Hemisphere:  Southern  ·  Constellation: Serpens (Ser)  ·  Contains:  Eagle Nebula  ·  IC 4703  ·  M 16  ·  NGC 6611  ·  Star Queen
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The Eagle Nebula in SHO, 



    
        

            robonrome
The Eagle Nebula in SHO
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The Eagle Nebula in SHO

Getting plate-solving status, please wait...
The Eagle Nebula in SHO, 



    
        

            robonrome
The Eagle Nebula in SHO
Powered byPixInsight

The Eagle Nebula in SHO

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 22, 2021

Frames: 132x300" (11h)

Integration: 11h

Avg. Moon age: 10.21 days

Avg. Moon phase: 78.26%


Basic astrometry details

Astrometry.net job: 4542879

RA center: 18h 19' 0"

DEC center: -13° 55' 37"

Pixel scale: 1.617 arcsec/pixel

Orientation: 356.998 degrees

Field radius: 1.072 degrees


Resolution: 4005x2602

Locations: Backyard, Brisbane, Queensland, Australia

Data source: Backyard

Description

This is made up of exposures taken over 4 consecutive nights collecting around 5-6hours a night.

Unfortunately I seem to be getting some very poor guiding on this and other targets that pass near the zenith. Even with good numbers on guiding well under 1 arc sec I'm getting a lot of oval or extended stars that seem to relate to RA oscillation (RA moves ~2x Dec). Not sure if it's flexure or just unbalanced at zenith or both... anyway as a result I culled more than half the subs and they still aren't great.

For subjects further south I have really good guding and nice round stars...just the zenith area - so anything in the -20 to -35 dec range for me here in Brisbane Australia seems to cause me troubles. I'm trying a greater amount of ra "unbalance" tonight and will see how that goes with some imaging on the Swan Nebula.

I have a new 3.5in feathertouch focusser coming next month to replace out the stockl focusser on my APM130 that I hope will help a little. We'll see.

Stacked into separate channels in APP and then combined and processed in Startools 1.7 with final tweaks in PS.

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The Eagle Nebula in SHO, 



    
        

            robonrome