Hemisphere:  Southern  ·  Constellation: Scorpius (Sco)  ·  Contains:  IC 4628
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Prawn revisited - IC 4628 in SHO APM130 with 0.75x reducer, 



    
        

            robonrome
Prawn revisited - IC 4628 in SHO APM130 with 0.75x reducer
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Prawn revisited - IC 4628 in SHO APM130 with 0.75x reducer

Getting plate-solving status, please wait...
Prawn revisited - IC 4628 in SHO APM130 with 0.75x reducer, 



    
        

            robonrome
Prawn revisited - IC 4628 in SHO APM130 with 0.75x reducer
Powered byPixInsight

Prawn revisited - IC 4628 in SHO APM130 with 0.75x reducer

Technical card

Imaging telescopes or lenses: APM LZOS 130/780

Imaging cameras: ZWO ASI294MM Pro

Mounts: iOptron CEM70

Guiding telescopes or lenses: PrimaLuceLab 240mm guide scope

Guiding cameras: zwo asi224 mc

Focal reducers: Riccardi RIRED-M63

Software: Photoshop CC  ·  Aries Production astro pixel processor  ·  StarTools 1.7

Filters: Antlia SII 3.5nm  ·  Antlia 3.5nm Ha  ·  Antlia 3.5nm OIII

Accessory: ZWO EAF Focuser  ·  ZWO EFW 36mm  ·  PrimaLuceLab ECCO ECCO  ·  PRIMALUCE LAB Eagle 3s


Dates:May 31, 2021

Frames: 144x300" (12h)

Integration: 12h

Avg. Moon age: 20.36 days

Avg. Moon phase: 68.61%


Basic astrometry details

Astrometry.net job: 4574828

RA center: 16h 57' 38"

DEC center: -40° 30' 39"

Pixel scale: 1.615 arcsec/pixel

Orientation: 183.051 degrees

Field radius: 1.074 degrees


Resolution: 2782x3895

Locations: Backyard, Brisbane, Queensland, Australia

Data source: Backyard

Description

I do like the prawn nebula. Maybe not quite the same detail and Lobster or Running Chicken, but plenty of interest and a lot of fainter background nebulosity that frames the brighter portions.

I imaged this earlier in the year, but with a straight flatenner which at 780mm FL on my APM stretched my guiding a tad.

So I've revisited over a couple of nights using the riccardi 0.75x reducer giving me 585mm and faster F4.5, so with the 12 hours here should be effectively gathering a lot more "light" than previous 11hour integration at F6.

Also decided to do this one in portrait orientation for a bit more differentiation than simply a wider field shot of previous image.

Stacked into separate Ha, OIII, and SII channels in APP and recombined as SHO in Startools 1.7.

Comments

Sky plot

Sky plot

Histogram

Prawn revisited - IC 4628 in SHO APM130 with 0.75x reducer, 



    
        

            robonrome