IC 2118 (also known as NGC 1909, VdB 36, DG 52, Ced 41, Hubble I 9, LBN 959, LBN 207.50-27.78, Magakian 93, or Witch Head Nebula due to its shape) is an extremely faint reflection nebula in constellation Eridanus, near to the border with Orion. It is believed to be an ancient supernova remnant illuminated by nearby supergiant Rigel. The distance from Earth is about 900 light-years. The dust particles, reflecting blue light better than red, are giving the cloud its blue color. The carbon monoxide emission of IC 2118 is an indicator of the presence of molecular clouds and star formation. A more detailed image of the Witch Head nebula can be seen here.