About this Object:
The Swan Nebula, also known as the Omega Nebula and the Horseshoe Nebula[2] (catalogued as Messier 17 or M17 and as NGC 6618) is an H II region in the constellation Sagittarius. It was discovered by Philippe Loys de Chéseaux in 1745. Charles Messier catalogued it in 1764. It is located in the rich starfields of the Sagittarius area of the Milky Way. The Omega Nebula is between 5,000 and 6,000 light-years from Earth and it spans some 15 light-years in diameter. The cloud of interstellar matter of which this nebula is a part is roughly 40 light-years in diameter. The total mass of the Omega Nebula is an estimated 800 solar masses. A open cluster of 35 stars lies embedded in the nebulosity and causes the gases of the nebula to shine due to radiation from these hot, young stars.

About this photo:
Location: Spring Hill Observatory Stow Massachusetts
Telescope: Astrotech RC8 @ F8
Mount: CGEM
Guiding: Orion StarShoot AutoGuider / OAG
Camera: ZWO 294MC Pro
Exposure: 21 x 180 sec (63 min.)
Acquisition: SharpCap v3.2 Darks, Flats
Processing: PixInsight v. 1.8
Post-processing: Adobe Photoshop
Date(s): June 17, 2020