 July 23, 2017 flyby of Earth | |
| Discovery[1][2] | |
|---|---|
| Discovered by | ATLAS (T05) |
| Discovery site | Haleakala Obs. |
| Discovery date | 25 January 2017 |
| Designations | |
| 2017 BS5 | |
| Apollo · NEO[1] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 1 | |
| Observation arc | (190 days) |
| Aphelion | 1.0231AU |
| Perihelion | 1.0078 AU |
| 1.0154 AU | |
| Eccentricity | 0.0075 |
| 1.02yr (374 days) | |
| 204.63° | |
| 0° 57m 47.52s / day | |
| Inclination | 11.232° |
| 120.84° | |
| 15.577° | |
| Earth MOID | 0.0070 AU · 2.7LD |
| Physical characteristics | |
| Dimensions | 40–90 meters |
| 24.1[1] | |
In the astronomy of theSolar System,2017 BS5 is a sub-kilometerasteroid, classified asnear-Earth object that belongs to theApollo group. It measures approximately 40–90 meters.[3] During a close approach to Earth, it was first observed 25 January 2017, by theATLAS survey atHaleakala Observatory, Hawaii, United States.[2]
2017 BS5 has a low-eccentricity orbit with asemi-major axis only slightly larger than that of Earth. It orbits the Sun at a distance of 1.008–1.023 AU once every 1.02 years (374 days). Its orbit has an eccentricity of 0.01 and aninclination of 11° with respect to theecliptic.[1] It has an Earthminimum orbital intersection distance of 0.007 AU (1,050,000 km), which corresponds to 2.7lunar distances.[1] The body is too small to be classified as apotentially hazardous asteroid.
On 23 July 2017, it passed by within 3.15 lunar distances.[4] Seen from the Earth it passed straight north to south from Draco south into Scorpio. With its 1.023 year orbit it has asynodic period of 43 years with the earth, so it will flyby the Earth every 43 years or so. JPL Small-Body Database's simulator show the previous flyby in July 1973 and next one will be in July 2061.
2017 in space | ||
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Space probe launches |
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| Impact events | ||
| SelectedNEOs | ||
| Exoplanets | ||
| Discoveries | ||
| Comets | ||
| Space exploration |
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