Astrometric follow-up of near-Earth asteroid 2024 YR4 during a Torino scale level 3 alert
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| Format: | Preprint |
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2026
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| _version_ | 1866908818101764096 |
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| author | Micheli, Marco Devogèle, Maxime Denneau, Larry Ryan, Eileen V. Ryan, William H. Pravec, Petr Hornoch, Kamil Kučáková, Hana Fatka, Petr Brucker, Melissa J. Lejoly, Cassandra Moskovitz, Nicholas Granvik, Mikael Gray, Zuri Fedorets, Grigori Djupvik, Anlaug Amanda Fuls, Carson Rankin, David Wierzchoś, Kacper Gray, Bill Lister, Tim Wainscoat, Richard J. Weryk, Robert Hainaut, Olivier R. Spoto, Federica Veres, Peter Rivkin, Andrew S. Holler, Bryan J. Burdanov, Artem Y. de Wit, Julien Farnocchia, Davide Rudawska, Regina Peleato, Eduardo Alonso Ocaña, Francisco Tonry, John Audenaert, Jeroen Faggioli, Laura Gianotto, Francesco Fenucci, Marco Conversi, Luca Moissl, Richard |
| author_facet | Micheli, Marco Devogèle, Maxime Denneau, Larry Ryan, Eileen V. Ryan, William H. Pravec, Petr Hornoch, Kamil Kučáková, Hana Fatka, Petr Brucker, Melissa J. Lejoly, Cassandra Moskovitz, Nicholas Granvik, Mikael Gray, Zuri Fedorets, Grigori Djupvik, Anlaug Amanda Fuls, Carson Rankin, David Wierzchoś, Kacper Gray, Bill Lister, Tim Wainscoat, Richard J. Weryk, Robert Hainaut, Olivier R. Spoto, Federica Veres, Peter Rivkin, Andrew S. Holler, Bryan J. Burdanov, Artem Y. de Wit, Julien Farnocchia, Davide Rudawska, Regina Peleato, Eduardo Alonso Ocaña, Francisco Tonry, John Audenaert, Jeroen Faggioli, Laura Gianotto, Francesco Fenucci, Marco Conversi, Luca Moissl, Richard |
| contents | The discovery of 2024 YR4 presented the planetary defense community with the most significant impact threat in almost two decades, reaching level 3 on the Torino scale. The community, now mature and well-organized, responded with a global observational effort. Astrometric measurements, forming the basis for orbital refinement and impact prediction, were a central component of this response. In this paper, we present the astrometric data collected by the international community, from the time of discovery until the object became too faint for all existing observational assets, including JWST. We also discuss the coordination role played by the International Asteroid Warning Network, and the importance of publicly available image archives to enable precovery searches. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_06890 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Astrometric follow-up of near-Earth asteroid 2024 YR4 during a Torino scale level 3 alert Micheli, Marco Devogèle, Maxime Denneau, Larry Ryan, Eileen V. Ryan, William H. Pravec, Petr Hornoch, Kamil Kučáková, Hana Fatka, Petr Brucker, Melissa J. Lejoly, Cassandra Moskovitz, Nicholas Granvik, Mikael Gray, Zuri Fedorets, Grigori Djupvik, Anlaug Amanda Fuls, Carson Rankin, David Wierzchoś, Kacper Gray, Bill Lister, Tim Wainscoat, Richard J. Weryk, Robert Hainaut, Olivier R. Spoto, Federica Veres, Peter Rivkin, Andrew S. Holler, Bryan J. Burdanov, Artem Y. de Wit, Julien Farnocchia, Davide Rudawska, Regina Peleato, Eduardo Alonso Ocaña, Francisco Tonry, John Audenaert, Jeroen Faggioli, Laura Gianotto, Francesco Fenucci, Marco Conversi, Luca Moissl, Richard Earth and Planetary Astrophysics Instrumentation and Methods for Astrophysics The discovery of 2024 YR4 presented the planetary defense community with the most significant impact threat in almost two decades, reaching level 3 on the Torino scale. The community, now mature and well-organized, responded with a global observational effort. Astrometric measurements, forming the basis for orbital refinement and impact prediction, were a central component of this response. In this paper, we present the astrometric data collected by the international community, from the time of discovery until the object became too faint for all existing observational assets, including JWST. We also discuss the coordination role played by the International Asteroid Warning Network, and the importance of publicly available image archives to enable precovery searches. |
| title | Astrometric follow-up of near-Earth asteroid 2024 YR4 during a Torino scale level 3 alert |
| topic | Earth and Planetary Astrophysics Instrumentation and Methods for Astrophysics |
| url | https://arxiv.org/abs/2602.06890 |