Contains: The star πSco, The star 4Sco, The star 3Sco, The star 2Sco, The star 1Sco
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Sharpless 2-1 and the rule of thirds

Technical card

Imaging telescope or lens: Takahashi FSQ106n

Imaging camera: Canon 5Da Mark II

Mount: Astro-Physics AP MACH1 GTO

Guiding telescope or lens: Takahashi FSQ106n

Guiding camera: Sbig STi-i

Software: Diffraction Limited MaximDL 6 ProPixInsight

Resolution: 5394x3447

Dates: June 30, 2017

Frames: 14x600"

Integration: 2.3 hours

Avg. Moon age: 6.88 days

Avg. Moon phase: 44.64% job: 1648551

RA center: 238.298 degrees

DEC center: -26.125 degrees

Pixel scale: 2.501 arcsec/pixel

Orientation: -13.541 degrees

Field radius: 2.224 degrees

Locations: Home Observatory, Sydney, NSW, Australia


Sharpless 2-1 is a very faint reflection nebula in Scorpio.

This image is framed such that you have an emission nebula lit up by the star PI-Sco to the right, then a reflection nebula that looks like a mirrored lower case h in the middle and a dusty star region over to the left.

Dark skies needed for this. Imaged with an F5 scope at 10 minute subs so very faint indeed.




Sky plot

Sky plot


Sharpless 2-1 and the rule of thirds,