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Omicron 1 Orionis (ο 1 Ori) is a binary star [9] in the northeastern corner of the constellation Orion. It is visible to the naked eye with an apparent visual magnitude of 4.7. [4] Based upon an annual parallax shift of 5.01 ± 0.71 mas, it is located approximately 650 light years from the Sun.
The star C is the most massive of the four bright stars at the heart of the cluster. It is an O class blue main sequence star with a B-type main sequence companion. Its high luminosity and large distance (about 1,500 light years ) give it an apparent visible magnitude of 5.1.
• Notes = Common name(s) or alternate name(s); comments; notable properties [for example: multiple star status, range of variability if it is a variable star, exoplanets, etc.] See also [ edit ]
Pi 2 Orionis (π 2 Ori, π 2 Orionis) is the Bayer designation for a solitary star in the equatorial constellation of Orion. Although the Bright Star Catalogue lists this as a spectroscopic binary star system, [10] this does not appear to be the case. [11] It is visible to the naked eye with an apparent visual magnitude of 4.35. [2]
Pi 1 Orionis (π 1 Ori, π 1 Orionis) is a star in the equatorial constellation of Orion.It is faintly visible to the naked eye with an apparent visual magnitude of 4.74. [2] Based upon an annual parallax shift of 28.04 mas, [1] it is located about 116 light-years from the Sun.
S Orionis is an asymptotic giant branch star in the constellation Orion, approximately 480 parsecs (1,600 ly) away. It varies regularly in brightness between extremes of magnitude 7.2 and 14 every 14 months.
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Alnilam is the middle and brightest of the three stars of Orion's Belt. It is the 29th-brightest star in the sky (the fourth brightest in Orion) and is a blue supergiant. Together with Mintaka and Alnitak, the three stars make up Orion's Belt, known by many names across many ancient cultures. Alnilam is the middle star.