NGC 3718, NGC 3729 & Hickson 56

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Location / Date

Zellerndorf, April - May 2017

Telescope / Mount / Guiding

ASA 10" Astrograph, ASA 3" Wynne-Corrector (focal length 910 mm)
ASA DDM60, no Guiding

Camera / Exposure

FLI ML8300 with Astrodon filters

L 55 x 10min, RGB 15 x 10min each

Total exposure time: 16h 40min


PixInsight, Fitswork, Photoshop


NGC 3718 (Arp 214) and NGC 3729 are barred spiral galaxys. The peculiar S-shaped disturbed arms of NGC 3718 is believed due to gravitational interaction with the smaller NGC 3729.

Hickson Compact Group (HCG) 56 (Hickson 56) consists of five galaxies and is about 400 million light years from us.

This area in the constellation Ursa Major is very rich in even smaller and fainter galaxies.

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