2017 BS5

2017 BS5
July 23, 2017 flyby of Earth
Discovery[1][2]
Discovered byATLAS (T05)
Discovery siteHaleakala Obs.
Discovery date25 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)
Aphelion1.0231 AU
Perihelion1.0078 AU
1.0154 AU
Eccentricity0.0075
1.02 yr (374 days)
204.63°
0° 57m 47.52s / day
Inclination11.232°
120.84°
15.577°
Earth MOID0.0070 AU · 2.7 LD
Physical characteristics
Dimensions40–90 meters
24.1[1]

In the astronomy of the Solar System, 2017 BS5 is a sub-kilometer asteroid, classified as near-Earth object that belongs to the Apollo group. It measures approximately 40–90 meters.[3] During a close approach to Earth, it was first observed 25 January 2017, by the ATLAS survey at Haleakala Observatory, Hawaii, United States.[2]

Orbit

2017 BS5 has a low-eccentricity orbit with a semi-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 an inclination of 11° with respect to the ecliptic.[1] It has an Earth minimum orbital intersection distance of 0.007 AU (1,050,000 km), which corresponds to 2.7 lunar distances.[1] The body is too small to be classified as a potentially hazardous asteroid.

July 2017 flyby

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 a synodic 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.

References

  1. ^ a b c d e f "JPL Small-Body Database Browser: (2017 BS5)" (2017-07-23 last obs.). Jet Propulsion Laboratory. Retrieved 2 August 2017.
  2. ^ a b "2017 BS5". Minor Planet Center. Retrieved 2 August 2017.
  3. ^ "Five Known Asteroids Will Give Earth A Close Shave in The Coming Year". IFLScience. Retrieved 13 February 2020.
  4. ^ "Five asteroids will cruise by Earth in the next year, and one is coming very close".

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