description IC 289 Overview
IC 289 is a faint planetary nebula in the constellation Cassiopeia. It has a broadly circular shell and low surface brightness, so it is more difficult to observe and photograph than brighter planetary nebulae. The object is useful for observers studying the extended gas expelled by an aging star and for comparing the appearance of planetary nebulae at different stages of expansion.
help IC 289 FAQ
Where is IC 289 located?
IC 289 is a faint planetary nebula in the constellation Cassiopeia. It appears as a broadly circular shell of glowing gas around an evolved star.
Why is IC 289 difficult to observe?
IC 289 has low surface brightness, so it is less obvious than brighter planetary nebulae. Observers often need a dark sky, suitable optics, and careful imaging to record its extended shell.
What type of object is IC 289?
It is a planetary nebula, the expanding gas left after a low- or intermediate-mass star sheds its outer layers. The central star illuminates that expelled material.
Can IC 289 be photographed by amateur astronomers?
Yes, but its faintness makes it a demanding target. Long-exposure astrophotography and narrowband filters can help reveal the circular gas shell against the background sky.
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