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Caliban (Uranus XVI)

Image

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About this observation
Observer
Paul Leyland
Time of observation
13/01/2020 - 23:00
Object
Caliban (Uranus XVI)
Observing location
Tacande Observatory, MPC J22
Equipment
0.4m Dilworth-Relay
SX Trius Pro 814
No filter
Exposure
356 30-second subs, average stacked (2h58m total)
Tags

It occurred that median co-addition tends to lead to noisier images than taking the average of the subs and, further, a little gentle smoothing might improve the visibility of such a faint object.  Accordingly, although the data going into this image is exactly the same as that in https://britastro.org/node/20438, the subs are average stacked and the result smoothed with a 3-pixel diameter, 0.3 pixel sigma Gaussian function.  Essentially the same contrast-stretching was used as in the earlier image.

In my opinion, Caliban is now rather easier to see but it is still far from being blindingly obvious.

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