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Sh2-235 • Rare Collision Nebula in HSS, 



    
        

            Douglas J Struble
Sh2-235 • Rare Collision Nebula in HSS
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Sh2-235 • Rare Collision Nebula in HSS

Technical card


Dates:Jan. 21, 2020Feb. 19, 2020

Frames:
Astrodon Ha 5nm: 387x120" (gain: 200.00) -20C bin 1x1
Astrodon SII 3nm: 303x120" (gain: 200.00) -20C bin 1x1

Integration: 23.0 hours

Darks: ~50

Flats: ~50

Bias: ~250

Avg. Moon age: 25.95 days

Avg. Moon phase: 13.85%

Bortle Dark-Sky Scale: 8.00


Basic astrometry details

Astrometry.net job: 3290507

RA center: 5h 41' 17"

DEC center: +36° 3' 46"

Pixel scale: 0.649 arcsec/pixel

Orientation: 51.201 degrees

Field radius: 0.494 degrees


Resolution: 4396x3264

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

Data source: Backyard

Description

I ended up totally reworking this. This is one of the few Ha and SII bicolor palettes I have processed. Sh2-235 is very unusual in that SII is way more prominent than OIII. While SII falls more in the red spectrum, I liked the way the texture popped more with the SII mapped in blue. My second goal was to pull out more detail in the core of Sh2-235.

SH2-235, as designated in the Sharpless catalog. It is a kidney shaped HII region formed when two large clouds of gas collided. The nebula is part of a larger complex consisting of SH 231,232 and 233. The complex lies in the constellation Auriga. The distance to SH2-235 is somewhat unclear. Observations made with the WISE space telescope indicate it lies between 5,219 and 8,154 light years from the Earth. Other estimates place it approximately 6,000 light years distance. Infrared studies of the object reveal extensive formation of new clusters of stars embedded within the cold clumps of gas and dust within the nebula.

Comments

Author

dugstruble
Douglas J Struble
License: None (All rights reserved)
1981
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Revisions

  • Sh2-235 • Rare Collision Nebula in HSS, 



    
        

            Douglas J Struble
    Original
  • Sh2-235 • Rare Collision Nebula in HSS, 



    
        

            Douglas J Struble
    B
  • Final
    Sh2-235 • Rare Collision Nebula in HSS, 



    
        

            Douglas J Struble
    C

B

Description: Shifting SII data to blue to add texture.

C

Description: Trying to find a happy medium between the original and the final. I think this fits the bill.

Sky plot

Sky plot

Histogram

Sh2-235 • Rare Collision Nebula in HSS, 



    
        

            Douglas J Struble

In these public groups

Sharpless2 Objects