2019 XS
Discovery [1][2] | |
---|---|
Discovered by | MLS |
Discovery site | Mt. Lemmon Obs. |
Discovery date | 2 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 arc | 21.68 yr (7,919 days) |
Earliest precovery date | 4 April 2000 |
Aphelion | 1.332 AU |
Perihelion | 0.6766 AU |
1.005 AU | |
Eccentricity | 0.3264 |
1.01 yr (367.74 days) | |
140.339° | |
0° 58m 44.218s / day | |
Inclination | 4.447° |
49.483° | |
250.285° | |
Earth MOID | 0.004003 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[]
- ^ a b c "2019 XS". Minor Planet Center. International Astronomical Union. Retrieved 12 October 2021.
- ^ a b "MPEC 2019-X47 : 2019 XS". Minor Planet Electronic Circular. Minor Planet Center. 4 December 2019. Retrieved 12 October 2021.
- ^ "2019 XS". NEO Exchange. Las Cumbres Observatory. 5 October 2021. Retrieved 12 October 2021.
- ^ a b c d e "JPL Small-Body Database Browser: (2019 XS)" (2021-12-09 last obs.). Jet Propulsion Laboratory. Retrieved 7 January 2022.
- ^ 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.
- ^ "2019 XS: Timing Assessment". International Asteroid Warning Network. 3 October 2021. Retrieved 12 October 2021.
- ^ "MPEC 2021-T79 : International Asteroid Warning Network (IAWN) Timing Campaign". Minor Planet Electronic Circular. Minor Planet Center. 5 October 2021. Retrieved 12 October 2021.
- ^ "MPEC 2020-V63 : 2019 XS". Minor Planet Electronic Circular. Minor Planet Center. 10 November 2020. Retrieved 12 October 2021.
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
- 2019 XS at NeoDyS-2, Near Earth Objects—Dynamic Site
- Ephemeris · Obs prediction · Orbital info · MOID · Proper elements · Obs info · Close · Physical info · NEOCC
- 2019 XS at ESA–space situational awareness
- 2019 XS at the JPL Small-Body Database
- Apollo asteroids
- Discoveries by MLS
- Minor planet object articles (unnumbered)
- Near-Earth objects in 2021
- Radar-imaged asteroids
- Astronomical objects discovered in 2019