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Table 4
Mass and spin change properties of (1862) Apollo derived by ATPM at the 3-σ confidence level.
| Shape variant | “Original” | “Stretched” | “New” |
|
|
|||
| Measured Yarkovsky | |||
| semimajor axis drifta (m yr-1) | –32.1 ± 3.4 | –32.1 ± 3.4 | –32.1 ± 3.4 |
| Bulk densityb (kg m-3) | 2400  |
2820  |
2850  |
| Macro-porosityb (%) | 28 ± 14 | 15  |
14  |
| Massb (1012 kg) | 6.06  |
5.49  |
5.68  |
| Moment of inertiab (1018 kg m2) | 2.91  |
1.98  |
2.17  |
| Measured YORP | |||
| rotational accelerationc (10-3 rad yr-2) | 7.3 ± 1.6 | 7.3 ± 1.6 | 7.3 ± 1.6 |
| Predicted YORP | |||
| rotational accelerationb (10-3 rad yr-2) | 6.8  |
6.8  |
6.1  |
| YORP obliquity shiftb (°/105 yr) | 2.4  |
1.7  |
1.5 |
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