2019 XS

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2019 XS
2019XS Goldstone radar Nov11.gif
Goldstone radar images of 2019 XS taken on 11 November 2021
Discovery [1][2]
Discovered byMLS
Discovery siteMt. Lemmon Obs.
Discovery date2 December 2019
Designations
MPC designation
2019 XS
C1HDFQ2 [3]
Minor planet category
NEO · Apollo [4]
Orbital characteristics [4]
Epoch 21 January 2022 (JD 2459600.5)
Uncertainty parameter 0
Observation arc21.68 yr (7,919 days)
Earliest precovery date4 April 2000
Aphelion1.332 AU
Perihelion0.6766 AU
1.005 AU
Eccentricity0.3264
1.01 yr (367.74 days)
140.339°
0° 58m 44.218s / day
Inclination4.447°
49.483°
250.285°
Earth MOID0.004003 AU (598,800 km)
Physical characteristics
Mean diameter
~70 m [5]
Synodic rotation period
~3 hr [5]
Absolute magnitude (H)
23.96±0.33 [4]
23.87 [1]

2019 XS is a small Apollo near-Earth asteroid discovered on 2 December 2019 by the Mount Lemmon Survey in Arizona, United States.[2] It passed 1.493 lunar distances (574,000 km; 357,000 mi) from Earth on 9 November 2021 at 03:48 UTC, after which observations were checked by the International Asteroid Warning Network for timing accuracy.[6][7][8] During the close pass, the asteroid trailed across the far Southern Hemisphere to the Northern Hemisphere and reached a peak apparent magnitude of 13. Over 1,500 observations of 2019 XS were collected by the Minor Planet Center during the 2021 apparition.[1]

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 to non-gravitational forces.[4] 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.[4] Radar imaging has shown that the asteroid is roughly 70 m (230 ft) in diameter, with a rotation period around 3 hours.[5]

See also[]

  • 2012 TC4, another near-Earth asteroid with a dedicated IAWN timing campaign

References[]

  1. ^ a b c "2019 XS". Minor Planet Center. International Astronomical Union. Retrieved 12 October 2021.
  2. ^ a b "MPEC 2019-X47 : 2019 XS". Minor Planet Electronic Circular. Minor Planet Center. 4 December 2019. Retrieved 12 October 2021.
  3. ^ "2019 XS". NEO Exchange. Las Cumbres Observatory. 5 October 2021. Retrieved 12 October 2021.
  4. ^ a b c d e "JPL Small-Body Database Browser: (2019 XS)" (2021-12-09 last obs.). Jet Propulsion Laboratory. Retrieved 7 January 2022.
  5. ^ a b c Benner, Lance A. M. "Goldstone Radar Observations Planning: Orpheus, 2004 UE, 2019 XS, and 2010 VK139". Jet Propulsion Laboratory. California Institute of Technology. Retrieved 12 November 2021.
  6. ^ "2019 XS: Timing Assessment". International Asteroid Warning Network. 3 October 2021. Retrieved 12 October 2021.
  7. ^ "MPEC 2021-T79 : International Asteroid Warning Network (IAWN) Timing Campaign". Minor Planet Electronic Circular. Minor Planet Center. 5 October 2021. Retrieved 12 October 2021.
  8. ^ "MPEC 2020-V63 : 2019 XS". Minor Planet Electronic Circular. Minor Planet Center. 10 November 2020. Retrieved 12 October 2021.

External links[]

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