Cookie consent

AstroBin saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing AstroBin without changing the browser settings, you grant us permission to store that information on your device.

I agree
Contains:  NGC 2175, NGC 2174
Getting plate-solving status, please wait...
The Monkey Head Nebula (NGC 2175), 





    
        

            Luca Marinelli
The Monkey Head Nebula (NGC 2175)

The Monkey Head Nebula (NGC 2175)

Technical card

Resolution: 2895x2505

Dates:Nov. 22, 2018Dec. 6, 2018Dec. 8, 2018Dec. 19, 2018Dec. 20, 2018Dec. 26, 2018

Frames:
Astrodon Narrowband 5nm Ha: 8x1200" -30C bin 1x1
Astrodon Narrowband 5nm Ha: 15x900" -30C bin 1x1
Astrodon Narrowband 5nm OIII: 13x1200" -30C bin 1x1
Astrodon Narrowband 5nm OIII: 8x900" -30C bin 1x1
Astrodon Narrowband 5nm SII: 20x900" -30C bin 1x1

Integration: 17.8 hours

Darks: ~40

Flats: ~20

Bias: ~100

Avg. Moon age: 14.39 days

Avg. Moon phase: 60.34%

Bortle Dark-Sky Scale: 5.00

Astrometry.net job: 2652261

RA center: 92.460 degrees

DEC center: 20.594 degrees

Pixel scale: 1.436 arcsec/pixel

Orientation: 179.312 degrees

Field radius: 0.764 degrees

Locations: Home Observatory, Schenectady, New York, United States

Data source: Backyard

Description

The Monkeyhead Nebula (NGC 2174-2175) is an emission nebula in the constellation Orion, close to the Jellyfish Nebula in Gemini.

Processing workflow:

- PI: Drizzle Integration, DBE, deconvolution, linear noise reduction on each channel Ha, OIII, SII

- PI: Masked stretch, TGVD, SHO channel combination, magenta star halo removal

- starnet: remove stars from SHO

- Photoshop CC: Use the mask generated by starnet and Content Aware fill to remove residual artifacts from starless SHO image

- Photoshop CC: ColorMask tool to remap SHO palette, LRGB combination with Ha master, sharpening with High Pass filter on starless luminance, contrast adjustments

- PI: Downsample to original pixel size, Color noise reduction with ACDNR, final sharpening, Dark Structure Enhance

Comments

Author

lucam_astro
Luca Marinelli
License: None (All rights reserved)
3414
Like

Revisions

  • The Monkey Head Nebula (NGC 2175), 





    
        

            Luca Marinelli
    Original
  • The Monkey Head Nebula (NGC 2175), 





    
        

            Luca Marinelli
    C
  • The Monkey Head Nebula (NGC 2175), 





    
        

            Luca Marinelli
    D
  • The Monkey Head Nebula (NGC 2175), 





    
        

            Luca Marinelli
    E
  • Final
    The Monkey Head Nebula (NGC 2175), 





    
        

            Luca Marinelli
    G

C

Improved local contrast and raised black point, slightly.

D

Adjusted color palette and blue black point.

E

Animation showing the workflow to create a starless chrominance SHO image with starnet and Adobe Photoshop CC.

G

Complete reprocess following suggestions by Chris Gomez to improve noise reduction.

Sky plot

Sky plot

Histogram

The Monkey Head Nebula (NGC 2175), 





    
        

            Luca Marinelli