Wondering if anyone could shed some light on these sub photos from a set I was shooting of Betelgeuse.
I began the shoot then left my mobile phone for a while. When I returned, there was a very noticeable anomaly in the photo.
When I looked in the subfolder, I found two photos (shown in this post) in which the anomaly can be seen. The first, if you look closely, shows the beginning of what I can only describe as a flare. The second photo shows the flare fully developed. The other two photos are from either side of the two with the anomaly.

I would like to hear people's thoughts on what has occurred here. It may just be a lens aberration or something else that can be easily explained by someone with more experience in astrophotography.