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 Double Cluster in Perseus 


NGC884
NGC869
   

About:
Some 7,000 light-years away, this pair of open or galactic star clusters is an easy binocular target, a lovely starfield in the northern constellation Perseus. Also visible to the unaided eye from dark sky areas, it was cataloged in 130 BC by Greek astronomer Hipparchus. Now known as h and chi Persei, or NGC 869 and NGC 884, the clusters themselves are separated by only a few hundred light-years and contain stars much younger and hotter than the Sun. In addition to being physically close together, the clusters' ages based on their individual stars are similar - evidence that both clusters were likely a product of the same star-forming region. [Text from APOD]

Optics: Takahashi FSQ-106EDXIII F/3.6 383mm. - APO Refractor
Mount: SW HEQ5 Pro
Camera: ATIK 383L+ with SX USB Filter Wheel
Filters: Baader LRGB 2"
Guiding Systems: SX OAG with SX Lodestar
Dates/Times: 29 August 2011
Location: Pragelato - Turin - Italy
Exposure Details: R:G:B => 12:12:12 = > (4x3):(4x3):(4x3) All Bin1 [num x minutes]
Cooling Details: -20 C
Acquisition: Maxim DL/CCD, Perseus
Processing: CCDStack, PixInsight, PS CS2
Mean FWHM: 3.29
SQM-L: 21.07