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Reclassified information | Astronomy Magazine
Michael P. Caligiuri of Carlsbad, California CTB 1 (Abell 85) is a faint supernova remnant in Cassiopeia, about 9,800 light-years away. Originally classified by George Abell as a planetary nebula, it is more than half a degree across, larger in apparent size than a full Moon. This Hα/OIII/RGB image was taken with a 4.2-inch refractor atContinue reading “Reclassified Information”
https://www.astronomy.com/uploads/2024/09/Abell85_FSQ-1568×1133.jpg
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September 24, 2024
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Michael P. Caligiuri of Carlsbad, California

CTB 1 (Abell 85) is a faint supernova remnant in Cassiopeia, about 9,800 light-years distant. Originally classified by George Abell as a planetary nebula, it is more than half a degree across, larger in apparent size than a full Moon. This Hα/OIII/RGB image was taken with a 4.2-inch refractor at f/5 and 8.25 hours of exposure.