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NGC 7789 Cluster in Cassiopeia (90CFT RMod).jpg
This is the rich star cluster nicknamed Caroline's Rose, or officially NGC 7789, in Cassiopeia. Caroline Herschel, sister of William Herschel, discovered it in 1783. In the eyepiece its stars do take on the appearance of nested rose petals. Subtle effects like that are always lost in photos of star clusters.
The field of view is 4.7° by 3.1°.
This is a stack of 10 x 6-minute exposures with the Astro-Tech 90CFT refractor with the 0.8x Reducer for f/4.8 and the filter-modified Canon R at ISO 800. On the Astro-Physics 600E mount and autoguided with the MGENIII guider. No filter employed other than a UV/IR Cut filter.
The field of view is 4.7° by 3.1°.
This is a stack of 10 x 6-minute exposures with the Astro-Tech 90CFT refractor with the 0.8x Reducer for f/4.8 and the filter-modified Canon R at ISO 800. On the Astro-Physics 600E mount and autoguided with the MGENIII guider. No filter employed other than a UV/IR Cut filter.
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- © Alan Dyer/AmazingSky.com
- Image Size
- 6720x4480 / 22.2MB
- www.amazingsky.com
- Contained in galleries
- Star Clusters, NGC/IC Objects

