Celestial hemisphere:  Southern  ·  Constellation: Sculptor (Scl)  ·  Contains:  NGC 253  ·  Sculptor galaxy
NGC 253, davebowman
NGC 253
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NGC 253

NGC 253, davebowman
NGC 253
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NGC 253

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Description

I got very good conditions last week end in the desert so I decided to catch a few photons from this fascinating object which is quite low above the horizon. I had to do everything between 40 and 30 degrees elevation. I wish I could have done more colors but unfortunately I have set my tent at the wrong place :-(

Overall, I really like how it came out :-) Nevertheless, I have a wrong distance between the focal reducer and the sensor: I'm too short so that takes me to f7 instead of f6.3 and the coma is very annoying :-( It is also noticeable that the coma is not symmetric (more right than left). I did a very good collimation on the field just before shooting: I achieved a very nice Airy pattern thanks to my planetary camera (QHY5l-IIm), a 2.7x barlow and Metaguide software. Hence, I can't explain this strong coma on the right side unless I have got a tilt in my imaging chain...

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    NGC 253, davebowman
    Original
    NGC 253, davebowman
    B

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NGC 253, davebowman