Visually, NGC 6891 seems fairly simple. I can only see some very small knots of H-alpha. One of them is easy to spot. It’s a very small, red dot near the left edge of the outer halo of material. I almost cleaned it up, thinking it was a cosmic ray.
Red: hst_08390_09_wfpc2_f658n_pc_sci
Green: hst_08390_09_wfpc2_f555w_pc_sci
Blue: hst_08390_09_wfpc2_f502n_pc_sci
North is NOT up.
Copyright information:
Hubble data is public domain, but I put a lot of work into combining it into beautiful color images. The minimal credit line should read: NASA / ESA / J. Schmidt
This work is licensed under a Creative Commons Attribution 3.0 Unported License.