Reflection Nebula IC2118 - Witch Head Nebula - AR 05h 04m 29s DEC -07° 30' 19"
Date/Place2017-11-11 at Elijah Observatory
ScopeTakahashi FSQ85ED
IntegrationImaged with the focal reducer.
LRGBH composition
L:48x600 sec.
RGB: 16x600 sec. for each channel
H-alpha: 16x1200 sec.
CommentIt is an extremely faint reflection nebula believed to be an ancient supernova remnant or gas cloud illuminated by nearby supergiant star Rigel in Orion. It lies in the Eridanus constellation, about 900 ly from Earth. Radio observations show substantial carbon monoxide emission throughout parts of IC 2118, an indicator of the presence of molecular clouds and star formation in the nebula. The molecular clouds of IC 2118 are probably juxtaposed to the outer boundaries of the vast Orion-Eridanus bubble, a giant supershell of molecular hydrogen blown by the high mass stars of the Orion OB1 association. As the supershell expands into the interstellar medium, favorable circumstances for star formation occur. IC 2118 is located in one such area.(Text adapted from Wikipedia)