2020 XR
Discovery Perihelion | 0.97013 AU (145,129,000 km) (q) | |
---|---|---|
2.4987 AU (373,800,000 km) (a) | ||
Eccentricity | 0.61174 (e) | |
3.95 yr | ||
312.19° (M) | ||
Inclination | 13.947° (i) | |
249.74° (Ω) | ||
8 December 2020 | ||
163.01° (ω) | ||
Earth MOID | 0.00085 AU (127,000 km; 0.33 LD) | |
Jupiter MOID | 1.4 AU (210,000,000 km) | |
Physical characteristics | ||
Mean diameter | ~390 meters (1,000 feet)[4] | |
19.8[2][3] | ||
2020 XR is an
Discovery
2020 XR was discovered by
On 13 December 2020, precovery observations from 2013, 2016, and mid-2020 extended the observation arc from 8 days to 7.8 years allowing the asteroid to be removed from the Sentry Risk Table.[2][4]
2024
It was the Earth perturbations of the asteroid in 2024 that determined if an impact was possible in December 2028. On 4 December 2024, the asteroid will pass 0.0147 AU (2.20 million km; 5.7 LD) from Earth with an uncertainty region of about ±800 km.[3] This will increase the asteroid's orbital period by 10 days.
Parameter | Epoch (date) |
Orbital Period |
---|---|---|
Units | (days) | |
Pre-flyby | 2024-Sep-04 | 1441 |
Post-flyby | 2025-Mar-04 | 1451 |
2028
On 7 November 2028, the asteroid will pass 0.121 AU (18.1 million km) from Earth.[3] By 1 December 2028 the asteroid will be 0.19 AU (28 million km) from Earth[6] with an uncertainty region of about ±10,000 km.[a]
Notes
- ^ While the observation arc was only a few days, the uncertainty region on 1 December 2028 was approximately a billion km.
References
- ^ "MPEC 2020-X365 : 2020 XR". IAU Minor Planet Center. 7 December 2020. Retrieved 13 December 2020. (K20X00R)
- ^ a b c d e f "2020 XR". Minor Planet Center. Retrieved 13 December 2020.
- ^ a b c d e f "JPL Small-Body Database Browser: (2020 XR)" (last observation: 2020-12-12; arc: 7.8 years). Jet Propulsion Laboratory. Archived from the original on 13 December 2020. Retrieved 13 November 2020.
- ^ a b c d "Earth Impact Risk Summary: 2020 XR". NASA/JPL Near-Earth Object Program Office. Archived from the original on 10 December 2020. Retrieved 13 December 2020.
- ^ hohmanntransfer: 2020 XR (10 Dec 2020) (1/11000 = 9E-05)
- ^ "2020XR Ephemerides for 1 December 2028". NEODyS (Near Earth Objects – Dynamic Site). Archived from the original on 12 December 2020. Retrieved 13 December 2020.
External links
- Asteroid Hazards, Part 3: Finding the Path – YouTube video by the Minor Planet Center (26 August 2015)
- 2020 XR at NeoDyS-2, Near Earth Objects—Dynamic Site
- 2020 XR at ESA–space situational awareness
- 2020 XR at the JPL Small-Body Database