M 1-46, also known as Hen 2-401 or, in the HLA as PK016-01D1, is an interesting, detailed little nebula. There are only two observations available and they both use very similar narrowband filters, F658N and F656N. Those two can be drastically different sometimes but this time they were nearly the same. The 656N data just looked a little bit hazier. The dimpled pattern is present throughout the nebula on both channels of data.

Red: hst_08345_09_wfpc2_f658n_pc_sci Green: Pseudo Blue: hst_08345_09_wfpc2_f656n_pc_sci