Astronomy:2022 AE1

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Short description: Near-Earth asteroid for 2023


2022 AE1
Discovery[1]
Discovered byMount Lemmon Survey
Discovery siteMount Lemmon Obs.
Discovery date6 January 2022
Designations
2022 AE1
Minor planet category
Orbital characteristics[2]
Epoch 2022-Jan-21 (JD 2459600.5)
Uncertainty parameter 7
Observation arc20 days
|{{{apsis}}}|helion}}2.27 astronomical unit|AU (Q)
|{{{apsis}}}|helion}}0.667 AU (q)
1.47 AU (a)
Eccentricity0.547 (e)
Orbital period1.78 years
Mean anomaly39° (M)
Inclination6.3° (i)
Longitude of ascending node102.2° (Ω)
|{{{apsis}}}|helion}}10 November 2021
268.3° (ω)
Earth MOID0.00007 AU (10 thousand km)
Jupiter MOID3.2 AU (480 million km)
Physical characteristics
Mean diameter
  • ~70 m (200 ft)[3]
  • 54–120 meters
Absolute magnitude (H)23.49[4]


2022 AE1 is a Tunguska event-sized asteroid, classified as a near-Earth object of the Apollo group, approximately 70 meters (230 feet) in diameter.[5] It was discovered by the Mount Lemmon Survey on 6 January 2022, when it was 0.09 astronomical unit|AU (13 million km) from Earth.[1] On 9 January 2022 with an observation arc of 3 days, it was rated with a Torino scale of 1 for a virtual impactor on 4 July 2023 16:28 UTC.[3][lower-alpha 1] Nominal approach is expected to occur 1 July 2023 01:13 ± 1 day.[2][lower-alpha 2] With a Palermo scale rating of as high as –0.66 at the European Space Agency on 11 January 2022,[6] the odds of impact peaked at about 4.6[lower-alpha 3] times less than the background hazard level.[lower-alpha 4] NEODyS was the first risk-page to drop to Torino scale 0 on 12 January 2022[7] followed by ESA on 13 January 2022,[6] but by January 14 both returned to Torino scale 1. On 14 January 2022 the waxing gibbous moon was as little as 3 degrees from the asteroid delaying observations of the asteroid from January 12–19.[8] On 20 January 2022 with a 16-day observation arc, using JPL #11 the Sentry Risk Table dropped the asteroid to Torino scale 0 and then later that day JPL #12 resulted in it being removed from the risk table.[9][10]

2022 AE1 nominal approach for 4 July 2023 virtual impactor[lower-alpha 1]
Observation
arc
(in days) 		JPL Horizons
nominal geocentric
distance (AU) 		uncertainty
region
(3-sigma) 		Impact
probability
(1 in) 		Torino
scale
2.9 0.024 astronomical unit|AU (3.6 million km)[11] ± 38 million km[11] 2900 1
5.9 0.043 AU (6.4 million km)[12] ± 31 million km[12] 1800 1
7.1 0.043 AU (6.4 million km)[13] ± 22 million km[13] 1500 1
7.9 0.066 AU (9.9 million km)[14] ± 20 million km[14] 2800 1
8.1 0.039 AU (5.8 million km)[15] ± 12 million km[15] 1700 1
16.1 0.053 AU (7.9 million km)[16] ± 7 million km[16][lower-alpha 2] 71000 0
16.1
(JPL #12)		 0.059 AU (8.8 million km)[17] ± 5 million km[17] 0[3] 0[3]
20 0.072 AU (10.8 million km)[18] ± 4 million km[18] 0 0
2022 AE1
2023 Earth/Moon approach
JPL #15 (20-day arc)
Uncertainty: ± 1 day and ± 3.5 million km
Date & Time Approach
to 		Nominal distance
2023-Jul-01 01:13 ± 1 day Earth 9246404 km[2]
2023-Jul-01 03:44 Moon 9463958 km[19]

It came to perihelion (closest approach to the Sun) on 10 November 2021, and then approached Earth from the direction of the Sun making closest Earth approach on 31 December 2021 at distance of about 10 million km.[2]

See also

Notes

  1. ↑ 1.0 1.1 Earth traveling at 30 km/s and with a diameter of 12,800 km, only blocks the path of the asteroid for about 8 minutes (30 km/s * 60 sec * 8 min).
  2. ↑ 2.0 2.1 The JPL Small-Body Database close approach table lists a linearized uncertainty. Sentry computations explore alternate orbit solutions along the line of variations and account for orbit propagation nonlinearities.
  3. ↑ 100.66 = 4.57. JPL's Sentry Risk Table, ESA's Risk List and NEODyS will all list slightly different odds of impact and Palermo Technical Impact Hazard Scale values.
  4. ↑ "Background risk" is defined as the average risk posed by objects of the same size or larger over the years until the date of the potential impact.

References

  1. ↑ 1.0 1.1 "MPEC 2022-A56 : 2022 AE1". IAU Minor Planet Center. 2022-01-07. https://minorplanetcenter.net/mpec/K22/K22A56.html. Retrieved 2022-01-10.  (K22A01E)
  2. ↑ 2.0 2.1 2.2 2.3 "JPL Small-Body Database Browser: (2022 AE1)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=2022+AE1&view=OPC. Retrieved 2022-01-20. 
  3. ↑ 3.0 3.1 3.2 3.3 "Sentry Risk Table: 2022 AE1". NASA JPL CNEOS. https://cneos.jpl.nasa.gov/sentry/details.html#?des=2022%20AE1. 
  4. ↑ "2022 AE1 Orbit". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=2022+AE1. Retrieved 2022-01-20. 
  5. ↑ "ESA asteroid warning 2023: will "2022 AE1" hit Earth, or not? - Technology Org" (in en-US). 2022-12-17. https://www.technology.org/2022/12/17/esa-asteroid-warning-2023-will-it-hit-earth-or-not/. 
  6. ↑ 6.0 6.1 "ESA Risk List". European Space Agency near-earth objects coordination centre. https://neo.ssa.esa.int/risk-list. 
  7. ↑ "NEODyS-2 Impactor Table: 2022AE1". NEODyS CLOMON2. https://newton.spacedys.com/neodys/index.php?pc=1.1.2&n=2022AE1. 
  8. ↑ "JPL Horizons: 2022 AE1 Target-Observer-Moon (lunar elongation) for 13-17 January 2022". JPL Horizons. https://ssd.jpl.nasa.gov/horizons_batch.cgi?batch=1&COMMAND=%272022+AE1%27&START_TIME=%272022-01-13%27&STOP_TIME=%272022-01-17%27&STEP_SIZE=%271+hour%27&QUANTITIES=%279%2C25%27. 
  9. ↑ Neo, Operator. "Recap on the removal of 2022 AE1 from the risk list". European Space Agency Space Safety Programme. https://neo.ssa.esa.int/-/recap-on-the-removal-of-2022-ae1-from-the-risk-list. 
  10. ↑ "The rise and fall of the riskiest asteroid in a decade". European Space Agency. https://www.esa.int/Safety_Security/Planetary_Defence/The_rise_and_fall_of_the_riskiest_asteroid_in_a_decade. 
  11. ↑ 11.0 11.1 "JPL #4 Horizons Archive: 2022 AE1 geocentric distance and uncertainty with 2.9 day arc". JPL Horizons. https://ssd.jpl.nasa.gov/horizons_batch.cgi?batch=1&COMMAND=%272022+AE1%27&START_TIME=%272023-07-04+16:34%27&STOP_TIME=%272023-07-05%27&STEP_SIZE=%271+day%27&QUANTITIES=%2720%2C39%27. 
  12. ↑ 12.0 12.1 "JPL #5 Horizons Archive: 2022 AE1 geocentric distance and uncertainty with 5.8 day arc". JPL Horizons. https://ssd.jpl.nasa.gov/horizons_batch.cgi?batch=1&COMMAND=%272022+AE1%27&START_TIME=%272023-07-04+16:34%27&STOP_TIME=%272023-07-05%27&STEP_SIZE=%271+day%27&QUANTITIES=%2720%2C39%27. 
  13. ↑ 13.0 13.1 "JPL #6 Horizons Archive: 2022 AE1 geocentric distance and uncertainty with 7.1 day arc". JPL Horizons. https://ssd.jpl.nasa.gov/horizons_batch.cgi?batch=1&COMMAND=%272022+AE1%27&START_TIME=%272023-07-04+16:28%27&STOP_TIME=%272023-07-05%27&STEP_SIZE=%271+day%27&QUANTITIES=%2720%2C39%27. 
  14. ↑ 14.0 14.1 "JPL #7 Horizons Archive: 2022 AE1 geocentric distance and uncertainty with 7.9 day arc". JPL Horizons. https://ssd.jpl.nasa.gov/horizons_batch.cgi?batch=1&COMMAND=%272022+AE1%27&START_TIME=%272023-07-04+16:28%27&STOP_TIME=%272023-07-05%27&STEP_SIZE=%271+day%27&QUANTITIES=%2720%2C39%27. 
  15. ↑ 15.0 15.1 "JPL #10 Horizons Archive: 2022 AE1 geocentric distance and uncertainty with 8.1 day arc". JPL Horizons. https://ssd.jpl.nasa.gov/horizons_batch.cgi?batch=1&COMMAND=%272022+AE1%27&START_TIME=%272023-07-04+16:28%27&STOP_TIME=%272023-07-05%27&STEP_SIZE=%271+day%27&QUANTITIES=%2720%2C39%27. 
  16. ↑ 16.0 16.1 "JPL #11 Horizons Archive: 2022 AE1 geocentric distance and uncertainty with 16 day arc". JPL Horizons. https://ssd.jpl.nasa.gov/horizons_batch.cgi?batch=1&COMMAND=%272022+AE1%27&START_TIME=%272023-07-04+16:28%27&STOP_TIME=%272023-07-05%27&STEP_SIZE=%271+day%27&QUANTITIES=%2720%2C39%27. 
  17. ↑ 17.0 17.1 "JPL #13 Horizons Archive: 2022 AE1 geocentric distance and uncertainty with 16 day arc". JPL Horizons. https://ssd.jpl.nasa.gov/horizons_batch.cgi?batch=1&COMMAND=%272022+AE1%27&START_TIME=%272023-07-04+16:28%27&STOP_TIME=%272023-07-05%27&STEP_SIZE=%271+day%27&QUANTITIES=%2720%2C39%27. 
  18. ↑ 18.0 18.1 "JPL #15 Horizons Archive: 2022 AE1 geocentric distance and uncertainty with 20 day arc". JPL Horizons. https://ssd.jpl.nasa.gov/horizons_batch.cgi?batch=1&COMMAND=%272022+AE1%27&START_TIME=%272023-07-04+16:28%27&STOP_TIME=%272023-07-05%27&STEP_SIZE=%271+day%27&QUANTITIES=%2720%2C39%27. 
  19. ↑ "Moon Horizons Batch for 2023-Jul-01". JPL Horizons. https://ssd.jpl.nasa.gov/horizons_batch.cgi?batch=1&COMMAND=%272022+AE1%27&START_TIME=%272023-Jul-01%27&STOP_TIME=%272023-Jul-03%27&STEP_SIZE=%2710+min%27&QUANTITIES=%2720,39%27&CENTER=%27@301%27. Retrieved 2021-01-20. 

External links



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