Robert Jonckheere was searching for double stars. Some of them turned out to be planetary nebulas, like <a href="https://www.flickr.com/photos/geckzilla/10404953263/">J 900</a>. They are both in his double-star catalog so I wondered if he ever realized his mistake. I looked it up and he did go back to them later with a larger instrument and discovered they were <a href="http://adsabs.harvard.edu/abs/1916Obs....39..134J" rel="nofollow">actually nebulas</a>.

As usual, data is absent from the corners so I could maintain the north-up orientation of the object. The color is subjectively added.

All channels: hst_06347_13_wfpc2_f656n_pc_sci