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Abell 78

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Abell 78
Emission nebula
Planetary nebula
As Seen From Mount Lemmon Sky Center
Observation data: J2000.0 epoch
Right ascension21h 35m 29.38s
Declination+31° 41′ 45.3″
ConstellationCygnus
Physical characteristics
Radius1.4 ly ly
DesignationsPK 081-14.1, PN G 081.2-14.9, Abel 64, ARO 174, 2MASS J21352938+3141453, CSI+31-21334, UBV 18570, UBV M 44681
See also: Lists of nebulae

Abell 78 is a planetary nebula located in the constellation of Cygnus. It has a fainter halo consisting mostly hydrogen, and an inner elliptical ring that is mostly made of helium.