(679648) 2019 XS

Asteroid October 2021 yes (679648) 2019 XS #FFC2E0 File:2019XS Goldstone radar Nov11.gif Goldstone radar images of 2019 XS taken on 11 November 2021 MLS Mt. Lemmon Obs. 2 December 2019 2019 XS C1HDFQ2 NEOApollo 21 January 2022 (JD 2459600.5) 0 21.68 yr (7,919 days) 4 April 2000 1.332 AU 0.6766 AU 1.005 AU 0.3264 1.01 yr (367.74 days) 140.339° 0.9789494 ms / day 4.447° 49.483° 250.285° 0.004003 AU km ~70 m 2.35 0.01 h3.01 0.01 h 23.96 0.3323.87 (679648) 2019 XS is a small Apollo near-Earth asteroid discovered on 2 December 2019 by the Mount Lemmon Survey in Arizona, United States. It passed 1.493 LD km mi in out 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. 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. 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. 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. Radar imaging has shown that the asteroid is roughly 70 m ft in diameter, with a rotation period around 3 hours. 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. 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. See also 2012 TC 4, another near-Earth asteroid with a dedicated IAWN timing campaign References 2021-12-09 last obs. JPL Small-Body Database Browser: (2019 XS) https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=2019XS&view=OPC Jet Propulsion Laboratory 7 January 2022 2019 XS http://www.minorplanetcenter.net/db_search/show_object?object_id=2019+XS Minor Planet Center International Astronomical Union 12 October 2021 2019 XS https://neoexchange.lco.global/target/55343/ NEO Exchange Las Cumbres Observatory 5 October 2021 12 October 2021 MPEC 2019-X47 : 2019 XS https://minorplanetcenter.net/mpec/K19/K19X47.html Minor Planet Electronic Circular Minor Planet Center 4 December 2019 12 October 2021 MPEC 2020-V63 : 2019 XS https://www.minorplanetcenter.net/mpec/K20/K20V63.html Minor Planet Electronic Circular Minor Planet Center 10 November 2020 12 October 2021 MPEC 2021-T79 : International Asteroid Warning Network (IAWN) Timing Campaign https://minorplanetcenter.net/mpec/K21/K21T79.html Minor Planet Electronic Circular Minor Planet Center 5 October 2021 12 October 2021 2019 XS: Timing Assessment https://iawn.net/obscamp/2019XS/ International Asteroid Warning Network 3 October 2021 12 October 2021 Goldstone Radar Observations Planning: Orpheus, 2004 UE, 2019 XS, and 2010 VK139 https://echo.jpl.nasa.gov/asteroids/Orpheus/Orpheus.2021.goldstone.planning.html Lance A. M. Benner Jet Propulsion Laboratory California Institute of Technology 12 November 2021 Brian D. Warner Robert D. Stephens Near-Earth Asteroid Lightcurve Analysis at the Center for Solar System Studies: 2021 October–December https://articles.adsabs.harvard.edu/pdf/2022MPBu...49...83W The Minor Planet Bulletin April 2022 49 2 83–89 2022MPBu...49...83W etal Davide Farnocchia Vishnu Reddy James M. Bauer Elizabeth M. Warner Marco Micheli Matthew J. Payne International Asteroid Warning Network Timing Campaign: 2019 XS The Planetary Science Journal July 2022 3 7 156 13 10.3847/PSJ/ac7224 2022PSJ.....3..156F free 10045/125567 free 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 2019xs 2019XS 20679648 collapsed 679648 (679648) 2019 XS Astronomy Outer Space Category:Apollo asteroids Category:Discoveries by MLS 20210216 Category:Radar-imaged asteroids 20191202