Open Cluster M46 (NGC2437)

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<Image : Open Cluster M46>
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<<Photography Data>>
Date: December 27th, 2002.
Location: Mito, Ibaraki, Japan.
SIGMA APO TELE MACRO 300mm F4.0 lens (diaphragm F5.54)
Vixen GP·D equatorial mount
automatically guided with D80mm f560mm refractor + ST-V
BITRAN cooled CCD camera BJ-41L(-18.0 °C)
IDAS Type Ⅲ RGB separation filter
R,G and B images were taken with 2×2 binning
Exposure: L;10min. ×4 frames
R,G and B;5 min. each
LRGB composition (total exposure time 55min.)
Image processed with StellaImage3 & The GIMP.

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