Two star systems with known exoplanets, HD 93083 and WASP-66, lie within Antlia, as do NGC 2997, a spiral galaxy, and the Antlia Dwarf Galaxy. ==History== The French astronomer Nicolas-Louis de Lacaille first described the constellation in French as la Machine Pneumatique (the Pneumatic Machine) in 1751–52, commemorating the air pump invented by the French physicist Denis Papin.


Lacaille Latinised the name to Antlia pneumatica on his 1763 chart.

This, due to its immense size, was split into hull, poop deck and sails by Lacaille in 1763.


English astronomer John Herschel proposed shrinking the name to one word in 1844, noting that Lacaille himself had abbreviated his constellations thus on occasion.


The International Astronomical Union adopted it as one of the 88 modern constellations in 1922. Although visible to the Ancient Greeks, Antlia's stars were too faint to have been commonly recognised as a figurative object, or part of one, in ancient asterisms.


The official constellation boundaries, as set by Belgian astronomer Eugène Delporte in 1930, are defined by a polygon with an east side, south side and ten other sides (facing the two other cardinal compass points) (illustrated in infobox at top-right).

Beta and Gamma Antliae (now HR 4339 and HD 90156) ended up in the neighbouring constellation Hydra once the constellation boundaries were delineated in 1930.


Discovered in 1997, the Antlia Dwarf is a 14.8m dwarf spheroidal galaxy that belongs to the Local Group of galaxies.


Two powerful flares lasting 4–5 minutes each were detected in 2002.


It has a planet that was discovered by the radial velocity method with the HARPS spectrograph in 2005.


A planet with 2.3 times the mass of Jupiter orbits it every 4 days, discovered by the transit method in 2012.


In 2018 the discovery was announced of a very low surface brightness galaxy near Epsilon Antliae, Antlia 2, which is a satellite galaxy of the Milky Way. The Antlia Cluster, also known as Abell S0636, is a cluster of galaxies located in the Hydra-Centaurus Supercluster.

All text is taken from Wikipedia. Text is available under the Creative Commons Attribution-ShareAlike License .

Page generated on 2021-08-05