NGC457 – Open Cluster in Cassiopeia

  • Description: - Open Cluster of roughly 60 stars in Cassiopeia. Also known as "The Owl Cluster" and "The Dragonfly Cluster" as it looks like a pair of bright eyes and a short wing span. Apparent brightness of 6.4 magnitude and 13 arc minutes in size. Estimated to be 7.9kly (2.4 kpc) away.

  • Camera: SBIG STT-8300M CCD

  • Telescope: Astro-Physics 130EDT

  • Exposure: 15 x 2 minutes each colour for 1hr 30 minutes total exposure time.

  • Location: RASC Calgary's WCO, Alberta, under bright moonlit (88% full) skies.

  • Date: 2023-12-23

  • Processed in PixInsight with RCAstro tools


  • Description: - This is the same cluster as above but imaged from within the City of Calgary with a different camera and exposures

  • Camera: ASI533mm CMOS

  • Telescope: Astro-Physics 130EDT

  • Exposure: 20 x 5 minutes each RGB for 5hrs total exposure time.

  • Location: Bright City of Calgary AB

  • Date: 2024-10-11

  • Processed in PixInsight with RCAstro tools

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