Hemisphere:  Northern  ·  Contains:  Cigar Galaxy  ·  Cigar galaxy  ·  M 82  ·  M82  ·  NGC 3034
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M82 (Deeper), 



    
        

            KuriousGeorge
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M82 (Deeper)

Imaging telescopes or lenses: Planewave CDK24

Imaging cameras: FLI Proline 16803

Mounts: Planewave L600

Guiding cameras: Starlight Xpress Ultrastar

Focal reducers: None

Software: PixInsight 1.8  ·  Sequence Generator Pro  ·  Photoshop CS3  ·  PHD Guiding 2  ·  CCDWare CCD Inspector  ·  Planewave PWI4  ·  Planewave PWI3  ·  Maxim DL6

Filters: Astrodon 50 mm 5 nm Ha

Accessory: FLI CFW-5-7  ·  Astrodon Monster MOAG  ·  Hedrick Focuser  ·  Planewave Delta-T  ·  Planewave EFA


Dates:April 22, 2020

Frames:Astrodon 50 mm 5 nm Ha: 40x1800" -30C bin 1x1

Integration: 20.0 hours

Darks: ~20

Flats: ~20

Flat darks: ~20

Bias: ~20

Avg. Moon age: 28.98 days

Avg. Moon phase: 0.34%

Mean SQM: 21.30


Astrometry.net job: 3461700

RA center: 9h 55' 53"

DEC center: +69° 40' 44"

Pixel scale: 0.468 arcsec/pixel

Orientation: -178.559 degrees

Field radius: 0.216 degrees


Resolution: 2399x2304

Locations: KG Observatory, Julian, CA, United States

Data source: Backyard

Description

Didn't think I could get deeper than my prior attempt with 28 hours of 5 nm Ha captured by Adam Block in his 32" - with the moon out...

Prior "Deep" attempt

Here's my 20 hours of 5 nm Ha captured over the last 4 days between 8:30 PM and 1:30 AM PST. I was pleased to discover I could get noticeably deeper with 24" vs 32" and 20 hours vs 28 hours - but no moon with a 21.3 SQM sky all 4 days.

Red-colored Ha was very carefully screened over LRGB to preserve all the Ha detail. Adam's stacked and deconvolved Ha has 1.78" FWHM vs my 1.92" FWHM, so there's a minor loss of Ha detail. The deeply exposed M82 core in Ha was significantly dimmed using both PI HDR and PS Shadows/Highlights to help preserve the natural RGB after the Ha screening process.

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Author

KuriousGeorge
KuriousGeorge
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M82 (Deeper), 



    
        

            KuriousGeorge