2007 FT3
| Discovery[1] | |
|---|---|
| Discovered by | Mt. Lemmon Survey |
| Discovery date | 20 March 2007 |
| Designations | |
| 2007 FT3 | |
| Orbital characteristics[3] | |
| Epoch 21 March 2007 (JD 2454180.5) | |
| Uncertainty parameter 9 | |
| Observation arc | 1.2 days[4] |
| Aphelion | 1.48±0.02 AU (Q) |
| Perihelion | 0.782±0.007 AU (q) |
| 1.13±0.02 AU (a) | |
| Eccentricity | 0.308±0.006 (e) |
| 1.2±0.03 years | |
| 298°±3° (M) | |
| Inclination | 26.9°±0.43° (i) |
| 9.9°±0.2° (Ω) | |
| 277°±2° (ω) | |
| Earth MOID | 0.01 AU (1,500,000 km) ? |
| Jupiter MOID | 3.83 AU (573,000,000 km) ? |
| Physical characteristics | |
| Dimensions |
|
| 20?[3] | |
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.
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]
| Date | Impact probability (1 in) |
JPL Horizons nominal geocentric distance (AU) |
NEODyS nominal geocentric distance (AU) |
uncertainty region |
|---|---|---|---|---|
| 2013-10-02 | 1.9 billion | 0.94 AU (141 million km) | 1.0 AU (150 million km) | ± 330 million km |
| 2019-10-03 | 11 million | 0.93 AU (139 million km) | 1.1 AU (160 million km) | ± 620 million km |
| 2024-10-02 | 13 million | 1.7 AU (250 million km) | 1.8 AU (270 million km) | ± 500 million km |
References
- ^ "MPEC 2007-F60: 2007 FT3". IAU Minor Planet Center. 21 March 2007. Retrieved 15 August 2019. (K07F03T)
- ^ "2007 FT3". Minor Planet Center. Retrieved 11 January 2020.
- ^ a b c "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.
- ^ a b c d "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)
- ^ a b "2007FT3 Ephemerides for 2019". NEODyS (Near Earth Objects – Dynamic Site). Archived from the original on 15 August 2019. Retrieved 15 August 2019.
- ^ 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.)
External links
- 2007 FT3 at NeoDyS-2, Near Earth Objects—Dynamic Site
- 2007 FT3 at ESA–space situational awareness
- 2007 FT3 at the JPL Small-Body Database
