Lambda Orionis (between Betelgeuse and Bellatrix) is another fixed binary, with a 5.5 companion at PA 43º and 4.4" away.
[5981] lambda Orionis, also known as Meissa ("the shining one") and Heka ("a white spot"), is a binary star composed of a blue giant and a hot blue-white dwarf.
MEISSA (Lambda Orionis). One of the fainter stars to carry a proper name, Meissa is the Lambda star of Orion.
Meissa - Lambda Orionis - Orion's Head
Meissa is a blue spectral type O giant star and is part of the Collinder 69 star cluster. It has an apparent visible magnitude 3.39 and is one of the most luminous stars known.
Examples: Zeta Puppis, Lambda Orionis, Delta Orionis
Class B
Class B stars are extremely luminous and blue. Their spectra have neutral helium, which are most prominent at the B2 subclass, and moderate hydrogen lines.
Examples: Zeta Orionis, Zeta Puppis, Lambda Orionis, Delta Orionis
[edit] Class B
The Pleiades open star cluster with many bright B stars ...
 See also: Telescope, Magnitude, Sirius, Cluster, Rigel
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