Abell 78

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.

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
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