SUNSET: 
0
Photographer:
massimo.difusco
Location of Photo:
Ferrara (Italy)
Date/Time of photo:
23/11/2023 00:00
Equipment:
Konus 200/1000 @950mm (f/4.8), Player One Poseidon-C @-5 °C camera, Sky-Watcher Eq6r Pro mount, SvBony UV/IR-cut and CLS filters
Description:
NGC 2419 (also known as Caldwell 25) is a globular cluster in the constellation Lynx. It was discovered by William Herschel on December 31, 1788. NGC 2419 is at a distance of about 300000 light years from the Solar System and at the same distance from the Galactic Center. NGC 2419 bears the nickname "the Intergalactic Wanderer", which was bestowed when it was erroneously thought not to be in orbit around the Milky Way. Its orbit takes it further away from the galactic center than the Magellanic Clouds, but it can (with qualifications) be considered as part of the Milky Way. At this great distance it takes three billion years to make one trip around the galaxy. The cluster is dim in comparison to more famous globular clusters such as M13. Nonetheless, NGC 2419 is a 9th magnitude object and is readily viewed, in good sky conditions, with good quality telescopes as small as 102mm in aperture. Intrinsically it is one of the brightest and most massive globular clusters of our galaxy, having an absolute magnitude of −9.42 and being 900000 times more massive than the Sun. It was proposed that NGC 2419 could be, as Omega Centauri, the remnant of a dwarf spheroidal galaxy disrupted and accreted by the Milky Way. However, that hypothesis has been disputed. Astronomer Leos Ondra has noted that NGC 2419 would be the "best and brightest" for any observers in the Andromeda Galaxy, looking for globular clusters in our galaxy since it lies outside the obscuring density of the main disk. This is analogous to the way the cluster G1 can be seen orbiting outside of the Andromeda Galaxy from Earth. I also see an asterism in this image, that is, a rose (the globular cluster) with its stem of thorns (the stars with the spikes). So, I had fun nicknaming this picture "The Thorny Rose".
