The morphology of contact binary objects in the Solar System
- 1Institute for Astronomy, University of Edinburgh , Royal Observatory, Edinburgh, EH9 3HJ ,
Abstract
Contact binaries, appearing as two objects stuck together, are prevalent throughout the Solar System, making up between 30-50% of asteroids and comets. Despite this, detailed shape models of contact binaries are hard to obtain remotely, requiring rare occultation events or close approaches to Earth (<0.1 au) to observe with ground-based radar systems. Despite only 16 contact binary models being published, there already exists a wide variety of different arrangements of the two lobes relative to one another. At the same time, simulations of contact binary object formation are increasing in scale, producing 10s to 1000s of contact binary candidates per simulation. It is therefore necessary to begin the process of characterising the different shapes observed, and to further investigate any emerging trends. We analyse the size, period, neck prominence, volume distribution, ratio between the sizes and volumes of the individual lobes, and the alignment between them to summarise the extent of the currently modelled asteroids.
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BibTeX
@article{cannon2026morphology,
title = {{The morphology of contact binary objects in the Solar System}},
author = {Richard E Cannon and Agata Rożek and Colin Snodgrass},
journal = {Monthly Notices of the Royal Astronomical Society},
year = {2026},
month = oct,
doi = {10.1093/mnras/stag2019},
url = {https://academic.oup.com/mnras/advance-article/doi/10.1093/mnras/stag2019/8993892},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - The morphology of contact binary objects in the Solar System
AU - Richard E Cannon
AU - Agata Rożek
AU - Colin Snodgrass
PY - 2026
DA - 2026/10/23
JO - Monthly Notices of the Royal Astronomical Society
DO - 10.1093/mnras/stag2019
UR - https://academic.oup.com/mnras/advance-article/doi/10.1093/mnras/stag2019/8993892
AB - Contact binaries, appearing as two objects stuck together, are prevalent throughout the Solar System, making up between 30-50% of asteroids and comets. Despite this, detailed shape models of contact binaries are hard to obtain remotely, requiring rare occultation events or close approaches to Earth (<0.1 au) to observe with ground-based radar systems. Despite only 16 contact binary models being published, there already exists a wide variety of different arrangements of the two lobes relative to one another. At the same time, simulations of contact binary object formation are increasing in scale, producing 10s to 1000s of contact binary candidates per simulation. It is therefore necessary to begin the process of characterising the different shapes observed, and to further investigate any emerging trends. We analyse the size, period, neck prominence, volume distribution, ratio between the sizes and volumes of the individual lobes, and the alignment between them to summarise the extent of the currently modelled asteroids.
SN - 0035-8711
SN - 1365-2966
ER -