Deep Sky Object of the Month

The planetary nebula NGC 7008 in Cygnus will show detail even in relatively small scopes. (Left) POSS/DSS photo, (right) drawing made in 1993 by Robert Kerwin using an eight-inch reflector.

One of the joys of deep sky observing is occasionally running across an object that is an unexpected treat. In 1993, I set out after NGC 7008, expecting to see only a smooth dim disk. Instead, I was delighted to find an object that showed interesting detail even in a modest eight-inch scope.

The disk is about 1.5 arc-minutes across. The nebula does not have the classic annular appearance; instead the brightest knots form a sort of horseshoe with a break to the southeast. The central star, at magnitude 13.2 (visual) should be within reach of six-inch or larger scopes. This nebula has a fairly high surface brightness, so higher magnifications can be used to bring out details. In my observing notes, I didn't mention trying filters, so I can't comment on that. Therefore, I have no other choice but to leave that as an exercise for the observer!

How to get there:

NGC 7008 can be a bit of a challenge to find since it lies in an area devoid of bright stars. Look for it approximately ten degrees north of Deneb.

Finder chart for NGC 7008