
L Astrodon 1x 126 360
R Astrodon 2x 46 150
G Astrodon 2x 45 150
B Astrodon 2x 42 150

Total Exposure Time

18 hours, 8 minutes

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