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NGC 2261 - Hubble's variable nebula
Foresthill, California
February 2005
FS-128G (ag, ST-4)
ST-10XME LLRGB 5 minutes each.

NGC 2261 is formed by the young binary star system R Monoceros.  The nebula is probably a bipolar parabolic shell of dust illuminated by the binary system.  Twisted double -helix type filaments in the Eastern edge of the nebula are most likely caused by twisted magnetic field above R Mon.