Caph Star

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Jaspal Chadha

London

Location : London (UK)
Date: 31/10/2015
Telescope: Skywatcher 100ED
CCD: QHY9S MONO
Chroma LRGB at 5 x 120seconds
Mount: Ioptron CEM60

Cassiopeiae is a yellow-white hued sub giant or giant of stellar class F2III-IV, with a surface temperature of 6,700 Kelvin. More than three times the size of and 28 times brighter than the Sun, Caph has an absolute magnitude of +1.16. It was once an A-type star with about double the Sun’s mass. It is now in the process of cooling and expanding to become a red giant. Its core is likely to have used up its hydrogen and is shrinking and heating, while its outer envelope of hydrogen is expanding and cooling. Stars do not spend much time in this state and are relatively uncommon. Caph’s corona is unusually weak.

2015-10-31T00:00:00

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