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°± (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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