Constellation Sextans
The constellation Sextans, or ”The Sextant,” is a faint constellation located in the southern celestial hemisphere. It was introduced by the Polish astronomer Johannes Hevelius in the late 17th century and is named after the instrument used for measuring angles, particularly for celestial navigation.
Sextans is one of the 88 modern constellations recognized by the International Astronomical Union (IAU). It lies between the constellations Leo, Hydra, Crater, and Virgo. Due to its dimness, it can be challenging to spot Sextans with the naked eye from light-polluted areas, but it becomes more visible under the pristine night sky.
The main star in Sextans is Alpha Sextantis, also known as HD 88537. It is a yellow giant star with an apparent magnitude of around 4.49. Other notable stars in the constellation include Beta Sextantis, Gamma Sextantis, and Epsilon Sextantis.
Sextans does not have any prominent deep-sky objects within its boundaries. However, it does contain some notable galaxies, such as NGC 3115 (also known as the Spindle Galaxy), NGC 3166, and NGC 3169. These galaxies are visible through small to moderate-sized telescopes.
In ancient times, Sextans was not recognized as a separate constellation and was largely considered a part of Leo. Eventually, in the late 17th century, Hevelius identified and defined it as an individual constellation to honor scientific instruments. Sextans serves as a reminder of the significant role played by sextants in charting the night sky.
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