Observation by John Hughes: IC 342 - The Hidden Galaxy

Uploaded by

Mr John William Hughes


John Hughes


2021 Nov 01 - 17:58


2021 Nov 07 - 11:37



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Field centre

RA: 03h46m
Dec: +68°04'
Position angle: +0°11'

Field size

1°45' × 1°19'

  • William Optics Z103 refractor
  • ZWO ASI1600mm Pro Cool camera
  • SkyWatcher EQ6R Pro mount
  • LRGB Chroma 1.25” filters

Gain 139, Offset 30


North Essex

Target name

IC 342 - The Hidden Galaxy


IC 342 - The Hidden Galaxy

About this image

Located in the constellation Camelopardalis, IC 342 is a large intermediate spiral galaxy some 10 million light years away. Given its size and distance IC 342 should be nearly 2 magnitudes brighter but for its location relative to our own.

Only discovered in 1892 by William Denning, it is thought it avoided detection for so long because it is positioned in dusty areas near the galactic equator of our own Milky Way which made it difficult to observe. Viewing through this cosmic dust gives it the reddish brown hue.

IC 342 is thought to be undergoing further star formation with Hii regions visible in the core and the spiral arms.


Files associated with this observation
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Grant Privett
Grant Privett, 2021 Nov 09 - 20:31 UTC

Hi there. Lovely image. Could you indicate the exposure lengths used?

Mr John William Hughes
Mr John William Hughes, 2021 Nov 10 - 07:52 UTC

Hello Grant,

Here is the information you asked for;

120 second exposures in LRGB with subframes as follows 22;30;30;30.

300 second exposures in LRGB with subframes 40;20;18;2 (clouds intervened whilst capturing the blue channel.

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