2007 FT3

2007 FT3 (also written 2007 FT3) is a lost asteroid with a short observation arc of 1.2 days. It has a poorly constrained orbit and has not been seen since 2007. It was first observed on 20 March 2007 when the asteroid was estimated to be 0.19±0.01 AU from Earth and had a solar elongation of 107 degrees.

2007 FT3
Discovery[1]
Discovered byMt. Lemmon Survey
Discovery date20 March 2007
Designations
2007 FT3
Orbital characteristics[3]
Epoch 21 March 2007 (JD 2454180.5)
Uncertainty parameter 9
Observation arc1.2 days[4]
Aphelion1.48±0.02 AU (Q)
Perihelion0.782±0.007 AU (q)
1.13±0.02 AU (a)
Eccentricity0.308±0.006 (e)
1.2±0.03 years
298°±3° (M)
Inclination26.9°±0.43° (i)
9.9°±0.2° (Ω)
277°±2° (ω)
Earth MOID0.01 AU (1,500,000 km) ?
Jupiter MOID3.83 AU (573,000,000 km) ?
Physical characteristics
Dimensions
  • ~340 m (1,100 ft)?[4]
  • 270–590 meters
20?[3]

    2013 virtual impactor

    The 2 October 2013 virtual impactor did not occur.[4] The uncertainty region of ± 330 million kilometers wrapped around a large portion of the asteroid's orbit so that the asteroid could have been numerous different distances from the Earth.

    2019 virtual impactor

    The 3 October 2019 virtual impactor did not occur. The poorly constrained nominal orbit suggested that the closest approach the asteroid would make to Earth in 2019 was in late March at a distance of 0.28 AU (42,000,000 km; 26,000,000 mi).[5] But the line of variation (LOV) for this asteroid is hundreds of millions of kilometers long.

    With a short 1.2 day observation arc, the Sentry Risk Table showed an estimated 1 in 11 million chance of the asteroid impacting Earth on 3 October 2019.[4] The nominal JPL Horizons 3 October 2019 Earth distance was 0.93 AU (139,000,000 km; 86,000,000 mi) with a 3-sigma uncertainty of ± 620 million km.[6] NEODyS listed the nominal 3 October 2019 Earth distance as 1.1 AU (160,000,000 km; 100,000,000 mi).[5]

    Virtual impactors (past and future)
    Date Impact
    probability
    (1 in)    		 JPL Horizons
    nominal geocentric
    distance (AU)    		 NEODyS
    nominal geocentric
    distance (AU)    		 uncertainty
    region
    2013-10-021.9 billion0.94 AU (141 million km)1.0 AU (150 million km)± 330 million km
    2019-10-0311 million0.93 AU (139 million km)1.1 AU (160 million km)± 620 million km
    2024-10-0213 million1.7 AU (250 million km)1.8 AU (270 million km)± 500 million km

    References
    1. "MPEC 2007-F60: 2007 FT3". IAU Minor Planet Center. 21 March 2007. Retrieved 15 August 2019. (K07F03T)
    2. "2007 FT3". Minor Planet Center. Retrieved 11 January 2020.
    3. "JPL Small-Body Database Browser: (2007 FT3)" (last observation: 2007-03-21; arc: 1 day). Jet Propulsion Laboratory. Archived from the original on 15 August 2019. Retrieved 15 August 2019.
    4. "Earth Impact Risk Summary: 2007 FT3". NASA/JPL Near-Earth Object Program Office. Archived from the original on 30 December 2018. Retrieved 15 August 2019. (Wayback Machine 2012)
    5. "2007FT3 Ephemerides for 2019". NEODyS (Near Earth Objects – Dynamic Site). Archived from the original on 15 August 2019. Retrieved 15 August 2019.
    6. Go to JPL Horizons. Table Settings: only need "20. Observer range & range-rate" AND "39. Range & range-rate 3-sigmas".
      RNG_3sigma = uncertainty range in km. (Soln.date: 6 April 2017 generates RNG_3sigma = 620915473 for 3 October 2019.)
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