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Table 1
Optimal initial conditions deduced by fitting the astrometrical measurements of 67P.
| Initial condition | Value and uncertainty (1 σ) |
|
|
|
| x [AU] | 0.5688522425 ± 9.25 × 10-6 |
| y [AU] | 1.0004591393 ± 1.10 × 10-5 |
| z [AU] | 0.4703160954 ± 4.98 × 10-6 |
| vx [AU.day-1] | −0.0174785349 ± 1.16 × 10-7 |
| vy [AU.day-1] | 0.0072390883 ± 9.04 × 10-8 |
| vz [AU.day-1] | 0.0057134963 ± 5.03 × 10-8 |
| A1 | 0.10875 × 10-8 ± 0,00092 × 10-8 |
| A2 | 0.01092 × 10-8 ± 0,00002 × 10-8 |
| A3 | − |
|
|
|
| Time of perhelion | August, 13.08694 2015 TT ± 0.00000 TT |
| a [AU] | 3.4619083 ± 0.0000161 |
| e | 0.6408730 ± 0.0000015 |
| i [deg] | 7.0402569 ± 0.0000161 |
| ω [deg] | 12.7961939 ± 0.0001227 |
| Ω [deg] | 50.1354102 ± 0.0001417 |
| n [deg day-1] | 0.15301385 ± 0.00000107 |
| qh [AU] | 1.2432648 ± 0.0000005 |
Notes. These initial conditions come from the database of IMCCE (notes on comets). The epoch of these elements is August 13, 2015, at 0h, Julian date: 2 457 247.5.
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