| Discovery[1][2] | |
|---|---|
| Discovered by | ATLAS-MLO |
| Discovery site | Mauna Loa Obs. |
| Discovery date | 26 November 2022 |
| Designations | |
| 2022 WM7 | |
| A10OBKV[3] | |
| NEO · Apollo[1] | |
| Orbital characteristics[4] | |
| Epoch 25 February 2023 (JD 2460000.5) | |
| Uncertainty parameter 6 | |
| Observation arc | 13.56 hours[1] |
| Aphelion | 2.701 AU |
| Perihelion | 0.831 AU |
| 1.766 AU | |
| Eccentricity | 0.5294 |
| 2.35 yr (857.0 days) | |
| 36.030° | |
| 0° 25m 12.279s / day | |
| Inclination | 11.292° |
| 207.182° | |
| December 2022[4] | |
| 238.577° | |
| Earth MOID | 0.000407 AU (60,900 km; 0.158 LD) |
| Jupiter MOID | 2.641 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]
- ^ a b c Cite error: The named reference
MPC-objectwas invoked but never defined (see the help page). - ^ a b c Cite error: The named reference
MPEC-2022-U145was invoked but never defined (see the help page). - ^ Cite error: The named reference
NEOExchangewas invoked but never defined (see the help page). - ^ a b c d Cite error: The named reference
jpldatawas invoked but never defined (see the help page). - ^ Cite error: The named reference
sizeestimatorwas invoked but never defined (see the help page). - ^ a b Cite error: The named reference
magnitudewas invoked but never defined (see the help page).
Cite error: There are <ref group=lower-alpha> tags or {{efn}} templates on this page, but the references will not show without a {{reflist|group=lower-alpha}} template or {{notelist}} template (see the help page).