|The ring galaxy PGC 54559 (Hoag's object) in the constellation Serpens on May 25 / 26, 2020. The
non-typical galaxy is named after the American astronomer Arthur Hoag (1921-1999) who discovered it in 1950 and identified it as either a planetary nebula
or a peculiar galaxy. A ring of young hot blue stars with an apparent outer diameter of 45" (121,000 light-years) circles the older yellow nucleus with an
apparent outer diameter of 6" (17,000 light-years) of this ring galaxy. Hoag's object is approximately 600 million light-years from Earth (source: Wikipedia).
Fourty-eight 3 minute exposures at ISO 800 were added for this shot with the DeepSkyStacker software (resulting in a 2 hour 26 minute exposure)
and the final image processing was done 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).