Hemisphere:  Southern  ·  Constellation: Hydra (Hya)
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Abell 35 - A Stromgren Sphere, 



    
        

            Logan Carpenter
Abell 35 - A Stromgren Sphere
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Abell 35 - A Stromgren Sphere

Getting plate-solving status, please wait...
Abell 35 - A Stromgren Sphere, 



    
        

            Logan Carpenter
Abell 35 - A Stromgren Sphere
Powered byPixInsight

Abell 35 - A Stromgren Sphere

Equipment

Imaging Telescopes Or Lenses
Sky-Watcher SkyWatcher Esprit 120ED
Imaging Cameras
ASI1600MM Cooled
Mounts
iOptron CEM120
Filters
Baader LRGB · Optolong Ha 7nm 2" · Optolong OIII 7nm 2"
Accessories
Pegasus Astro Focus Cube 2 · ZWO EFW 2in Filter Wheel
Software
PixInsight 1.8 8-1 Pixinsight · Sequence Generator Pro v3.0 Seqence Generator Pro · PHD 2 · photoshop cc 2019
Guiding Telescopes Or Lenses
Orion 60mm guidescope
Guiding Cameras
ZWO ASI290MM Mini

Acquisition details

Dates:
April 28, 2021 ·  April 30, 2021 ·  May 2, 2021 ·  May 5, 2021
Frames:
Baader LRGB: 28x600" (4h 40') (gain: 120.00) -10°C bin 1x1
Optolong Ha 7nm 2": 15x1200" (5h) (gain: 120.00) bin 1x1
Optolong Ha 7nm 2": 20x1200" (6h 40') (gain: 120.00) -10°C bin 1x1
Optolong OIII 7nm 2": 23x1200" (7h 40') (gain: 120.00) -10°C bin 1x1
Integration:
24h
Darks:
30
Flats:
40
Flat darks:
40
Avg. Moon age:
19.88 days
Avg. Moon phase:
69.62%
Bortle Dark-Sky Scale:
6.00
Temperature:
15.50

Basic astrometry details

Astrometry.net job: 4496473

RA center: 12h53m33s.1

DEC center: -22°5110

Pixel scale: 1.513 arcsec/pixel

Orientation: 272.100 degrees

Field radius: 0.687 degrees

Resolution: 2652x1910

Data source: Backyard

Description

While looking for a planetary nebula to image that would be of reasonable size for my Skywatcher 120, I came across Abell35 and although having a very low surface brightness, I thought it might be a good challenging object. I had never heard of a Stromgren sphere until I started reading about this target and was surprised to read that the Rosette nebula was also an example of a Stromgren sphere. I also thought the "bow wave" in front and wrapping around the sides of the central star was also an interesting feature.

This is most integration time I have spent on an object so far and after seeing the individual 20 min Ha and OIII subs, I was concerned that I would have little to show for all the time spent but was pleasantly surprised by the amount of detail I was able to capture.

Comments

Revisions

    Abell 35 - A Stromgren Sphere, 



    
        

            Logan Carpenter
    Original
  • Final
    Abell 35 - A Stromgren Sphere, 



    
        

            Logan Carpenter
    B

Sky plot

Sky plot

Histogram

Abell 35 - A Stromgren Sphere, 



    
        

            Logan Carpenter

In these public groups

Southern Hemisphere Astro