Hemisphere:  Northern  ·  Constellation: Lyra (Lyr)
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Kronberger 61 (Kn 61) / Soccer Ball Nebula, 



    
        

            Chris Sullivan
Kronberger 61 (Kn 61) / Soccer Ball Nebula
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Kronberger 61 (Kn 61) / Soccer Ball Nebula

Getting plate-solving status, please wait...
Kronberger 61 (Kn 61) / Soccer Ball Nebula, 



    
        

            Chris Sullivan
Kronberger 61 (Kn 61) / Soccer Ball Nebula
Powered byPixInsight

Kronberger 61 (Kn 61) / Soccer Ball Nebula

Technical card

Imaging telescopes or lenses: TPO/GSO RC8

Imaging cameras: QHYCCD 183

Mounts: SkyWatcher EQ6-R Pro

Guiding telescopes or lenses: Orion Thin Off-Axis Guider (TOAG)

Guiding cameras: ZWO 290MM Mini

Focal reducers: Astro-Physics CCDT67 - 0.67x Reducer

Filters: QHYCCD QHYCFW3S - 3rd Generation Small Thin 7 position Filter Wheel  ·  Optolong Green 1.25"  ·  Optolong Red 1.25"  ·  Optolong Blue 1.25"  ·  OIII


Dates:June 14, 2019June 15, 2019June 23, 2019June 24, 2019June 27, 2019July 9, 2019July 10, 2019July 11, 2019July 13, 2019July 14, 2019July 15, 2019July 20, 2019July 21, 2019July 25, 2019Aug. 30, 2019Aug. 31, 2019Sept. 4, 2019Sept. 8, 2019Sept. 11, 2019Sept. 20, 2019Sept. 21, 2019Sept. 22, 2019

Frames:
Optolong Blue 1.25": 62x60" (gain: 10.00)
Optolong Green 1.25": 146x60" (gain: 10.00)
OIII: 184x300" (gain: 10.00)
OIII: 153x600" (gain: 20.00)
Optolong Red 1.25": 244x60" (gain: 10.00)

Integration: 48.4 hours

Avg. Moon age: 13.94 days

Avg. Moon phase: 63.36%

Bortle Dark-Sky Scale: 7.50


Basic astrometry details

Astrometry.net job: 3132919

RA center: 19h 21' 38"

DEC center: +38° 19' 1"

Pixel scale: 0.569 arcsec/pixel

Orientation: 269.851 degrees

Field radius: 0.326 degrees


Resolution: 3400x2350

Locations: Home Roof (Bortle 7-8 / Est. Sky Quality: 18.53), Springfield, PA, United States

Data source: Backyard

Description

Kn61 was given to me as a challenge by Pat Rogers after we had both done Fe6 and had a short discussion about what our most difficult targets had been up to that point. He said his was Kronberger 61. Yeah, this one was brutal. Insanely faint and with a very delicate structure - it was an extremely difficult target on several levels. I sat on these data for months because I just couldn't get anything I was satisfied with (I also messed up my capture and had red running instead of blue once). I started and stopped processing it several times, and each attempt barely looked any different from the previous one. I'm still a little dissatisfied, but the data I have are the data I have and I can't squeeze any more of them. I don't think I'd try this one again unless I can get a scope at least 12" in diameter or could image it from somewhere significantly higher in elevation than my usual ~90 m above sea level. You should definitely check out the images from the Gemini Observatory (twin 8 meter scopes at high elevation) and the Capella Observatory (12.9 meter scope) to see what this target really looks like - my 0.2 meter scope (and imaging conditions) are simply no match.

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