Astrophotography Galaxy

Astrophoto: Triangulum Galaxy – Messier 33 – 02/21

The Triangulum Galaxy – A picture stacked out of exposures from a single evening. Some stumbling was mandatory …

Astrophoto: Triangulum Galaxy

Astrophoto: Triangulum Galaxy – Clear Sky 5.
It took me two tries or two evenings to get the exposures needes for the Triangulum Galaxy, Triangulum Nebula or Messier 33. The weather forecast told something about Sahara Dust around February 24th and we had close to full Moon. But just beginner like, i had to test it and shoot M33.

two times the same part of single frames with same exposure time and identical ISO. Left: February 24th with Saharadust and moon, Right: 4 days later under good viewing conditions.

At first i processed the data in PixInsight. After some weeks i started using Affinity Photo, stacked and post-processed the data again. Here is the high reolution Astrophoto on Flickr:

Triangulum Galaxy, M33

Lessons Learned

But since problems never come alone, I also had a problem on my exposures from february 28th:

A Spot - Triangulum Galaxy - Clear Sky 5
A spot in the middle of M33 … OMG!

The spot was an any of my lights i took that evening. Always in exactly the same position. A reproduction of it in daylight was not possible. Not even on FLATS! Therefore I tried to do exactly nothing, not to fiddle on my telescope or the camera and just go for another deep sky object. And well, the spot was away. Possibly it was an early insect or anything else. In this case i had to use an ordinary paint-clone or whatever tool to fix my M33 picture. That spot never came back again.

End of february, M33 comes closer to the horizon in the west. There is our city of Koblenz, which is makes a problem on my photos.

Technical Details of Astrophoto: Triangulum Galaxy – Clear Sky 5

TelescopeVIXEN ED80sf
Focal Length600mm
Aperture ratio7.5
Erecting Lense
MountSkywatcher HEQ-5
Goto-ControlCartes du Ciel
Mount ControlASCOM
Guiding Scope Focal Length162 mm
Guiding Camera Chip4.8mm x 3.6mm, 8bit
Guiding Camera Resolution1280×960
Guiding SoftwarePHD2, ASCOM Pulse
Dithering– (first time 12th, April 21)
CameraCANON EOS M100
Methodfocal projection
Camera angle
Camera ControliOS App CC&C
Photography Date28.02.2021
Exposure-Time Lights70x120s
SensitivityISO 800
CalibrationframesFlats, Darks, Bias
Post Processing Date17.05.2021
Stacking, IntegrationAffinity Photo
Post Processing SoftwareAffinity Photo und SiriL
Image EditingAffinity Photo
Capture PlaceKoblenz, Deutschland
LightpollutionBortle 5
Scattered lightstrong

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