Английская Википедия:2019 XS
Шаблон:Use dmy dates Шаблон:Infobox planet 2019 XS is a small Apollo near-Earth asteroid discovered on 2 December 2019 by the Mount Lemmon Survey in Arizona, United States.[1] It passed Шаблон:Convert from Earth on 9 November 2021 at 03:48 UTC, after which observations were checked by the International Asteroid Warning Network for timing and astrometric accuracy.[2][3][4] During the close pass, the asteroid trailed across the far Southern Hemisphere to the Northern Hemisphere and reached a peak apparent magnitude of 13. A total of 957 observations were collected by Minor Planet Center as part of the International Asteroid Warning Network's campaign.[5]
2019 XS is well-observed with a long observation arc of over 21 years, enough to distinguish subtle changes in its orbit over time due non-gravitational acceleration by the Yarkovsky effect.[6][5] Highly precise radar observations by NASA's Goldstone Solar System Radar on 11 November 2021 have significantly constrained the asteroid's orbit and 2021 close approach distance to within a few kilometres.[6] Radar imaging has shown that the asteroid is roughly Шаблон:Cvt in diameter, with a rotation period around 3 hours.[7]
Continuous photometric observations by the Center for Solar System Studies in Landers, California show an irregular light curve for 2019 XS, signifying that the asteroid is in a tumbling rotation state.[8] The light curve of 2019 XS appears to display two overlapping periods of 2.35 and 3.01 hours, which could possibly be associated with the asteroid's rotation and precession.[8]
Exploration
2019 XS may be a potential target for the LICIACube mission after the completion of its primary mission.[9]
See also
- Шаблон:Mpl, another near-Earth asteroid with a dedicated IAWN timing campaign
References
External links
- 2019 XS: Timing Assessment, International Asteroid Warning Network, 3 October 2021
- Goldstone Radar Observations Planning: Orpheus, 2004 UE, 2019 XS, and 2010 VK139, Lance A. M. Benner, Jet Propulsion Laboratory
- Шаблон:NeoDys
- Шаблон:ESA-SSA
- Шаблон:JPL small body
Шаблон:2021 in space Шаблон:Small Solar System bodies Шаблон:Portal bar Шаблон:Authority control
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