Object name: IC0289
IC 289 is a planetary nebula in Cassiopeia. I found it rather faint visually, even the central star is nearly impossible to see in my 10" scope. Though Dreyer described it as "pretty bright, pretty large, round, between two very faint stars. It does have one visual characteristic with M27. When you go from viewing it with no filter to using an OIII filter it rotates 90 degrees. I know of no other planetaries that do this. Thus it was high on my list to photograph to see why this happened. The main nebula, running from the northwest (upper right) to the southeast (lower left) has a lot of red in it. In fact, some photos show it as mostly red. Why some color photos show it as red and others blue with a hint of red like mine I don't know. Anyway running from the northeast to southwest is a very blue shell. This is likely what the OIII filter sees and the reason it rotates 90 degrees when viewed with the filter.