Observations of NGC7789
These are the observations available for NGC7789. If you have any of your own that you'd like to submit we'd love to put them on the website.
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NGC 7789 (Caroline's Rose) in Cassiopeia
NGC 7789, Caroline's Rose, can be found in Cassiopeia among the rich starfields of the Milky Way. It lies about 8,000 light-years away and is one of the oldest open clusters known. It was discovered in 1783 by Caroline Herschel and was catalogued by brother William.
The cluster looks like a flower in small telescopes, created by the cluster's nestled complex of stars and voids. It is estimated to be 1.6 billion years old, and many stars have evolved from the main sequence into red giants, thus giving the somewhat yellow cast.
This image of NGC 7789 was provided by David Davies and taken from Cambridge in the UK. The image comprises 1 hour each of RGB subs of five minutes exposure. To see more of David's work please visit his Flickr Photostream. Click on the image for the larger version. I captured the data in late September 2019 using one hour each of RGB data in five-minute subs. I processed the data in PixInsight and used the photometric colour calibration tool to fix the colours of the stars.
Image Details
- Telescope: APM 107 refractor
- Camera: QSI 583 with a Lodestar as off-axis guider
- Mount: Skywatcher EQ8
David Davies - (20 October 2019).
