description Witch Head Nebula (IC 2118) Overview
The Witch Head Nebula, cataloged as IC 2118, is a faint reflection nebula located in the constellation Eridanus, roughly 900 light-years from Earth. It is composed of interstellar dust grains that reflect the light of nearby sources, most notably the blue supergiant star Rigel in the neighboring constellation Orion. This reflected light gives the nebula its characteristic blue coloration, and its dusty filaments happen to resemble the profile of a witch's face. The nebula is primarily targeted by astrophotographers equipped with long-exposure imaging setups.
help Witch Head Nebula (IC 2118) FAQ
What is the Witch Head Nebula's catalog number?
The Witch Head Nebula is cataloged as IC 2118. It is a faint reflection nebula illuminated mainly by light from the blue supergiant star Rigel.
Where is the Witch Head Nebula located?
IC 2118 is associated with the constellation Eridanus and lies near the bright star Rigel. It is roughly 900 light-years from Earth.
Why does the Witch Head Nebula look blue?
It is made of dust that reflects and scatters Rigel's blue light. Dust scatters blue light more efficiently than red light, contributing to the nebula's blue appearance.
Can I see the Witch Head Nebula with the naked eye?
No, it is an extremely faint object and is not visible to the unaided eye. Its faint reflection glow is usually captured through long-exposure astrophotography or viewed with substantial optical equipment.
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