S Coronae Borealis with Celestron Origin

One of the variable stars that I am imaging with Origin for at least a year is Mira-type S Coronae Borealis. I have uploaded two downloadable pdf files of the captured 1.27° x 0.85° fields of view to my website for 7 August and 14 December 2024. This is a time separation of 129 days. The period of S CrB is about 360 days so there should be a significant dimming of S over this interval. There is indeed. You can see this in the two images.

I have identified seven comparison stars ranging from 6.88 to 13.79 V to cover most of S CrB’s range. Given the typical (but non-statistical) spread in the measurements submitted to AAVSO around the last maximum (July-August 2024), a magnitude or so, and considering the differences in colour indices of S CrB versus the comparison stars, Origin is doing well as a first-order optical monitoring instrument.

As usual, I also identified some of the numerous galaxies in the FOV of the August file, as well as included a few references.

Dennis
Kempt Shore, Nova Scotia, Canada
Lattitude 45°N
Website: https://celestronorigin.space