The Size and Shape of the Oblong Dwarf Planet Haumea

  title={The Size and Shape of the Oblong Dwarf Planet Haumea},
  author={Alexandra C. Lockwood and Michael E. Brown and J. Stansberry},
  journal={Earth, Moon, and Planets},
Abstract We use thermal radiometry and visible photometry to constrain the size, shape, and albedo of the large Kuiper belt object Haumea. The correlation between the visible and thermal photometry demonstrates that Haumea’s high amplitude and quickly varying optical light curve is indeed due to Haumea’s extreme shape, rather than large scale albedo variations. However, the well-sampled high precision visible data we present does require longitudinal surface heterogeneity to account for the… 

The size, shape, density and ring of the dwarf planet Haumea from a stellar occultation

Observations from multiple Earth-based observatories of Haumea passing in front of a distant star (a multi-chord stellar occultation) report the presence of a ring with an opacity of 0.5, which constrains the three-dimensional orientation of Haumesa and its triaxial shape, which is inconsistent with a homogeneous body in hydrostatic equilibrium.

Haumea’s thermal emission revisited in the light of the occultation results

Orbits around the dwarf planet Haumea

  • P. Carvalho
  • Physics, Geology
    Journal of Physics: Conference Series
  • 2019
. The dwarf planet Haumea is a very interesting celestial body due to the characteristics of its physical form and also the recently observed ring. A Kuiper Belt object, Haumea is a triaxial

Haumea’s Shape, Composition, and Internal Structure

We have calculated the figure of equilibrium of a rapidly rotating, differentiated body to determine the shape, structure, and composition of the dwarf planet Haumea. Previous studies of Haumea’s

Trans-Neptunian objects and Centaurs at thermal wavelengths

TNOs are Cool: A Survey of the Transneptunian Region

Over one thousand objects have so far been discovered orbiting beyond Neptune. These trans-Neptunian objects (TNOs) represent the primitive remnants of the planetesimal disk from which the planets

The near-equilibrium figure of the dwarf planet Haumea and possible mechanism of origin of its satellites

The purpose of this paper consists in constructing the near-equilibrium model of the dwarf planet Haumea and developing the latent mechanism of accumulation of icy masses at sharp ends of the rapidly

Interpreting the densities of the Kuiper belt's dwarf planets

Kuiper Belt objects with absolute magnitude less than 3 (radius $\gtrsim$500 km), the dwarf planets, have a range of different ice/rock ratios, and are more rock-rich than their smaller counterparts.


Hi’iaka is the larger outer satellite of the dwarf planet Haumea. Using relative photometry from the Hubble Space Telescope and Magellan and a phase dispersion minimization analysis, we have



Photometric Observations Constraining the Size, Shape, and Albedo of 2003 EL61, a Rapidly Rotating, Pluto-sized Object in the Kuiper Belt

We present measurements at optical wavelengths of the spectral reflectance, rotational light curve, and solar phase curve of 2003 EL61. With apparent visual magnitude 17.5 at 51 AU from the Sun, this

Comprehensive Photometry of the Rings and 16 Satellites of Uranus with the Hubble Space Telescope

Abstract Photometric properties of 4 rings and 16 satellites of Uranus are presented, based on 41 Hubble Space Telescope images taken in 1997. Up to 25 filters per object covered the wavelength range


We present high-precision, time-resolved, visible and near-infrared photometry of the large (diameter ∼ 2500 km) Kuiper belt object (136108) 2003 EL61. The new data confirm rapid rotation at period P

"TNOs are cool": A survey of the trans-Neptunian region II. The thermal lightcurve of (136108) Haumea

Thermal emission from Kuiper Belt object (136108) Haumea was measured with Herschel-PACS at 100 and 160 micrometers for almost a full rotation period. Observations clearly indicate a 100-micrometer

Densities of Solar System Objects from Their Rotational Light Curves

We present models of the shapes of four Kuiper Belt objects (KBOs) and the Jovian Trojan asteroid (624) Hektor as ellipsoidal figures of equilibrium and Roche binaries. Our simulations select those

Time-Resolved Near-Infrared Photometry of Extreme Kuiper Belt Object Haumea

We present time-resolved near-infrared (J and H) photometry of the extreme Kuiper belt object (136108) Haumea (formerly 2003 EL61) taken to further investigate rotational variability of this object.


Using precise relative astrometry from the Hubble Space Telescope and the W. M. Keck Telescope, we have determined the orbits and masses of the two dynamically interacting satellites of the dwarf

High-contrast observations of (136108) Haumea. A crystalline water-ice multiple system

Context. The trans-Neptunian region of the Solar System is populated by a wide variety of icy bodies showing great diversity in orbital behavior, size, surface color, and composition. One can also

Voyager Disk-Integrated Photometry of Triton

Hapke's photometric model has been combined with a plane-parallel thin atmospheric haze model to describe Voyager whole-disk observations of Triton, in the violet, blue, and green wavelength bands, to obtain estimates ofTriton's geometricAlbedo, phase integral, and Bond albedo.

The Formation of the Collisional Family Around the Dwarf Planet Haumea

Haumea, a rapidly rotating elongated dwarf planet (∼1500 km in diameter), has two satellites and is associated with a “family” of several smaller Kuiper Belt objects (KBOs) in similar orbits. All