In wide-field images Caroline's Rose (NGC 7789) is probably the most prominent DSO in the constellation Cassiopeia and yet this open cluster is absent from the Messier catalog. The cluster is about the same size as the full moon and it can apparently been seen with the naked eye under dark skies. Its brightest members are highly evolved orange giant stars and the cluster itself is quite old for an object of this type. It was discovered by Caroline Herschel in 1783.
I took this one week ago under Bortle 7 skies using a sequence of 15 second exposures with an unmodified, unfiltered Nikon Z30 and an Askar FMA180 Pro (40mm aperture, f/4.5). In this reproduction the limiting magnitude seems to be between 16.5 and 17.
Image processing with PixInsight and Photoshop 2025. You can click the preview to see the full-size, CN-hosted image (1600 x 1200 pixels) with additional details in the captions.
C&C welcomed and thanks for looking.
Attached Thumbnails
Edited by james7ca, 11 November 2024 - 06:17 AM.
