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Sombrero Galaxy (Deep), 



Sombrero Galaxy (Deep)

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 50mm L

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

Dates:May 15, 2020May 24, 2020

Frames:Astrodon 50mm L: 22x1800" -30C bin 1x1

Integration: 11.0 hours

Darks: ~20

Flats: ~20

Flat darks: ~20

Bias: ~20

Avg. Moon age: 12.33 days

Avg. Moon phase: 22.16%

Mean SQM: 21.70

Basic astrometry details job: 3553680

Resolution: 4927x5527

Locations: KG Observatory, Julian, CA, United States

Data source: Backyard


During this time of the year we see very dark skies due to a marine layer at lower altitude. That along with less lights during quarantine allows us to see 21.7+ SQM skies. (-:

After seeing this deep exposure of the Sombrero Galaxy, I thought I'd try the same with the Planewave CDK24...

M104 Deep by Benjamin Csizi with 500mm ChileScope
Discussion on APOD site

Now what you see here is tricky. Could some of this be due to my optics? Not sure, but the thick faint stem protruding down with the faint tail off to the right seems like a possible ancient migration?

Processing was minimized to preserve as much as possible with no deconvolution nor gradient removal. Flats were taken very carefully in a completely dark space with an Altinak Flat-Man panel.

Wondering if I should go deeper, especially if this may not be an optical artifact caused by the bright galaxy?


Captured another 11x1800 to the North to see what may be happening there.



License: None (All rights reserved)


  • Sombrero Galaxy (Deep), 


  • Final
    Sombrero Galaxy (Deep), 




Description: Mosaic to look for tidal stream to the North.

Sky plot

Sky plot


Sombrero Galaxy (Deep),