M 108, the Surfboard Galaxy, and M 97, the Owl Nebula, in the Ursa Major constellation.
On the few clear evenings at the end of this unfortunate last winter, I photographed this strange pair with my little Seestar: the Surfboard Galaxy (M 108) and the Owl Planetary Nebula, in the constellation Ursa Major.
The two objects are located about two degrees east of the star Merak (β UMa), are completely different objects, and are only perspectively close:
The Surfboard Galaxy (M 108) is a galaxy located about 46 million light-years away and is part of the Ursa Major group of galaxies, a different group from the Milky Way's Local Group. It was discovered in 1781 by Pierre Méchain.
The Owl Planetary Nebula (M 97) is a much closer object, located within the Milky Way at a distance of "only" 2,030 light-years. It consists of gas expelled during the final stages of a giant star's life, and this star is currently evolving into a white dwarf with a mass approximately half that of our Sun, at magnitude +14, visible in the center when zoomed in. It was also discovered by Pierre Méchain in the same year.
With rather unreliable weather, clouds accumulating within minutes, and the risk of rain, using larger telescopes, with all the associated setup (the mount alone weighs more than 20 kilos), is impractical. Assembly and setup alone takes over an hour, and in case of rain, it's quite difficult to dismantle everything in a few minutes due to the complexity of the entire system: mount, telescope, guide scope, cables, computer, plus all the electrical connections—the real danger in case of rain. The Seestar is the ideal alternative in these cases, a small object weighing just 1.6 kg mounted on a photographic tripod. It literally takes 3 minutes to dismantle everything.
Scope: Seestar S30 in equatorial mode Aperture: 30 mm, focal length: 150 mm, f/5 Camera: ZWO ASI662 (embedded in Seestar S30) Exposure: 742 frames @ 30s (ZWO UV/IR cut filter, calibration frames performed automatically) Total integration time: 12h22m Software: N.I.N.A., PHD2, GraXpertAI, SetiAstro Cosmic Clarity, Siril (Veralux Hypermetric Stretch, Veralux Vectra) Bortle 7/8
















