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NGC 6891
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NGC 6891 (also PK 54-12.1) is a magnitude +10.5 planetary nebula located 7200 light years away in the constellation Delphinus.
The planetary nebula is a very young nebula and has a diameter of only 0.35 arcmin.
The central star HD 192563 is of magnitude +12.5 with a surface temperature is around 85,000 degrees K.

The planetary nebula was discovered by English astronomer Ralph Copeland using a 15-inch Grubb refractor at the Dun Echt observatory, Scotland (or from Arequipa?, Andes) on the 22nd September 1884.

Right ascension 20h 15m 08.8s, Declination +12 42' 16"

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