Hemisphere:  Southern  ·  Contains:  Great Nebula in Orion  ·  IC 430  ·  M 42  ·  M 43  ·  NGC 1973  ·  NGC 1975  ·  NGC 1976  ·  NGC 1977  ·  NGC 1980  ·  NGC 1981  ·  NGC 1982  ·  NGC 1999  ·  The star 42Ori  ·  The star 45Ori  ·  The star 49Ori  ·  The star θ1Ori  ·  The star θ2Ori  ·  The star ιOri  ·  The star υOri
M42 & NGC1975, 


            Emanuele Todini
M42 & NGC1975
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Technical card

Imaging telescopes or lenses: Borg 71FL

Imaging cameras: Canon / CentralDS EOS 60D

Mounts: Sky-Watcher EQ-6 Skyscan

Guiding telescopes or lenses: Borg 50 Achromat 50/250

Focal reducers: Borg Super reducer

Software: PixInsight  ·  Binary Rivers Backyard EOS

Dates:March 9, 2013

Frames: 25x360" ISO1600 -20C

Integration: 2.5 hours

Avg. Moon age: 27.09 days

Avg. Moon phase: 6.58%

Basic astrometry details

Astrometry.net job: 98212

RA center: 5h 35' 8"

DEC center: -5° 16' 55"

Pixel scale: 8.048 arcsec/pixel

Orientation: -88.612 degrees

Field radius: 2.686 degrees

Resolution: 2000x1333


The Great Orion Sword is one of the most known winter sky objects, and one of the most imaged portion of the sky. Visible by naked eye during winter, lies at the center of Orion Costellation.
I imaged it with my new Borg 71FL, with a focal length of 280mm (using #7879 reducer, @ f3.9), under very dark skies. The seeing was really poor and this affected the shape of starts, that are all “bloated”.

On my blog you can find the full process workflow in Pixinsight.



Emanuele Todini
License: None (All rights reserved)

Sky plot

Sky plot


M42 & NGC1975, 


            Emanuele Todini