Emissions from Artificial Object Re-entries


Welcome to this website from the UCL Atmospheric Composition and Air Quality Group detailing the emissions from objects re-entering the atmosphere at the start of the megaconstellation era. The Globe and Map views show the location and ID of each re-entry in the selected time window. The Bar view shows the total emissions generated by all re-entries in the selected time window. For more information, see the FAQs at the bottom of this page.

Please select a date during 2020-2022 (2023-2024 will be released shortly). Large ranges may be slow to load.



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Map
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Re-entry Details (see footer for more information)

Date ID Time Location Name Cat. SMC Al2O3 NOx BC HCl Cl Unablated Mass
* Emissions in tonnes, time in UTC. SMC = Satellite Megaconstellation. Cat. = Category. P = Payload, C = Component, B = Booster, S = Stage.

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Frequently Asked Questions

Developed by Connor Barker (UCL postdoc) and Eloise Marais (UCL PI), in collaboration with Jonathan McDowell (Harvard-Smithsonian Center for Astrophysics). Interested in using the data or spot any room for improvements? Please reach out to Connor Barker at connor.barker@ucl.ac.uk.

Funding Disclaimer: This project has received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (grant agreement No. 851854). European Commission project page.