Discovered by William Herschel in 1782
The Saturn Nebula, NGC 7009, is a very unusual planetary nebula containing many morphological and kinematic sub-systems such as jet-like streams and multiple shells. NGC 7009 derives its common name from its shape that resembles the planet Saturn with its rings seen edge on. The nebula is small with a diameter of 36 seconds of arc. It, however, has an extended halo that reaches to approximately 100 seconds of arc. The distance to the nebula is not known with any degree of accuracy[1}. The range of estimated distances is from 2,400 to 3,900 light years. The Sky Catalogue 2000.0 places its distance at 2,900 light years and SEDS places it at 2,400 light years.
The image above was assembled as a bi-color image using narrowband filters. Ha filtered data was mapped to Red and OIII data mapped to Green and Blue. Stars were overlaid with data from a separate RGB filtered image. This method produces a near true color image.