H & Chi Persei - The
Double Cluster
Click on the image to see it at 2X the above size but still 50% of the full resolution
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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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Scope: Astro-Physics AP110GTX w 0.8x TCC
Mount: SB Paramount MyT
Camera: ZWO ASI6200MC Pro
Guiding: Unguided
Exposures: 39 x 5min = 3 hrs 15min
Acquired using TSX
Processing
in PixInsight: WBPP, CombineChannels, GradientCorrection,
ColourCalibratoin, SetiAstro Statistical Stretch, masked boost to
saturation. Save for Web
Lucknow, Ontario
October 2025
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