Fr.: Machine pneumatique
The Air Pump. A faint constellation in the southern hemisphere, at about alpha 10h, delta -35 deg. Abbreviation: Ant; genitive form: Antliae.
L. antlia "pump," from Gk. antlia "ship's hold, bilge water," from antlos.
Tolombé "pump," from Turkish tulumba "pump," from It. tromba.
Fr.: U Antliae
A → carbon star of the → asymptotic giant branch type located in the constellation of → Antlia. Its other designations are HIP 51821 (→ Hipparcos Star Catalogue), HD 91793, and HR 4153. U Antliae is an → irregular variable that changes its → visual magnitude between 5.27 and 6.04. About 850 → light-years from Earth, it shines with a → luminosity approximately 8,000 times that of the → solar luminosity and has a → surface temperature 2,800 K. It is surrounded by a complex structure of dust shells. Around 2,700 years ago, U Antliae went through a short period of rapid → mass loss. During this period of only a few hundred years, the material making up the shell seen in the → Atacama Large Millimeter Array (ALMA) data was ejected at high speed (Kerschbaum et al., 2017, A&A 605, A116, arXiv:1708.02915).