IRAS 23166+1655  From Wikipedia, the free encyclopedia Jump to:
navigation, search IRAS 23166+1655 reflection nebula
protoplanetary nebula Pre-planetary nebula, IRAS 23166+1655.jpg
Hubble Space Telescope image of IRAS 23166+1655, taken in the
near-infrared. The bright object to the right is a star much
closer to Earth. It was used as a guide star for adaptive optics
corrections that allowed the Keck II telescope to resolve the LL
Pegasi binary pair.[1] Observation data: epoch Right ascension
23h 19m 12s Declination +17° 11′ 35″ See also: Lists of nebulae
IRAS 23166+1655 is thought to be a preplanetary nebula
surrounding LL Pegasi (AFGL 3068), a binary system that includes
an extreme carbon star. The pair is hidden by the dust cloud
ejected from the carbon star and is only visible in infrared
light.[1]  The nebula displays an unusual spiral shape. The
shape is thought to be formed through the interaction between
the stellar companion and the carbon star, as has been seen in
other binary systems, although not