How to find the Blue Snowball Nebula, Caldwell 22

How to Find the Blue Snowball Nebula, Caldwell 22

c22 hubble NASA ESA.jpg

Caldwell 22 or NGC 7662 is a planetary nebula located somewhere between 1,800 light years and 5,600 light years away. A magnification of about 100x can show a blue disk in a 6 inch telescope. This is a good target and a favourite among backyard astronomers.

Image credit: Howard Bond (ST ScI) and NASA/ESA

Other Names:

Caldwell 22

NGC 7662

Blue Snowball Nebula

Snowball Nebula

Telescope Image to Scale:


This image is 30 arc minutes by 30 arcminutes which is about the size of the full moon.


Magnitude = 8.6

Surface brightness = 5.6

Telescope Aperture City Suburbs Rural Dark Sky
4 inches 9 10 11 12.5
5 inches 9.5 10.5 11.5 13
6 inches 10 11 12 13.5
8 inches 10.5 11.5 12.5 14
10 inches 11 12 13 14.5

Use this chart to estimate if you can see the object from your location with your telescope. For more help on using this chart click here.

How to See It:

The Snowball nebula is officially located in the constellation Andromeda.  It can be found in the crosshairs on image below. It will appear as a star with nebulosity in a small telescope and a bluish disk can be seen at 100x magnification in a 6 inch telescope. It's co-ordinates are: RA 23h 26m 34.58 DEC +42° 36′ 44.1″ if you are using guiding software.

How to find Caldwell 22, the Blue Snowball Nebula

To find more space objects have a look at the constellation guide by clicking the link or go back to the list of deep space objects.

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