2017 BS5

2017 BS₅
	July 23, 2017 flyby of Earth
Discovery
Discovered by	ATLAS (T05)
Discovery site	Haleakala Obs.
Discovery date	25 January 2017
Designations
MPC designation	2017 BS5
Minor planet category	Apollo · NEO
Orbital characteristics
	Epoch 4 September 2017 (JD 2458000.5)
	Uncertainty parameter 1
Observation arc	(190 days)
Aphelion	1.0231 AU
Perihelion	1.0078 AU
Semi-major axis	1.0154 AU
Eccentricity	0.0075
Orbital period (sidereal)	1.02 yr (374 days)
Mean anomaly	204.63°
Mean motion	0° 57m 47.52s / day
Inclination	11.232°
Longitude of ascending node	120.84°
Argument of perihelion	15.577°
Earth MOID	0.0070 AU · 2.7 LD
Physical characteristics
Dimensions	40–90 meters
Absolute magnitude (H)	24.1

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

^ ^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.
^ ^a ^b "2017 BS5". Minor Planet Center. Retrieved 2 August 2017.
^ "Five Known Asteroids Will Give Earth A Close Shave in The Coming Year". IFLScience. Retrieved 13 February 2020.
^ "Five asteroids will cruise by Earth in the next year, and one is coming very close".

External links

MPEC 2017-B69 : 2017 BS5
2017 BS5 at NeoDyS-2, Near Earth Objects—Dynamic Site
- Ephemerides · Observation prediction · Orbital info · MOID · Proper elements · Observational info · Close approaches · Physical info · Orbit animation
2017 BS5 at the JPL Small-Body Database
- Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters

[jpldata-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.

[MPC-2017BS5-2] "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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2017 BS5

Orbit

July 2017 flyby

References

External links

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