Facts about Haumea's discovery narrative
- 08
Adaptive optics imaging from ground-based telescopes in 2005 first resolved Haumea's extreme oblateness, showing the dwarf planet was roughly twice as wide at its equator as at its poles due to its rapid rotation.
- 07
During 2010 occultation observations, astronomers measured Haumea's rotation period at 3.9 hours, making it one of the fastest-spinning objects in the solar system's outer regions.
- 06
Thermal infrared observations from 2005 detected a satellite collision around Haumea, producing the debris that formed its tenuous ring system, making it the only known ringed dwarf planet.
- 05
Spectroscopic analysis revealed that Haumea's surface composition includes crystalline water ice mixed with methane and ammonia ices, suggesting a complex thermal history within the Kuiper Belt.
- 04
Haumea's discovery in 2004 revealed the dwarf planet's three moons, later named Hi'iaka, Namaka, and a third smaller satellite, making it the first known multi-moon Kuiper Belt object.
- 03
The name Haumea was officially adopted by the International Astronomical Union in 2008, three years after the competing discovery claims, honoring the Hawaiian goddess of childbirth and fertility.
- 02
Haumea's elongated shape was confirmed through occultation observations in 2010 when the dwarf planet passed in front of a star, revealing its unusual 2,322 by 1,113 kilometer dimensions.
- 01
In 2004, two independent teams discovered the dwarf planet simultaneously, with Mike Brown's Caltech group and a Spanish team led by José Luis Ortiz both claiming priority for Haumea.