The starfield in eastern Cassiopeia containing an abundance of open star clusters. The most prominent is NGC 663, aka the Letter S Cluster, at bottom.

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The starfield in eastern Cassiopeia containing an abundance of open star clusters. The most prominent is NGC 663, aka the Letter S Cluster, at bottom. Above it is NGC 654; to its right is NGC 659. At centre is Messier 103. At far right is NGC 457, the ET or Owl Cluster. Above it is NGC 463. The star at far left is Epsilon Cass; the star at right of centre is Delta Cas, aka Ruchba. The x 5° field is close to a binocular field of view. This is a stack of 15 x 4-minute exposures with the SharpStar 61mm apo refractor at and with the Canon R6 at ISO 800. Taken from home Oct. 1, 2021. Diffraction spikes added with Astronomy Tools actions.

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Size: 5400px × 3610px
Photo credit: © Alan Dyer / VWPics / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 1, 5, 6, 7, 457, 463, 559, 61mm, 654, 663, astrograph, astronomy, binocular, cass, cassiopeia, cluster, cz, galaxy, m103, messier, mgen3, ngc, open, owl, phi, r6, ruckba, sharpstar, star, tools, trumpler