IC 4593 (2013)
Finally, I found a planetary nebula that also has some data for the faint halo surrounding it. A lot of planetary nebulas have these but images of them tend to only show the brightest parts while omitting the halo. (Note that’s not a covert criticism, to that particular image. I only linked to it as an example.)
Halo luminosity: hst_06347_20_wfpc2_f656n_wf_sci
North is up.
Hubble data is public domain. I do, however, request that you credit me for the processing of the image if you use it.
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