R Coronae Borealis

Last night I used the two Canon 200mm lenses and M26C Trius OSC CCDs to image the left hand half of Corona Borealis – the idea eventually to make a 2-frame mosaic showing the whole of the constellation.  When I processed the image this morning I was very surprised to see that R Coronae Borealis was blazing away (relatively speaking) at magnitude 8.  Why was this such a surprise?  Because when I imaged the same star in August 2013 with the 3 x Sky 90s for quite some time I was really disappointed to find that I could hardly see the thing.  Looking it up on Wikipedia I saw that it was not only at its minimum, but it had also been down there for the longest period in its (recorded) history.  So at that point I forgot all about R Coronae Borealis – until this morning 🙂

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