2018 BD
2018 BD is a small asteroid and near-Earth object of the Apollo group, approximately 2–6 meters (7–20 ft) in diameter. It was first observed on 18 January 2018, by astronomers of the Catalina Sky Survey at Mount Lemmon Observatory, Arizona, United States, just hours before passing about 0.10 lunar distances from the Earth.
Orbit before and after 1/18/2018 flyby | |
| Discovery | |
|---|---|
| Discovered by | CSS |
| Discovery site | Mount Lemmon Obs. |
| Discovery date | 18 January 2018 (first observed only) |
| Designations | |
MPC designation | 2018 BD |
Minor planet category | NEO · Apollo |
| Orbital characteristics | |
| Epoch 23 March 2018 (JD 2458200.5) | |
| Uncertainty parameter 7 | |
| Observation arc | 1 day |
| Aphelion | 1.3555 AU |
| Perihelion | 0.7508 AU |
Semi-major axis | 1.0531 AU |
| Eccentricity | 0.2871 |
Orbital period (sidereal) | 1.08 yr (395 days) |
Mean anomaly | 357.05° |
Mean motion | 0° 54m 43.2s / day |
| Inclination | 2.4082° |
Longitude of ascending node | 298.10° |
| 273.70° | |
| Earth MOID | 6.019×10−6 AU (0.00234 LD) |
| Physical characteristics | |
Mean diameter | 2 m (est. at 0.35) 6 m (est. at 0.05) |
| 30.154 | |
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