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NGC 7662 Planetary Nebula

NGC 7662 is a bright planetary nebula in Andromeda, one of the easiest objects of its type to see with small amateur telescopes.
UPDATED JUN 26, 2024
NGC 7662 planetary nebula by Mike Landherr NASA
NGC 7662 planetary nebula by Mike Landherr NASA

NGC 7662 is a bright planetary nebula in Andromeda, one of the easiest objects of its type to see with small amateur telescopes. To find it, center your telescope on the 6th-magnitude star 13 Andromedae and you will have the nebula in the eyepiece’s field, half a degree southwest of the star.

A 2.4-inch scope shows NGC 7662 as a nearly stellar object of magnitude 8.5. With a 6-inch telescope and magnification of at least 100x, the nebula appears as a fuzzy blue disk with an elliptical outline.

Larger 10 and 12-inch telescopes reveal the darker central region, but the 13th-magnitude central star remains invisible.

The blue color of NGC 7662 is common in most planetary nebulae. Ultraviolet light coming from the hot central star excites the nebula’s gas, and the strong emission by oxygen in the gas produces the bluish hue.

Maybe you are wondering why the nebula doesn’t appear blue in this picture to the right. This is because the picture’s colors are not real, they were chosen to highlight the emission of certain ions in the nebula.

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