Astronomy:2020 JJ
From HandWiki
 Orbit of 2020 JJ | |
| Discovery [1] | |
|---|---|
| Discovered by | Mt. Lemmon Survey |
| Discovery site | Mt. Lemmon Obs. |
| Discovery date | 4 May 2020 |
| Designations | |
| 2020 JJ | |
| Minor planet category | Apollo · NEO |
| Orbital characteristics [2] | |
| Epoch 31 May 2020 (JD 2459000.5) | |
| Uncertainty parameter 7 | |
| Observation arc | 0 day |
| |{{{apsis}}}|helion}} | 2.1425 AU |
| |{{{apsis}}}|helion}} | 0.8708 AU |
| 1.5067 AU | |
| Eccentricity | 0.4220 |
| Orbital period | 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° |
| 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] |
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]
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
- ↑ 1.0 1.1 "2020 JJ". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=2020+JJ. Retrieved 5 May 2020.
- ↑ 2.0 2.1 2.2 2.3 "JPL Small-Body Database Browser: (2020 JJ)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=54016959;cad=1. Retrieved 5 May 2020.
- ↑ 3.0 3.1 3.2 Asteroid 2020 JJ flew past Earth at just 0.03 LD on May 4 -- the closest of the year and 6th closest on record 4 May 2020
- ↑ @tony873004 (4 May 2020). "A few hours ago, newly-discovered asteroid C2QQFV2 passed only 7000 km above the South Pacific Ocean. It was in Ear…". https://twitter.com/tony873004/status/1257423820627083264.
External links
- 2020 JJ at AstDyS-2, Asteroids—Dynamic Site
- 2020 JJ at the JPL Small-Body Database
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