Observation by Kevin Gurney: Arp 104

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Kevin Gurney


Kevin Gurney


2022 Aug 03 - 23:00


2022 Aug 04 - 18:08



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Ursa Major

Field centre

RA: 13h32m
Dec: +62°43'
Position angle: -0°49'

Field size

0°15' × 0°13'

  • Fornax 102
  • Celestron C11 Edge HD
  • ZWO ASI1600MM pro
  • Atik EFW2
  • Baader LUM Filter

18 subs, 30s each, bin 1x1


Charente, France

Target name

Arp 104


Arp 104

About this image

Number 104 in Arp's catalogue of Peculiar Galaxies. This one warrants entry because it contains a spiral linked to an elliptical by a stream of matter. Recording this stream was the challenge... I think its just about there, but focus was hard for some reason. Taken in the middle of a heatwave, the nighttime temperature doesn't dip much below 25C so maybe some kind of OTA warping? I'll find out when it cools down! 1.5hrs of exposure in total. Acquired in Voyager, processed in PI.

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Tim Haymes
Tim Haymes, 2022 Aug 05 - 21:05 UTC

Very nice indeed. I was comparing to my own LRGB effort of 2min subs (6+6+6+6) (48min).
You have a lot more in Luminance

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