Astronomy:2016 AZ8
 Radar images of 2016 AZ8 and its satellite by the Arecibo Observatory in January 2019 | |
| Discovery[1] | |
|---|---|
| Discovered by | WISE |
| Discovery site | Earth orbit |
| Discovery date | 3 January 2016 |
| Designations | |
| 2016 AZ8 | |
| Minor planet category | NEO · Apollo[1][2] PHA[1][2] |
| Orbital characteristics[2] | |
| Epoch 27 April 2019 (JD 2458600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 3.69 yr (1,347 d) |
| |{{{apsis}}}|helion}} | 1.7895 AU |
| |{{{apsis}}}|helion}} | 0.8516 AU |
| 1.3205 AU | |
| Eccentricity | 0.3551 |
| Orbital period | 1.52 yr (554 d) |
| Mean anomaly | 99.623° |
| Mean motion | 0° 38m 58.2s / day |
| Inclination | 5.5862° |
| Longitude of ascending node | 90.016° |
| 318.51° | |
| Known satellites | 1[3] |
| Earth MOID | 0.0295 AU (11.49 LD) |
| Physical characteristics | |
| Mean diameter | 215±52 m[2] |
| Absolute magnitude (H) | 21.0[2] |
2016 AZ8 is a sub-kilometer asteroid and near-Earth object of the Apollo group, at least 400 meters (1,300 feet) in diameter.[1][3] It was first observed on 3 January 2016, by the WISE telescope with precovery images found back in 2012.
The potentially hazardous asteroid is a binary system with a minor-planet moon in its orbit. The discovery was made by astronomers at Arecibo Observatory on 4 January 2019, while 2016 AZ8 was passing within 4,460,000 kilometers (0.0298 AU) of the Earth.[3] The binary has a secondary-to-primary diameter ratio of at least 0.3.[3]
Orbit and classification
2016 AZ8 orbits the Sun at a distance of 0.85–1.8 AU once every 18 months (554 days; semi-major axis of 1.32 AU). Its orbit has an eccentricity of 0.36 and an inclination of 6° with respect to the ecliptic.[2] The body's observation arc begins with a precovery taken at the Siding Spring Survey in July 2012, more than three years prior to its official discovery observation.[1]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 "2016 AZ8". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=2016+AZ8. Retrieved 7 January 2019.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 "JPL Small-Body Database Browser: (2016 AZ8)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=3739246. Retrieved 7 January 2019.
- ↑ 3.0 3.1 3.2 3.3 "Arecibo Radar". Twitter. 4 Jan 2019. https://twitter.com/AreciboRadar/status/1081303320973770752. Retrieved 7 January 2019.
External links
- MPEC 2016-A161: Daily Orbit Update, K16A08Z, 15 January 2016
- List of the Potentially Hazardous Asteroids (PHAs), Minor Planet Center
- 2016 AZ8 at NeoDyS-2, Near Earth Objects—Dynamic Site
- Ephemeris · Obs prediction · Orbital info · MOID · Proper elements · Obs info · Close · Physical info · NEOCC
- 2016 AZ8 at ESA–space situational awareness
- 2016 AZ8 at the JPL Small-Body Database
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