(Wolf-Rayet star surrounded by spiral nebula)
WR 104 is a Wolf-Rayet star that is part of a triple star
that includes a B-type star and a distant companion.
It is of interest as an example of a pin-wheel nebula,
a cloud that twirls around the star in sync with the
orbit of its close companion.
Characteristics of the system:
WR 104 specific characteristics:
The close companion has spectral type B0.5V.
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