2022 QX4 is a Tunguska event-sized asteroid, classified as a near-Earth object of the Aten group, approximately 40 meters (130 feet) in diameter.[2] It was discovered by ATLAS on 24 August 2022,[1] when it was 0.03 AU (4.5 million km) from Earth. On 4 September 2022 with an observation arc of 8 days, it was listed with a 1-in-109 chance of impacting Earth with a Torino scale of 1 for a virtual impactor on 4 September 2068 00:52 UTC.[2] Five precovery images from August 2013 were published on 11 September 2022[4] extending the observation arc to 9 years and 2022 QX4 was removed from the Sentry Risk Table. The nominal approach is expected to occur 26 August 2068.[5]
| Discovery[1] | |
|---|---|
| Discovered by | ATLAS (W68) |
| Discovery date | 24 August 2022 |
| Designations | |
| 2022 QX4 | |
| Orbital characteristics[3] | |
| Epoch 2022-Aug-09 (JD 2459800.5) | |
| Uncertainty parameter 2 | |
| Observation arc | 9 years |
| Earliest precovery date | 16 August 2013 |
| Aphelion | 1.025 AU (Q) |
| Perihelion | 0.33713 AU (q) |
| 0.6809 AU (a) | |
| Eccentricity | 0.50481 (e) |
| 0.562 years | |
| 154.3° (M) | |
| Inclination | 0.14800° (i) |
| 335.6° (Ω) | |
| 13 May 2022 | |
| 176.2° (ω) | |
| Earth MOID | 0.00027 AU (40 thousand km; 0.11 LD) |
| Jupiter MOID | 3.97 AU (594 million km) |
| Physical characteristics | |
| Dimensions |
|
| 24.7[1] | |
Closest approach to Earth in 2022 occurred on 29 August 2022 at a distance of about 1.8 million km.[3] The asteroid passed about 130,000 km (0.34 LD) from Earth on 5 September 1977.[3]
References
edit- ^ a b c "2022 QX4 Orbit". Minor Planet Center. Retrieved 11 September 2022.
- ^ a b c d "Archive of ESA Risk List". European Space Agency near-earth objects coordination centre. Archived from the original on 4 September 2022.
- ^ a b c "JPL Small-Body Database Browser: (2022 QX4)". Jet Propulsion Laboratory. Archived from the original on 31 August 2022. Retrieved 11 September 2022.
- ^ "MPEC 2022-R148 : 2022 QX4". IAU Minor Planet Center. 11 September 2022. Retrieved 11 September 2022. (K22Q04X)
- ^ "2022 QX4 geocentric distance from 08-26 to 09-06 (2068)". JPL Horizons. Archived from the original on 11 September 2022.
External links
edit- Archive of Sentry Risk Table entry for 2022 QX4 with a 8-day observation arc and a cumulative 0.69% of an Earth impact
- (Expired) risk corridor for 2022 QX4
- Found archival observations of 2022 QX4 from 2013 (MPML 3 September 2022)
- 2022 QX4 at NeoDyS-2, Near Earth Objects—Dynamic Site
- 2022 QX4 at ESA–space situational awareness
- 2022 QX4 at the JPL Small-Body Database