Object: Constellation: Coordinates: Size: Brightness:
NGC 7008 Cygnus 21h01m / +5433' 1.4' x 1.1' 12.0mag

The planetary nebula NGC 7008 (also known as "Fetus" nebula" or PK 93+5.2) in the constellation Cygnus on October 14 / 15, 2017. The expanding ionized shell of gas ejected by an old red giant star late in its life was discovered by William Herschel in 1787 and is approximately 2800 light-years from earth. It measures 1 light-year in diameter (source: Wikipedia).

Twenty-one exposures of approximately 3 minutes at ISO 800 were stacked with no dark frame subtraction with Deep Sky Stacker (resulting in a 1 h 10 min exposure) and further processed in Photoshop.
Equipment: Canon EOS 450D Baader modified camera, TeleVue Paracorr Type II coma corrector, 16" f/4.5 "Ninja" dobsonian telescope riding on a dual-axis Tom Osypowski equatorial platform, Lacerta MGEN autoguider, Lacerta off axis system (field of view comparison: image of the moon with the same equipment).

Search chart for NGC 7008. Map © 2017 "The Mag-7 Star Atlas Project", www.siaris.net. Map is modified. The map can be downloaded here .