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

  title={The size, shape, density and ring of the dwarf planet Haumea from a stellar occultation},
  author={Jos{\'e} Luis Ortiz and Pablo Santos-Sanz and Bruno Sicardy and Gustavo Benedetti-Rossi and Diane B{\'e}rard and Nicol{\'a}s Morales and Ren{\'e} Duffard and Felipe Braga-Ribas and Ulrich Hopp and Christoph Ries and Valerio Nascimbeni and Francesco Marzari and V Granata and Andr{\'a}s P{\'a}l and Cs. Kiss and T Pribulla and R. Kom{\vz}{\'i}k and Kamil Hornoch and P. Pravec and Paolo Bacci and Martina Maestripieri and L. Nerli and L. Mazzei and Mauro Bachini and Fabio Martinelli and Giacomo Succi and Fabrizio Ciabattari and Herman Miku{\vz} and Albino Carbognani and Bernd G{\"a}hrken and Stefano Mottola and Stephan Hellmich and Flavia Luane Rommel and Estela Fern{\'a}ndez-Valenzuela and Adriano Campo Bagat{\'i}n and Stefan Cikota and Aleksandar Cikota and J. J. Lecacheux and R. Vieira-Martins and J. I. B. Camargo and M. Assafin and Florent Colas and Raoul Behrend and Josselin Desmars and Erick Meza and Alvaro Alvarez-Candal and Wolfgang Beisker and Altair R. Gomes-J{\'u}nior and B. E. Morgado and F. Roques and F. Vachier and J. Berthier and Thomas G. Mueller and Jos{\'e} Mar{\'i}a Madiedo and Ozan Unsalan and Eda Sonbas and N. Karaman and Orhan Erece and Derya Koseoğlu and Tuncay Ozisik and Sevgi Kalkan and Y. Guney and M Shakhs Niaei and Onur Satir and Cahit Yeşilyaprak and C. Puskullu and A. Kabas and Osman Mirza Demircan and J. Alikakos and V. Charmandaris and Giuseppe Leto and J. M. Ohlert and Jean Marc Christille and R{\'o}bert Szak{\'a}ts and A. tak{\'a}csn{\'e} Farkas and Erika Varga-Vereb{\'e}lyi and G{\'a}bor Marton and A. Marciniak and Przemysław Bartczak and T Santana-Ros and M. Butkiewicz-Ba̧k and Grzegorz Dudziński and V{\'i}ctor Al{\'i}-Lagoa and K. Gazeas and L. Tzouganatos and N. Paschalis and Vasileios Tsamis and Agust{\'i}n S{\'a}nchez-Lavega and Santiago P{\'e}rez-Hoyos and Ricardo Hueso and Jose Carlos Guirado and V. Peris and Ram{\'o}n Iglesias-Marzoa},
Haumea—one of the four known trans-Neptunian dwarf planets—is a very elongated and rapidly rotating body. In contrast to other dwarf planets, its size, shape, albedo and density are not well constrained. The Centaur Chariklo was the first body other than a giant planet known to have a ring system, and the Centaur Chiron was later found to possess something similar to Chariklo’s rings. Here we report observations from multiple Earth-based observatories of Haumea passing in front of a distant… Expand
The dynamics of rings around Centaurs and Trans-Neptunian objects
Since 2013, dense and narrow rings are known around the small Centaur object Chariklo and the dwarf planet Haumea. Dense material has also been detected around the Centaur Chiron, although its natureExpand
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Dense and narrow rings have been discovered recently around the small Centaur object Chariklo1 and the dwarf planet Haumea2, while being suspected around the Centaur Chiron3, although this point isExpand
Haumea’s thermal emission revisited in the light of the occultation results
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Rings have recently been discovered around the trans-Neptunian object (TNO) 136108 Haumea and the Centaur 10199 Chariklo. Rings are also suspected around the Centaur 2060 Chiron. As planetary closeExpand
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The dwarf planet Haumea is a trans-Neptunian object that is orbited by two moons and has a recently discovered ring. The particles of this ring are near the 3:1 resonance between the spin of HaumeaExpand
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Modeling the Formation of the Family of the Dwarf Planet Haumea
The dwarf planet (136108) Haumea has an intriguing combination of unique physical properties: near-breakup spin, two regular satellites, and an unexpectedly compact family. While these propertiesExpand


A ring system detected around the Centaur (10199) Chariklo
Observations of a multichord stellar occultation revealed the presence of a ring system around (10199) Chariklo, which is a Centaur—that is, one of a class of small objects orbiting primarily between Jupiter and Neptune—with an equivalent radius of 124  9 kilometres. Expand
On the mass and origin of Chariklo's rings
Observations in 2013 and 2014 of the Centaur 10199 Chariklo and its ring system consistently indicated that the radial width of the inner, more massive ring varies with longitude. That stronglyExpand
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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 dwarfExpand
Centaurs are minor planets orbiting between Jupiter and Neptune that have or had crossing orbits with one or more giant planets. Recent observations and reinterpretation of previous observations haveExpand
The Size and Shape of the Oblong Dwarf Planet Haumea
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A Pluto-like radius and a high albedo for the dwarf planet Eris from an occultation
The observation of a multi-chord stellar occultation by Eris on 6 November 2010 is reported, consistent with a spherical shape for Eris, and it is anticipated that this atmosphere may periodically sublimate as Eris approaches its perihelion, at 37.8 astronomical units from the Sun. Expand
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The disappearances and reappearances of the star were abrupt, showing that Makemake has no global Pluto-like atmosphere at an upper limit of 4–12 nanobar (1σ) for the surface pressure, although a localized atmosphere is possible. Expand
The Short Rotation Period of Hi'iaka, Haumea's Largest Satellite
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 haveExpand
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From time series CCD observations of a fixed and large star field that contained the binary trans-Neptunian object (90482) Orcus (formerly 2004 DW), taken during a period of 33 days, we have beenExpand
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