NGC 6751, also known as the Glowing Eye Nebula, is a planetary nebula in the constellation Aquila. It is estimated to be about 6,500 light-years away.

NGC 6751, like all planetary nebulae was formed when a dying star threw off its outer layers of gas several thousand years ago. It is estimated to be around 0.8 light-years in diameter. NGC 6751 has a complex bipolar structure. There is a bright, inner bubble, as well as two fainter halos. (The outer halo, with a radius of 50″ is extremely faint and is broken, while the inner halo with a radius of 27″ is roughly spherical) On both the west and east sides of the inner shell, knots can be seen that are surrounded by faint lobes.

Additionally some nearby interstellar gas is excited by the extremely hot central star (140 000 K) faintly glowing in Ha and O-III color, similar to the situation at the Ghost of Jupiter Nebula.

Image data:
HaO3RGB (360-400-120-120-120 min) total 18,7 h, north is up, seeing 0.8-1.2 arc-sec,
80cm f/7 Astrooptik Keller cassegrain, FLI PL-16803, Astrodon gen2 filters, Prompt 7 CTIO Chile

Processing: Johannes Schedler

Find here a strongly cropped RGB image in 200% size showing the bright center nebula and below a long HaO3RGB exposure in 150/200% size.
Even below you see a less cropped deep image in 50/100% size.