The Red Rectangle Nebula, so called because of its red color and unique rectangular shape, is a protoplanetary nebula in the Monoceros constellation. Also known as HD 44179, the nebula was discovered in 1973 during a rocket flight associated with the AFCRL Infrared Sky Survey called Hi Star.

Distance to Earth: 2,316 light years

Magnitude: 9.02

Coordinates: RA 6h 19m 58s | Dec -10° 38′ 15″

Constellation: Monoceros

Apparent magnitude (V): 9.02