Description: - Open Cluster
of roughly 40 stars in Cassiopeia. Also known as NGC581.
Apparent brightness of 7.4 magnitude and 6 arc minutes in size.
Estimated to be 10kly (3 kpc) away and 22My old. Camera: SBIG STT-8300M @ -35C
Sensor Temperature using Baader RGB filters Telescope: AP130EDT refractor,
1085mm at f/8.3 Exposure: 15 x 3 minutes each
colour for 135 minutes total exposure time. Location: RASC Calgary's WCO,
Alberta, under bright moonlit (88% full) skies. Date: 2023-12-23, at -20C and
99%Rh condensing
Processed in PixInsight with RCAstro tools, SPCC and
GraXPert.
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