Horologium

Horologium (Hor, pendulum clock) is a small and faint constellation in the southern sky (declination around −60 degrees). Horologium is also home to many deep-sky objects.

Horologium was plotted in the 18th century by Abbé Nicolas Louis de Lacaille. He originally labeled it Horologium Oscillitorium, the Latin name for a pendulum clock, to honour its inventor Christiaan Huygens and his book Horologium Oscillatorium.

Bordering constellations
Eridanus | Hydrus | Reticulum | Dorado | Caelum
Wikipedia