|Object name:||Constellation:||Coordinates:||Apparent size:||Visual brightness:|
|NGC 7048||Cygnus||24h14m / +46°17'||1.02' x 1.02'||12.1 mag|
The planetary nebula NGC 7048 (PK 88-1.1) in the constellation Cygnus. NGC 7048 is a glowing gaseous shell thrown off by a star during the final stage of its evolution. From its rather low surface brightness, it is thought to be one of the more evolved planetary nebulaes - with an estimated age of 67,000 to 81,000 years. NGC 7048 is roughly 5,900 light-years from Earth and was discovered by French astronomer Édouard Stephan in 1878 (source: Wikipedia / Xuan Fang et al 2018, Astrophysical Journal, Volume 859 Number 2).
Twenty-four 3-minute exposures (72 minutes total exposure) at gain 100 taken on August 9 / 10, 2021, were added for this shot with the Astro Pixel Processor (APP) software and the final image processing was done in Photoshop. Darks, flats and darkflats were used.
Equipment: Cooled ASI 2600MC Pro 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.