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Sh2-170 - The Little Rosette Nebula in Ha & OIII, 


            Douglas J Struble
Sh2-170 - The Little Rosette Nebula in Ha & OIII

Sh2-170 - The Little Rosette Nebula in Ha & OIII

Technical card

Resolution: 2430x1942

Dates:Oct. 21, 2018Oct. 22, 2018Oct. 23, 2018Oct. 24, 2018

Astrodon Ha 5nm: 228x120" (gain: 200.00) -20C bin 1x1
Astrodon Ha 5nm: 206x240" (gain: 75.00) -20C bin 1x1
Astrodon OIII 3nm: 39x120" (gain: 200.00) -20C bin 1x1
Astrodon OIII 3nm: 105x240" (gain: 75.00) -20C bin 1x1

Integration: 29.6 hours

Darks: ~50

Flats: ~50

Bias: ~250

Avg. Moon age: 13.09 days

Avg. Moon phase: 95.64%

Bortle Dark-Sky Scale: 6.25 job: 2477340

RA center: 0.391 degrees

DEC center: 64.642 degrees

Pixel scale: 1.011 arcsec/pixel

Orientation: 357.747 degrees

Field radius: 0.437 degrees

Locations: Backyard Red Zone Observatory, Taylor, MI, Michigan, United States

Data source: Backyard


This is a more natural palette of the SHO version I processed before minus SII data.

Again, I combined data from my new 12" GSO f/4 Truss Newtonian with data from my friend Chuck's data from a Explore Scientific 127mm at f/7.5. It was an interesting experiment.

This small Sharpless object sits high in the northern fall sky north of SH2-171 which is a common object imaged and south of Abell 85, a supernova remnant. Often called the small rosette due to its resemblance to the original, this small Sharpless object is five times smaller in size and much less bright than the Rosette Nebula. Therefore it is not a common imaging target.



Douglas J Struble
License: None (All rights reserved)

Sky plot

Sky plot


Sh2-170 - The Little Rosette Nebula in Ha & OIII, 


            Douglas J Struble