International Asteroid Warning Network Timing Campaign: 2019 XS

Abstract As part of the International Asteroid Warning Network's observational exercises, we conducted a campaign to observe near-Earth asteroid 2019 XS around its close approach to Earth on 2021 November 9. The goal of the campaign was to characterize errors in the observation times reported t...

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Bibliographic Details
Published in:The planetary science journal 2022-07, Vol.3 (7), p.156
Main Authors: Farnocchia, Davide, Reddy, Vishnu, Bauer, James M., Warner, Elizabeth M., Micheli, Marco, Payne, Matthew J., Farnham, Tony, Kelley, Michael S., Balam, David D., Barkov, Anatoly P., Berteşteanu, Daniel, Birlan, Mirel, Bolin, Bryce T., Brucker, Melissa J., Buzzi, Luca, Chambers, Kenneth C., Demetz, Lukas, Djupvik, Anlaug A., Elenin, Leonid, Fini, Paolo, Flynn, Randy, Galli, Gianni, Gao, Xing, Gȩdek, Marcin, Granvik, Mikael, Hasubick, Werner, Ivanov, Alexander L., Ivanov, Viktor A., Ivanova, Natalya V., Jaques, Cristóvão, Kasikov, Anni, Kim, Myung-Jin, Lane, David, Lee, Hee-Jae, Li, Bin, Li, Fan, Lister, Tim, Lysenko, Vadim E., Magnier, Eugene A., Mahomed, Nawaz, McCormick, Jennie, Moon, Darrel, Nastasi, Alessandro, Nedelcu, Dan A., Neue, Guenther, Petrescu, Elisabeta, Popescu, Marcel, Prosperi, Enrico, Reszelewski, Rafał, Roh, Dong-Goo, Romanov, Filipp D., Santana-Ros, Toni, Schmalz, Anastasia, Schmalz, Sergei, Scotti, James V., Seaman, Robert, Sioulas, Nick, Sonka, Adrian B., Tholen, David J., Trelia, Madalina M., Wainscoat, Richard, Wang, Xin, Wells, Guy, Weryk, Robert, Yakovenko, Nikolai A., Ye, Quanzhi, Yim, Hong-Suh, Zhai, Chengxing, Zhang, Chen, Zhao, Haibin, Zhu, Tinglei, Żołnowski, Michał
Format: Article
Language:English
Subjects:
Asteroids
Astrometry
Near-Earth objects
Onboard space systems
Optical telescopes
Rymdtekniska system
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Summary:Abstract As part of the International Asteroid Warning Network's observational exercises, we conducted a campaign to observe near-Earth asteroid 2019 XS around its close approach to Earth on 2021 November 9. The goal of the campaign was to characterize errors in the observation times reported to the Minor Planet Center, which become an increasingly important consideration as astrometric accuracy improves and more fast-moving asteroids are observed. As part of the exercise, a total of 957 astrometric observations of 2019 XS during the encounter were reported and subsequently were analyzed to obtain the corresponding residuals. While the timing errors are typically smaller than 1 s, the reported times appear to be negatively biased, i.e., they are generally earlier than they should be. We also compared the observer-provided position uncertainty with the cross-track residuals, which are independent of timing errors. A large fraction of the estimated uncertainties appear to be optimistic, especially when
ISSN:2632-3338
2632-3338
DOI:10.3847/PSJ/ac7224