astro.wikisort.org - Asteroid

2020 JJ is a tiny near-Earth asteroid of the Apollo group that passed 7,000 kilometres (4,300 mi) from the surface of Earth on 4 May 2020. It is estimated to be between 3 and 6 meters in diameter.[3]

2020 JJ

Orbit of 2020 JJ
Discovery [1]
Discovered by	Mt. Lemmon Survey
Discovery site	Mt. Lemmon Obs.
Discovery date	4 May 2020
Designations
MPC designation	2020 JJ
Minor planet category	Apollo · NEO
Orbital characteristics [2]
Epoch 31 May 2020 (JD 2459000.5)
Uncertainty parameter 7
Observation arc	0 day
Aphelion	2.1425 AU
Perihelion	0.8708 AU
Semi-major axis	1.5067 AU
Eccentricity	0.4220
Orbital period (sidereal)	1.85 yr (675 d)
Mean anomaly	350.73°
Mean motion	0° 31m 58.44s / day
Inclination	11.192°
Longitude of ascending node	44.188°
Argument of perihelion	237.33°
Earth MOID	3.51662×10−6 AU (526 km)[2]
Physical characteristics
Mean diameter	2.7–6 m[3]
Absolute magnitude (H)	29.97±0.09[2] · 30.0[1]

Orbit and classification

2020 JJ orbits the Sun at a distance of 0.9–2.1 AU once every 1 years and 10 months (675 days; semi-major axis of 1.51 AU). Its orbit has an eccentricity of 0.42 and an inclination of 11° with respect to the ecliptic.[2]

Flyby

On 4 May 2020, it passed 7,000 km above the southern Pacific Ocean.[4] It was the closest since 2019 UN13 on 31 October 2019.[3]

2020 JJ flyby with 1 minute markers, flying left to right. Red shows Earth's shadow.

See also

• List of asteroid close approaches to Earth in 2020

References

External links

• 2020 JJ at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 2020 JJ at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

На других языках

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[ru] 2020 JJ

2020 JJ — околоземный астероид из группы аполлонов. Впервые астероид был замечен обсерваторией Mt. Lemmon Survey (Аризона) за несколько часов до его сближения с Землёй.

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