|The planetary nebula NGC 40 (also known as Bow-Tie Nebula or Caldwell 2) in the constellation
Cepheus on September 18 / 19, 2020. NGC 40 is composed of hot gas around a dying star. The central star has a surface temperature of about 50,000 degrees
Celsius and is approximately the size of the Earth. NGC 40 is roughly 3,000 light-years from Earth and was discovered by William Herschel in 1788 (source: Wikipedia).
Twenty-two 3 minute exposures at ISO 800 were added for this shot with the DeepSkyStacker software (resulting in a 1 hour 5 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).