Omega Nebula
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The Omega Nebula, also known as the Swan Nebula, Checkmark Nebula, Lobster Nebula, and the Horseshoe Nebula is an H II region in the constellation Sagittarius. It was discovered by Philippe Loys de Chéseaux in 1745. Charles Messier catalogued it... Wikipedia
Coordinates: RA 18h 20m 26s | Dec -16° 10′ 36″
Radius: 11 light years
Magnitude: 6
Age: 1.001 million years
Apparent dimensions (V): 11 arcmins
Apparent magnitude (V): 6.0
Constellation: Sagittarius