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Sh2-216 • Biggest Planetary Nebula in HOO, 



    
        

            Douglas J Struble
Sh2-216 • Biggest Planetary Nebula in HOO
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Sh2-216 • Biggest Planetary Nebula in HOO

Technical card


Dates:Dec. 23, 2019Feb. 14, 2020

Frames:
Astrodon OIII 3nm: 220x120" (gain: 200.00) -20C bin 1x1
Astronomik Ha 6nm 1.25'': 418x120" (gain: 200.00) -20C bin 1x1

Integration: 21.3 hours

Darks: ~50

Flats: ~50

Bias: ~250

Avg. Moon age: 23.67 days

Avg. Moon phase: 37.33%

Bortle Dark-Sky Scale: 8.00


Basic astrometry details

Astrometry.net job: 3307339

RA center: 4h 41' 29"

DEC center: +46° 33' 7"

Pixel scale: 2.318 arcsec/pixel

Orientation: 14.840 degrees

Field radius: 1.646 degrees


Resolution: 4008x3172

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

Data source: Backyard

Description

This is one of the hardest deep space objects I have ever had to process not only due to how faint it is, but also given the limited clear nights we get here in Michigan during the winter months. I was hoping to get more integration time on this, but as the milky way moves beyond the night's sky, I need to switch telescopes on my second rig for galaxy season.

This very large planetary nebula is the second closest to earth and is very faint. SH2-216 (aka GN 04.41.3, Simeis 288, Marsalkova 44, LBN 742, YM 22, GN 04.41.3), in Perseus, is the largest known PN; one of the closest (425 light years) and one of the oldest. Its apparent diameter is reported to be 1.6° (for comparison, the Moon diameter is 0.5°).

This PN is very diffuse with a brighter east border, probably due to the interaction with the interstellar medium.

Comments

Author

dugstruble
Douglas J Struble
License: None (All rights reserved)
2836
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Revisions

  • Sh2-216 • Biggest Planetary Nebula in HOO, 



    
        

            Douglas J Struble
    Original
  • Final
    Sh2-216 • Biggest Planetary Nebula in HOO, 



    
        

            Douglas J Struble
    F

F

Description: Did a little experimenting with the stars. I color shifted the HOO stars. While I did not capture RGB on the stars, I thought this looked a bit more natural.

Sky plot

Sky plot

Histogram

Sh2-216 • Biggest Planetary Nebula in HOO, 



    
        

            Douglas J Struble

In these public groups

Sharpless2 Objects