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Contains:  NGC 2175, NGC 2174
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NGC 2175 Monkey Head Nebula SHO - Esprit 120 - ASI1600MM, 





    
        

            Rowland Archer
NGC 2175 Monkey Head Nebula SHO - Esprit 120 - ASI1600MM

NGC 2175 Monkey Head Nebula SHO - Esprit 120 - ASI1600MM

Technical card

Resolution: 1980x1474

Dates:Nov. 18, 2017Nov. 23, 2017Nov. 26, 2017

Frames:
Astrodon H-alpha 5nm: 113x300" (gain: 200.00) -20C bin 1x1
OIII 3nm: 118x300" (gain: 200.00) -20C bin 1x1
SII 3nm: 103x200" (gain: 200.00) -20C bin 1x1

Integration: 25.0 hours

Darks: ~50

Flats: ~30

Bias: ~200

Avg. Moon age: 3.90 days

Avg. Moon phase: 23.05%

Bortle Dark-Sky Scale: 5.00

Mean SQM: 19.77

Astrometry.net job: 1960183

RA center: 92.354 degrees

DEC center: 20.610 degrees

Pixel scale: 2.106 arcsec/pixel

Orientation: 181.037 degrees

Field radius: 0.722 degrees

Locations: Home Observatory, Wake Forest, NC, United States

Data source: Backyard

Description

NGC 2175 Monkey Head Nebula - an early image from my Esprit 120, taken over quite a few nights in November 2017. Uncharacteristically, I only tossed a couple of frames this time.
I have been wanting to try Astro Pixel Processor so I used it for pre-processing. I'm happy with the results. I tried to use it for post-processing but IMO, the PixInsight tools are way ahead in ease of use, so I did post-processing in PI.

I have a tendency to go for contrast and make the bg a bit dark, so tried not to do that this time. Maybe my monitor makes the bg look darker than it does on other folks screens?

C&C always welcome!

Clear skies,
Rowland

Comments

Author

Vassar1976
Rowland Archer
License: None (All rights reserved)
1911
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Revisions

  • NGC 2175 Monkey Head Nebula SHO - Esprit 120 - ASI1600MM, 





    
        

            Rowland Archer
    Original
  • Final
    NGC 2175 Monkey Head Nebula SHO - Esprit 120 - ASI1600MM, 





    
        

            Rowland Archer
    B

B

Following Harry Rik's advice on CN, I used the free ON1 photo filtering program to tone down the bright interior of this image. I used the Sharpening tool and then Dynamic Contrast. It does introduce a tiny bit of noise, but I like the details it brought out, much like HDRMT in PI.

Sky plot

Sky plot

Histogram

NGC 2175 Monkey Head Nebula SHO - Esprit 120 - ASI1600MM, 





    
        

            Rowland Archer

In these public groups

ZWO ASI1600MM/QHY163M