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5 hours ago, Stickey said:

I also think this is lens flare. Sirius is the brightest star in the sky and your using ISO 3600 and 32s exposures? I think that might be OTT.

Try reducing the ISO and/or the exposure duration. 

The cause is the cover glass in front of the very small sensor on your phone. I've had  similar reflections of bright objects in the night sky just using the phone on its own, never mind concentrating then through an eyepiece. 

Experiment and see what makes a difference. 

 

Mike

Thank you so much for the suggestion, I'll see if it helps next time I'm out.

9 hours ago, Cornelius Varley said:

It appears to be lens flare somewhere in the imaging train.

Is there anyway I can correct for / fix it?

9 hours ago, Cornelius Varley said:

Please upload the image in either jpg or png format so it can be viewed within the browser.

I've just uploaded it as a jpg

Hi, 

As above I was trying to image Sirius and was getting strange ellipses radiating out from the star.

I was using a Celestron 127SLT on a GOTO mount and a 20mm eyepiece. I took the picture with my phone, with ISO 3600 and 32s exposure.

Can anyone tell me why I might be seeing this and how I might be able to fix it. I have never noticed this before doing similar exposures of Arcturus.

Thank you

IMG_20220929_041239077.dng