Iota Orionis is a spectroscopic binary system , with a variable magnitude of O9III .
Iota Orionis is one of the brightest in the collection , located in the bottom of the Orion nebula .
one   is a spectroscopic one   , with a variable magnitude of O9III .
Iota Orionis is one of the brightest in the collection , located in the bottom of the Orion nebula .