Constellation List
Star List
By Season
Alphabetical
Latitudes
Minneapolis, MN (45°N)
NorthPole (90°N)
Prudhoe Bay, AK (70°N)
St.Petersburg,
Russia(60°N)
Prague, C.R. (50°N)
Philadelphia, PA (40°N)
Albuquerque, NM (35°N)
New Orleans, LA (30°N)
Santiago, Cuba (20°N)
Caracas,
Venezuela (10°N)
Quito, Ecuador (0°N)
Port Moresby,
New Guinea(10°S)
Porto Alegre,
Brazil (30°S)
Montevideo,
Uruguay(35°S)
Queenstown, NZ (45°S)
South Pole (90°S)
Bibliography and Credits
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Alnitak A
Zeta1 Orionis
Names For This Star
Another name for this star is Alnitah. The name of the star derives from the Arabic Al Nitak meaning "The Belt" or "The Girdle".
Description of the Star
Alnitak is a double star system. Alnitak A is a blue O9.7Ib supergiant star about 15 times the diameter of the sun, at least 11,000 times more luminous than the sun.
The companion is yellow in color. There is a third component, Alnitak C, almost one minute of arc away from A. This latter star, according to Burnham is probably not physically related to the A and B stars.
Other Designations For This Star
Flamsteed |
50 Orionis |
Hipparcos Identifier (HIP Number) |
26727 |
Harvard Revised (HR Number) |
1948 |
Henry Draper Catalog (HD Number) |
37742 |
Bonner Durchmusterung (BD Number) |
BD-02 1338 |
Smithsonian Astrophysical
Observatory compendium (SAO Number) |
132444 |
Fundamental Katalog (FK5 Number) |
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