H & Chi Persei - The
Double Cluster
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CROP OF THE CLUSTER
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From SEDS.ORG: The famous double cluster in Perseus was known in
ancient times
(probably even pre-historically), and first cataloged by the Greek
astronomer Hipparcos.
Both clusters are situated in the Perseus OB 1 association and are
only a few hundred light-years apart and at a distance from us of over
7000 light
years.
O'Meara and Green (2003) point out some historical confusion
about the identity of the designations or names of the objects "Chi"
and "h" Persei. As they point out, since the 1840s, the name "Chi" is
attributed to NGC 884, and "h" to NGC 869. However, these authors point
out that very probably, Tycho Brahe measured one position for the
"nebulous star" that is actually the double cluster, and Johann Bayer
designated this "star" as Chi. Probably, he used the name "h Persei"
for a fainter nearby star.
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ST11000 on Takahashi FSQ F/5 Fluorite Refractor w Robofocus
4
x 5 min each in RGB
Mount: AP900GTO
Acquired, Flats and Darks, Alignment in
CCDSoft5
Sigma Reject combine in Maxim
Levels and curves
in PS CS2
Flesherton, Ontario
August 30th 2008
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