NGC 1931 is a reflection and emission nebula and around a young star cluster in the constellation Auriga.

[4] It is believed that the main ionizing source for the dusty molecular cloud is a single, hot B-type star.

[3] The distance from Earth is estimated at 7500 light years.

[4] The German-born English astronomer William Herschel discovered the small reflection nebula in 1793 and noted seeing a few stars in the middle.

[6] American astronomer Stewart Sharpless cataloged the emission component, which lies outside the center, as Sh 2-237 in 1959.