2020 SL1
2020 SL1 is a near-Earth asteroid of the Apollo group, discovered by the Pan-STARRS 1 survey at Haleakala Observatory, Hawaii on 18 September 2020. With an estimated diameter of 0.9–2.0 km (0.56–1.24 mi), it is the largest potentially hazardous asteroid discovered in 2020.
| Discovery | |
|---|---|
| Discovered by | Pan-STARRS 1 |
| Discovery site | Haleakala Obs. |
| Discovery date | 18 September 2020 |
| Designations | |
MPC designation | 2020 SL1 |
Alternative designations | P116Atg |
Minor planet category | NEO · Apollo · PHA |
| Orbital characteristics | |
| Epoch 31 May 2020 (JD 2459000.5) | |
| Uncertainty parameter 1 | |
| Observation arc | 12.04 yr (4,396 days) |
| Earliest precovery date | 25 October 2008 |
| Aphelion | 4.121 AU |
| Perihelion | 0.9091 AU |
Semi-major axis | 2.515 AU |
| Eccentricity | 0.63856 |
Orbital period (sidereal) | 3.99 yr |
Mean anomaly | 34.497° |
Mean motion | 0° 14m 49.48s / day |
| Inclination | 13.764° |
Longitude of ascending node | 275.182° |
| 12 January 2020 09:09 UT | |
| 331.910° | |
| Earth MOID | 0.04732 AU |
| TJupiter | 3.108 |
| Physical characteristics | |
Mean diameter | 0.9–2.0 km (assumed albedo 0.05–0.25) |
| 23.6 (current) 22.3 (at discovery) | |
| 17.353±0.567 17.1 | |
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