2016 WF9
2016 WF9 is a dark, sub-kilometer asteroid and suspected extinct comet, classified as near-Earth object and potentially hazardous asteroid of the Apollo group.
Artist's rendition of 2016 WF9 | |
| Discovery | |
|---|---|
| Discovered by | NEOWISE |
| Discovery site | Earth orbit |
| Discovery date | 27 November 2016 (discovery: first observed) |
| Designations | |
MPC designation | 2016 WF9 |
Minor planet category | NEO · PHA · Apollo |
| Orbital characteristics | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 4 | |
| Observation arc | (192 days) |
| Aphelion | 4.7614 AU |
| Perihelion | 0.9816 AU |
Semi-major axis | 2.8715 AU |
| Eccentricity | 0.6582 |
Orbital period (sidereal) | 4.87 yr (1,777 days) |
Mean anomaly | 43.511° |
Mean motion | 0° 12m 9.36s / day |
| Inclination | 14.995° |
Longitude of ascending node | 125.41° |
| 342.45° | |
| Earth MOID | 0.0156 AU (6.1 LD) |
| Jupiter MOID | 0.5211 AU |
| TJupiter | 2.893 (comet-like) |
| Physical characteristics | |
Mean diameter | 0.5–1.0 km |
| <0.05 (dark) | |
| 20.2 | |
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