astro.wikisort.org - Asteroid
2020 UA is a tiny near-Earth asteroid around 5–12 metres (16–39 ft) across that passed within 46,100 km (28,600 mi) of Earth on 21 October 2020 at 02:00 UT.[5]
| Discovery [1][2] | |
|---|---|
| Discovered by | Mount Lemmon Survey |
| Discovery site | Mt. Lemmon Obs. |
| Discovery date | 16 October 2020 |
| Designations | |
MPC designation | 2020 UA |
Alternative designations | C3K1WP2 [3][4] |
Minor planet category | NEO · Aten [5] |
| Orbital characteristics [5] | |
| Epoch 31 May 2020 (JD 2459000.5) | |
| Uncertainty parameter 4 | |
| Observation arc | 4 days |
| Aphelion | 1.206 AU |
| Perihelion | 0.7537 AU |
Semi-major axis | 0.980 AU |
| Eccentricity | 0.23093 |
Orbital period (sidereal) | 0.97 yr |
Mean anomaly | 133.866° |
Mean motion | 1° 0m 57.005s / day |
| Inclination | 2.762° |
Longitude of ascending node | 27.909° |
Time of perihelion | 20 January 2020 05:17 UT [5] |
Argument of perihelion | 27.909° |
| Earth MOID | 0.000204 AU (30,500 km) |
| Physical characteristics | |
Mean diameter | 5–12 m (assumed albedo 0.05–0.25)[6] |
Apparent magnitude | 20.8 (at discovery)[1] |
Absolute magnitude (H) | 28.39±0.38[5] 28.43[2] |
References
- "MPEC 2020-U52 : 2020 UA". Minor Planet Electronic Circular. Minor Planet Center. 17 October 2020. Retrieved 19 January 2021.
- "2020 UA". Minor Planet Center. International Astronomical Union. Retrieved 19 January 2021.
- "2020 UA". NEO Exchange. Las Cumbres Observatory. 19 October 2020. Retrieved 19 January 2021.
- Gray, Bill (17 October 2020). ""Pseudo-MPEC" for C3K1WP2". Project Pluto. Retrieved 19 January 2021.
- "JPL Small-Body Database Browser: 2020 UA" (2020-10-20 last obs.). Jet Propulsion Laboratory. Retrieved 19 January 2021.
- Bruton, Dan. "Conversion of Absolute Magnitude to Diameter for Minor Planets". Department of Physics, Engineering, and Astronomy. Stephen F. Austin State University. Retrieved 19 January 2021.
External links
- Near-Earth Asteroid 2020 UA extremely close encounter: online observations – 20 Oct. 2020
- 2020 UA at NeoDyS-2, Near Earth Objects—Dynamic Site
- Ephemeris · Obs prediction · Orbital info · MOID · Proper elements · Obs info · Close · Physical info · NEOCC
- 2020 UA at ESA–space situational awareness
- 2020 UA at the JPL Small-Body Database
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