Monoceros (, ) is a faint constellation on the winter night sky, surrounded by Orion to the west, Gemini to the north, Canis Major to the south and Hydra to the east. Other bordering constellations include Canis Minor, Lepus and Puppis.
Monoceros is an almost invisible constellation, with only a few fourth magnitude stars. Alpha Monocerotis has a visual magnitude of 3.93, slightly brighter than Gamma Monocerotis, which has a visual magnitude of 3.98.However, Monoceros does have some interesting features to observe with the aid of a small telescope. Beta Monocerotis is an impressive triple star system, the three stars form a triangle which seems to be fixed. The visual magnitudes of the stars are 4.7, 5.2 and 6.1. William Herschel discovered it in 1781 and commented it as 'one of the most beautiful sights in the heavens'.Epsilon Monocerotis is a fixed binary, with visual magnitudes of 4.5 and 6.5.S Monocerotis, or 15 Monocerotis, is a bluish white variable star and