LL Pegasi is a Mira variable star surrounded by a pinwheel-shaped nebula, IRAS 23166+1655, thought to be a preplanetary nebula. It is 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.

Magnitude: 10.379

Constellation: Pegasus

Distance: 1,300 pc

Radius: 608-869 R_☉