Collaborative Occultation Resources and Archive (CORA)

Occultations | Observations | Reports | Info + Credits | JOA | Admin | Login

Search within the "Journal for Occultation Astronomy" Index

JOA Volumes
2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024


Author or one keyword in title or abstract

Beyond Jupiter, The World of Distant Minor Planets: (136108) Haumea

JOA 2019, Vol. 9, No. 3, Page 22

Author(s): Mike Kretlow

Abstract: Haumea is one of the four currently known dwarf planets beyond Neptune. Haumea's mass was estimated to be about 1/3rd of Pluto's mass. Two moons were discovered so far. Due to the short rotation period (~ 4h) the dwarf planet is distorted into a triaxial Jacobi ellipsoid. A stellar occultationin 2017 revealed a ring, the first discovery for a TNO and the second discovery for an object not being a (giant) planet, after the discovery of a ring system around the Centaur (10199) Chariklo in 2013, also by a stellar occultation. From these 2017 occultation observations the physical dimensions (2322 x 1704 x 1026) km were modelled for a triaxial ellipsoid, placing Haumea among the largest trans-Neptunianobjects discovered so far (after Pluto and Eris).