astro.wikisort.org - Asteroid

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]

2022 QX₄

Discovery[1]
Discovered by	ATLAS (W68)
Discovery date	24 August 2022
Designations
MPC designation	2022 QX4
Minor planet category	Aten NEO risk listed[2]
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)
Semi-major axis	0.6809 AU (a)
Eccentricity	0.50481 (e)
Orbital period (sidereal)	0.562 years
Mean anomaly	154.3° (M)
Inclination	0.14800° (i)
Longitude of ascending node	335.6° (Ω)
Time of perihelion	13 May 2022
Argument of perihelion	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	~40 m (100 ft)[2] 30–70 meters
Absolute magnitude (H)	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 130000 km from Earth on 5 September 1977.[3]

References

External links

• 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
  • Ephemerides · Observation prediction · Orbital info · MOID · Proper elements · Observational info · Close approaches · Physical info · Orbit animation
• 2022 QX4 at ESA–space situational awareness
  • Ephemerides · Observations · Orbit · Physical properties · Summary
• 2022 QX4 at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

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