Astronomy:2016 EU85

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2016 EU85
Discovery[1][2]
Discovered byPan-STARRS
Discovery siteHaleakala Obs.
Discovery date10 March 2016
(discovery: first observation only)
Designations
2016 EU85
Minor planet category
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 3
Observation arc1.42 yr (518 days)
|{{{apsis}}}|helion}}2.7400 AU
|{{{apsis}}}|helion}}0.9561 AU
1.8480 AU
Eccentricity0.4826
Orbital period2.51 yr (918 days)
Mean anomaly303.30°
Mean motion0° 23m 32.28s / day
Inclination2.5966°
Longitude of ascending node359.44°
23.527°
Earth MOID0.0065 AU (2.5 LD)
Physical characteristics
Dimensions0.4 km (est. at 0.24)[3]
Absolute magnitude (H)19.2[1]


2016 EU85 is an asteroid, classified as near-Earth object and potentially hazardous asteroid of the Apollo group, approximately 400 meters in diameter. It was first observed on 10 March 2016, by the Pan-STARRS survey at Haleakala Observatory, Hawaii, United States.[1][2]

Orbit

2016 EU85 orbits the Sun at a distance of 1.0–2.7 AU once every 2 years and 6 months (918 days). Its orbit has an eccentricity of 0.48 and an inclination of 3° with respect to the ecliptic.[1] It has an Earth minimum orbital intersection distance of 0.0065 AU (972,000 km) which translates into 2.5 lunar distances.[1]

Torino scale

It is currently rated at level 0[4] after being rated at level 1 on the Torino Scale by the NEODyS system.[5] It was upgraded to level 1 on 25 March 2016 but downgraded on 30 March 2016. On the Sentry system it did not cross the threshold between the two levels, due to a lower computed impact probability. The asteroid is estimated to have a diameter of 440 metres (1,440 ft; 480 yd).[6] The observation arc was then increased to of 78 days.[7]

When rated at Torino Scale level 1, there was a 0.0012% chance or a 1 in 83,000 chance of the asteroid colliding with the Earth, corresponding to a 99.9988% chance the asteroid will miss the Earth.[8] 2016 EU85 had been observed 14 times[9] at the observatories Mauna Kea (568), Apache Point (705), Pan-STARRS 1 Haleakala (F51) and Magdalena Ridge Observatory (H01).[10]

2016 EU85 was subsequently removed from the list of possible impactors thanks to prediscovery observations found in the Pan-STARRS archive.

Observations

2016 EU85 was observed with the Spacewatch 1.8-meter telescopes and also the Vatican Advanced Technology Telescope.[11][12]

See also

  • List of asteroid close approaches to Earth in 2016

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 "JPL Small-Body Database Browser: (2016 EU85)". Jet Propulsion Laboratory. http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=3746452. Retrieved 2 August 2017. 
  2. ↑ 2.0 2.1 "2016 EU85". Minor Planet Center. http://www.minorplanetcenter.net/db_search/show_object?object_id=2016+EU85. Retrieved 2 August 2017. 
  3. ↑ "Asteroid Size Estimator". CNEOS/JPL. https://cneos.jpl.nasa.gov/tools/ast_size_est.html. 
  4. ↑ "CRT Page". http://www.hohmanntransfer.com/crt.htm. 
  5. ↑ "NEODyS". https://newton.spacedys.com/neodys/index.php?pc=1.1.0&n=2016EU85. 
  6. ↑ "2016-03-15 Tracking News". http://www.hohmanntransfer.com/mn/16/16075_0315.htm. 
  7. ↑ http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2016+EU85 [|permanent dead link|dead link}}]
  8. ↑ "Risky Asteroid 2016 EU85 – Astrometrics". https://thespaceport.us/forum/topic/44024-risky-asteroid-2016-eu85/. 
  9. ↑ Network, Las Cumbres Observatory Global Telescope. "2016 EU85 details | LCOGT NEOx". http://lcogt.net/neoexchange/target/5955/. 
  10. ↑ "MPEC 2016-E142: 2016 EU85". http://www.minorplanetcenter.org/mpec/K16/K16EE2.html. 
  11. ↑ "2016-03-31 Tracking News". http://www.hohmanntransfer.com/mn/16/16091_0331.htm. 
  12. ↑ "2016-04-08 Tracking News". http://www.hohmanntransfer.com/mn/16/16099_0408.htm. 

External links



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