The Dwarf Planet Haumea

The Dwarf Planet Haumea

Discovery and Naming:

Size, Mass and Orbit:

Calculating Haumeau's size, mass and density is somewhat complicated. Whereas it is large enough and bright enough for its albedo (and thus its size) to be measured, the calculations of its dimensions are made difficult by its rapid rotation. However, several ellipsoid-model calculations have been conducted using the Keck telescopes, the Spitzer Space Telescope, and the Herschel Space Telescope that have provided estimates.

This makes Haumea one of the largest trans-Neptunian objects discovered, smaller than Eris, Pluto, probably Makemake, and possibly 2007 OR10, but larger than Sedna, Quaoar, and Orcus. Combined with estimates of its density, Haumea is massive enough to have achieved hydrostatic equilibrium. Although Haumea appears to be far from spherical, its ellipsoidal shape is thought to result from its rapid rotation.

Composition:

Classification:

Moons:

Haumea has two known moons, which are named after the daughters of the Hawaiian goddess - Hi'iaka and Namaka. Both were discovered in 2005 by Brown's team while conducting observations of Haumea at the W.M. Keck Observatory. Hi'iaka, which was initially nicknamed "Rudolph" by the Caltech team, was discovered January 26th, 2005.

Exploration:

  • Wikipedia - Haumea

  • The Planets - Haumea

  • Caltech - Haumea

  • NASA - Solar System Exploration - Haumea

  • Matthew Williams

    Matthew Williams

    Matt Williams is a space journalist, science communicator, and author with several published titles and studies. His work is featured in The Ross 248 Project and Interstellar Travel edited by NASA alumni Les Johnson and Ken Roy. He also hosts the podcast series Stories from Space at ITSP Magazine. He lives in beautiful British Columbia with his wife and family. For more information, check out his website.