 Orbit and positions of2018 PD20 | |
| Discovery[1] | |
|---|---|
| Discovered by | ATLAS-MLO |
| Discovery site | Mauna Loa Obs. (first observed only) |
| Discovery date | 11 August 2018 |
| Designations | |
| 2018 PD20 | |
| A107ZJi[2][3] | |
| NEO · Apollo[1][4] | |
| Orbital characteristics[4] | |
| Epoch 23 March 2018 (JD 2458200.5) | |
| Uncertainty parameter 7[4] · 6[1] | |
| Observation arc | 1 day |
| Aphelion | 1.6604AU |
| Perihelion | 0.8163 AU |
| 1.2383 AU | |
| Eccentricity | 0.3408 |
| 1.38yr (503 d) | |
| 300.72° | |
| 0° 42m 54.72s / day | |
| Inclination | 9.4808° |
| 317.68° | |
| 283.56° | |
| Earth MOID | 0.000182 AU (0.0708 LD) 27191 km |
| Physical characteristics | |
| 9 m(est. at0.24)[5] 20 m(est. at0.05)[5] | |
| 27.38[4] 27.4[1] | |
2018 PD20 is a smallasteroid, classified as anear-Earth object of theApollo group, approximately 9–20 meters (30–66 feet) in diameter. On 11 August 2018, it was first observed byATLAS at theMauna Loa Observatory on Hawaii (T08),[1] when it passed 33,500 kilometers (20,800 miles) from the Earth.[4] This is notable because it came within a tenth of the lunar distance, or 0.10 LD which is closer toEarth than satellites in ageostationary orbit. These have analtitude of 0.11 LD, about 36,000 km (22,000 mi), approximately 3 times the width of theEarth.
2018 PD20 orbits the Sun at a distance of 0.82–1.66 AU once every 17 months (503 days;semi-major axis of 1.24 AU). Its orbit has aneccentricity of 0.34 and aninclination of 9° with respect to theecliptic.[4]
The asteroid has an Earthminimum orbital intersection distance of 0.000181761 AU (27,191 km), which translates into 0.078lunar distances.[4]
2018 in space | ||
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| SelectedNEOs | ||
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| Space exploration |
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