astro.wikisort.org - Asteroid

2005 ED₂₂₄ is the soonest virtual impactor of an asteroid larger than 50 meters in diameter with a better than 1:1-million chance of impacting Earth. On 11 March 2023 it has a 1-in-500,000 chance of impact.[2] It is estimated to be 54-meters in diameter and has a short observation arc of 3-days. On 11 March 2023 it is nominally expected to be 2.7 AU (400 million km) from Earth but has an uncertainty region billions of kilometers long.[5] Since it has not been observed since 2005 and has an orbital period of 2.6±0.3 years,[3] we do not know where on its orbit 2005 ED₂₂₄ is. Between 2005 and 2023 it could orbit the Sun 6.2 to 7.8 times.

2005 ED₂₂₄

Discovery[1]
Discovered by	LINEAR (704) 1.0-m Reflector
Discovery site	Lincoln Lab's ETS
Discovery date	13 March 2005
Designations
MPC designation	2005 ED224
Minor planet category	NEO Apollo risk listed[2]
Orbital characteristics[3]
Epoch 16 March 2005 (JD 2453445.5)
Uncertainty parameter 9
Observation arc	3.1 days[2]
Aphelion	3.17±0.26 AU (Q)
Perihelion	0.649±0.003 AU (q)
Semi-major axis	1.91±0.16 AU (a)
Eccentricity	0.66±0.03 (e)
Orbital period (sidereal)	2.6±0.3 years
Mean anomaly	20°±3° (M)
Inclination	31.9°±1.1° (i)
Longitude of ascending node	170.53°±0.06° (Ω)
Argument of perihelion	277.3°±0.9° (ω)
Earth MOID	0.0013 AU (190,000 km) ?
Jupiter MOID	2.9 AU (430,000,000 km) ?
Physical characteristics
Dimensions	~54 m (180 ft)?[2] 40–90 meters
Absolute magnitude (H)	23.99 (JPL)[3] 24.3 (MPC)[4]

It was first observed on 13 March 2005 when the asteroid was estimated to be 0.056 ± 0.006 AU (8.38 ± 0.90 million km) from Earth and had a solar elongation of 137 degrees.

Virtual impactors (past and future)[2]

Date	Impact probability (1 in)	JPL Horizons nominal geocentric distance (AU)	NEODyS nominal geocentric distance (AU)	MPC[6] nominal geocentric distance (AU)	Find_Orb nominal geocentric distance (AU)	uncertainty[7] region (3-sigma)
2018-03-11	2.4 million	1.7 AU (250 million km)	1.7 AU (250 million km)	1.4 AU (210 million km)	1.2 AU (180 million km)	± 5 billion km
2023-03-11	500 thousand	2.7 AU (400 million km)[5]	2.7 AU (400 million km)[8]	0.95 AU (142 million km)	4.0 AU (600 million km)[9]	± 3 billion km[5]

The 11 March 2018 virtual impactor did not occur.[2] The line of variation (LOV) for 2018 was billions of kilometers long and wrapped around the asteroid's orbit so that the asteroid could have been numerous different distances from the Earth.

See also

• 2007 FT3
• 2014 MV67

References

External links

• 2005 ED224 at NeoDyS-2, Near Earth Objects—Dynamic Site
  • Ephemeris · Obs prediction · Orbital info · MOID · Proper elements · Obs info · Close · Physical info · NEOCC
• 2005 ED224 at ESA–space situational awareness
  • Ephemerides · Observations · Orbit · Physical Properties · Summary
• 2005 ED224 at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

---