2022 UR4

2022 UR4
Discovery[1][2]
Discovered byATLAS-MLO
Discovery siteMauna Loa Obs.
Discovery date20 November 2022
Designations
2022 WM7
A10OBKV[3]
NEO · Apollo[1]
Orbital characteristics[4]
Epoch 25 February 2023 (JD 2460000.5)
Uncertainty parameter 6
Observation arc13.56 hours[1]
Aphelion2.701 AU
Perihelion0.831 AU
1.766 AU
Eccentricity0.5294
2.35 yr (857.0 days)
36.030°
0° 25m 12.279s / day
Inclination11.292°
207.182°
December 2022[4]
238.577°
Earth MOID0.000407 AU (60,900 km; 0.158 LD)
Jupiter MOID2.641 AU
Physical characteristics
4.4–9.9 m (assumed albedo 0.05–0.25)[5]
28.90±0.45[4]

2022 UR4 is a small near-Earth asteroid that made an extremely close approach within 0.044 lunar distances (17,000 km; 11,000 mi) from Earth's center on 20 October 2022 at 22:45 UTC.[4] It was discovered about 14 hours before closest approach by the Asteroid Terrestrial-impact Last Alert System (ATLAS) survey telescope at Mauna Loa Observatory, Hawaii on 20 November 2022.[2] During the close approach, the asteroid passed above the northern hemisphere of Earth and reached a peak brightness of magnitude 10,[2] just 40 times fainter than the threshold of naked eye visibility.[a]

  1. ^ a b c Cite error: The named reference MPC-object was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference MPEC-2022-U145 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference NEOExchange was invoked but never defined (see the help page).
  4. ^ a b c d Cite error: The named reference jpldata was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference sizeestimator was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference magnitude was invoked but never defined (see the help page).


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