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Our knowledge of main-belt comets (MBCs), which exhibit comet-like activity likely due to the sublimation of volatile ices, yet orbit in the main asteroid belt, has increased greatly since the discovery of the first known MBC,…

Earth and Planetary Astrophysics · Physics 2016-03-16 Henry H. Hsieh

Main Belt Comets (MBCs) exhibit sublimation-driven activity while occupying asteroid-like orbits in the Main Asteroid Belt. MBCs and candidates show stronger clustering of their longitudes of perihelion around 15{\deg} than other objects…

The study of active asteroids has attracted a great deal of interest in recent years since the recognition of main-belt comets (which orbit in the main asteroid belt, but exhibit comet-like activity due to the sublimation of volatile ices)…

Earth and Planetary Astrophysics · Physics 2015-11-09 Henry H. Hsieh

We examine the orbital element distribution of main-belt comets (MBCs), which are objects that exhibit cometary activity yet orbit in the main asteroid belt, and may be potentially useful as tracers of ice in the inner solar system. We find…

Earth and Planetary Astrophysics · Physics 2018-03-21 Yoonyoung Kim , Youngmin JeongAhn , Henry H. Hsieh

The discovery of Main Belt Comets (MBCs) has raised many questions regarding the origin and activation mechanism of these objects. Results of a study of the dynamics of these bodies suggest that MBCs were formed in-situ as the remnants of…

Earth and Planetary Astrophysics · Physics 2015-05-14 Nader Haghighipour

The seven known main belt comets (MBCs) have orbital characteristics of main belt asteroids yet exhibit dust ejection like comets. In order to constrain their physical and orbital properties we searched the Thousand Asteroid Light Curve…

Earth and Planetary Astrophysics · Physics 2011-08-17 S. Sonnett , J. Kleyna , R. Jedicke , J. Masiero

We present the discovery of activity emanating from main-belt asteroid 2015 FW412, a finding stemming from the Citizen Science project Active Asteroids, a NASA Partner program. We identified a pronounced tail originating from 2015 FW412 and…

Cometary activity in main-belt asteroids probes the ice content of these objects and provides clues to the history of volatiles in the inner solar system. We search the Palomar Transient Factory (PTF) survey to derive upper limits on the…

Main-belt asteroid 2010 LH$_{15}$ has been classified as an active asteroid, based on the recent discovery of dust activity from the archival images observed in 2010 and 2019. In this study, we perform measurements and dynamical modeling of…

Earth and Planetary Astrophysics · Physics 2025-07-22 Bin Liu , Cunhui Li , Zhongcheng Mu , Xiaodong Liu

As a recently recognized class of objects exhibiting apparently cometary (sublimation-driven) activity yet orbiting completely within the main asteroid belt, main-belt comets (MBCs) have revealed the existence of present-day ice in small…

Earth and Planetary Astrophysics · Physics 2014-08-22 Henry H. Hsieh

It is well known that some Main Belt asteroids show comet-like features. A representative example is the first known Main Belt comet 133P/(7968) Elst-Pizarro. If the mechanisms causing this activity are too weak to develop visually evident…

Earth and Planetary Astrophysics · Physics 2014-01-23 S. Cikota , J. L. Ortiz , A. Cikota , N. Morales , G. Tancredi

The asteroids are primitive solar system bodies which evolve both collisionally and through disruptions due to rapid rotation [1]. These processes can lead to the formation of binary asteroids [2-4] and to the release of dust [5], both…

Earth and Planetary Astrophysics · Physics 2017-10-11 Jessica Agarwal , David Jewitt , Max Mutchler , Harold Weaver , Stephen Larson

Dynamically different groups of comets and active asteroids with orbits at 2 - 5 a. u. show dust activity in varying degrees and forms. Photometric study and comparison of physical parameters can help to classify mechanisms and nature of…

Earth and Planetary Astrophysics · Physics 2020-11-30 Serhii Borysenko , Alexander Baransky , Ekkehard Kuehrt , Stephan Hellmich , Stefano Mottola , Karen Meech

We announce the discovery of activity, in the form of a distinct cometary tail, emerging from main-belt asteroid 2015 VA108. Activity was first identified by volunteers of the Citizen Science project Active Asteroids (a NASA Partner). We…

We present the Citizen Science program Active Asteroids and describe discoveries stemming from our ongoing project. Our NASA Partner program is hosted on the Zooniverse online platform and launched on 2021 August 31, with the goal of…

We present archival observations of Main-belt asteroid (248370) 2005 QN173 (also designated 433P) that demonstrate this recently discovered active asteroid (a body with a dynamically asteroidal orbit displaying a tail or coma) has had at…

Earth and Planetary Astrophysics · Physics 2021-11-24 Colin Orion Chandler , Chadwick A. Trujillo , Henry H. Hsieh

We present observations using the Baade Magellan and Canada-France-Hawaii telescopes showing that main-belt comet 324P/La Sagra, formerly known as P/2010 R2, has become active again for the first time since originally observed to be active…

Earth and Planetary Astrophysics · Physics 2015-10-07 Henry H. Hsieh , Scott S. Sheppard

Main belt comets (MBCs) are a peculiar class of volatile-containing objects with comet-like morphology and asteroid-like orbits. However, MBCs are challenging targets to study remotely due to their small sizes and the relatively large…

Earth and Planetary Astrophysics · Physics 2019-11-20 B. Yang , E. Jehin , F. J. Pozuelos , Y. Moulane , Y. Shinnaka , C. Opitom , H. H. Hsieh , D. Hutsemékers , J. Manfroid

It has been suggested that the comet-like activity of Main Belt Comets are due to the sublimation of sub-surface water-ice that has been exposed as a result of their surfaces being impacted by m-sized bodies. We have examined the viability…

Earth and Planetary Astrophysics · Physics 2016-10-12 Nader Haghighipour , Thomas Maindl , Christoph Schaefer , Roland Speith , Rudolf Dvorak
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