(143649) 2003 QQ47
| Discovery | |
|---|---|
| Discovered by | LINEAR |
| Discovery site | Lincoln Lab's ETS |
| Discovery date | 24 August 2003 |
| Designations | |
| Orbital characteristics | |
| Epoch 13 January 2016 (JD 2457400.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 4285 days (11.73 yr) |
| Aphelion | 1.28834 AU (192.733 Gm) |
| Perihelion | 0.882430 AU (132.0096 Gm) |
| 1.08538 AU (162.371 Gm) | |
| Eccentricity | 0.18699 |
| 1.13 yr (413.02 d) | |
Average orbital speed | 28.34 km/s |
| 264.755° | |
| 0° 52m 17.846s / day | |
| Inclination | 62.1021° |
| 0.997990° | |
| 104.999° | |
| Known satellites | S/2021 (143649) 1 |
| Earth MOID | 0.00253637 AU (379,436 km) |
| Physical characteristics | |
| |
| Mass | 2.0×1012 kg |
| 2.6446±0.0007 h | |
| 17.4 | |
(143649) 2003 QQ47, provisionally designated: 2003 QQ47, is a kilometer-sized asteroid and synchronous binary system, classified as near-Earth object and potentially hazardous asteroid of the Apollo group. It became briefly notable upon its discovery in late August 2003, when media outlets played up a very preliminary report that it had a 1 in 250,000 chance of impacting into Earth on 21 March 2014. The discovery of a companion, approximately 310 meters (1,000 ft) in diameter, was announced in September 2021.