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(99942) Apophis  ▹ 
IMPACTOR TABLE
Date MJD σ σimp Distance ± Width Stretching IP Exp. En. PS TS
(year-month-day) (RE) (RE/σ) (MT)
2068-04-12.634 76483.634 -1.317 0.000 1.73 ± 0.006 3.85e+5 1.88e-6 1.43e-3 -3.67 0
2068-10-15.324 76669.324 -0.182 0.000 1.48 ± 0.000 5.29e+6 2.39e-7 1.81e-4 -4.57 0
2069-04-13.079 76849.079 4.127 0.000 1.68 ± 0.000 1.67e+5 1.80e-9 1.36e-6 -6.70 0
2069-10-15.604 77034.604 1.993 0.000 1.85 ± 0.000 3.34e+6 6.56e-8 4.97e-5 -5.14 0
2069-10-15.973 77034.973 2.543 0.000 0.46 ± 0.016 9.20e+5 7.23e-8 5.49e-5 -5.09 0
2077-04-13.165 79771.165 4.205 0.000 2.14 ± 0.000 1.03e+6 1.34e-10 1.02e-7 -7.88 0
2078-04-13.442 80136.442 4.125 0.000 1.61 ± 0.000 6.23e+6 4.32e-11 3.27e-8 -8.38 0
2102-04-11.809 88899.809 2.556 0.000 4.22 ± 0.253 1.85e+7 2.96e-9 2.18e-6 -6.68 0
2106-10-16.871 90548.871 2.540 0.000 2.03 ± 0.000 6.53e+5 3.88e-8 2.94e-5 -5.57 0
2116-04-15.650 94017.650 1.989 0.000 2.14 ± 0.000 3.10e+9 3.63e-11 1.44e-8 -8.87 0

 

Based on 4105 optical observations (of which 87 are rejected as outliers) from 2004-03-15.109 to 2013-05-07.150.

Coordinates are given on the Target Plane
Unit is one Earth radius, but impact cross section has radius between 2.15 and 2.15 Earth radii

Coordinates for LOV = KEP scaled= T second= F

OrbFit software version= 4.3, 08/05/2012 Date of computation=20130801 220340.613 CET

ADDITIONAL NOTE

The results contained in this impactor table are based on the Line Of Variations method generalised to the 7-dimensional space of the orbital elements and the Yarkovsky parameter. The Yarkovsky parameter has been estimated from the fit to the astrometry as (5.98 +/- 2.06) 10-15 au/d2, so that no a priori constraint based upon models and physical observations has been used.

The results are qualitatively compatible with the ones obtained at JPL, computed by using a priori information for the Yarkovsky effect computation and a Monte Carlo method, as described in the paper Farnocchia et al. (2013).

 





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