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Blue Snowball Nebula

Snowball Nebula, C22, NGC 7662, PK 106-17.1

Proper NameBlue Snowball Nebula
Caldwell NumberC22
NGC/IC NumberNGC 7662
Other DesignationsPK 106-17.1
ConstellationAndromeda
Right Ascension23h 25m 54s
Declination+42° 32' 6"
Distancec.5,600 light years
c.1,700 parsecs
MagnitudeApparent: +8.3
Absolute: -1.9
DiameterApparent: 0.5'
Actual: 0.6 light years
Optimum VisibilitySeptember / October
NotesThis planetary nebula has a slightly elongated shape, and is composed of two distinct concentric rings of matter expanding outward from the central star.

A planetary nebula in the west of Andromeda, nearly 4,000 light years from the Solar System. Though it is faint as seen from Earth (its apparent magnitude is +8.3), the Blue Snowball is in fact a vast cloud of expanding gas nearly a light year across.

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