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Alnitak Aa compared to the Sun (to scale) Alnitak is a triple star system at the eastern end of Orion's Belt, the second-magnitude primary having a 4th-magnitude companion nearly 3 arcseconds distant, in an orbit taking over 1,500 years. The part called Alnitak A is itself a close binary, comprising the stars Alnitak Aa and Alnitak Ab.
Orion's Belt is an asterism in the constellation of Orion.Other names include the Belt of Orion, the Three Kings, and the Three Sisters. [1] The belt consists of three bright and easily identifiable collinear star systems – Alnitak, Alnilam, and Mintaka – nearly equally spaced in a line, spanning an angular size of ~ 140′ (2.3°).
Orion's Belt or The Belt of Orion is an asterism within the constellation. It consists of the three bright stars Zeta (Alnitak), Epsilon (Alnilam), and Delta (Mintaka). Alnitak is around 800 light years away from earth and is 100,000 times more luminous than the Sun and shines with magnitude 1.8; much of its radiation is in the ultraviolet ...
At 65 degrees long and 40 degrees wide, the Winter Football covers almost half of the southern sky.
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.
Orion's Belt superimposed on the Giza pyramid complex, illustrating the Orion Correlation Theory. From left to right: Alnitak on the Great Pyramid of Giza; Alnilam on the pyramid of Khafre; Mintaka on the pyramid of Menkaure; The Orion correlation theory is a fringe theory in Egyptology attempting to explain the arrangement of the Giza pyramid ...
Orion variable; well-studied protostar 2MASS J05352184-0546085: V2384: 05 h 35 m 21.84 s: −05° 46′ 08.6″ M7: eclipsing binary brown dwarf OMC-2 FIR 4: V2457: 05 h 35 m 26.97 s: −05° 09′ 54.5″ M7: has a circumstellar disk; Orion variable Orion Source I: 05 h 35 m 14.51 s: −05° 22′ 30.4″ protostellar binary Reipurth 50: 05 h ...
Orion OB1b - the three bright stars ζ Ori (Alnitak), ε Ori (Alnilam), and δ Ori (Mintaka) which make up the asterism known as "Orion's Belt", and minor stars. This group has an average age of approximately 8 million years and is further subdivided into three subgroups.