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Table 6
Estimations of A2, drift in semi-major axis da/dt, and standard deviations for selected PHAs, without and with their precovery observations.
| Object | A2 |  |
A2 |  |
da/dt | σȧ | da/dt | σȧ |
|---|---|---|---|---|---|---|---|---|
| ×10−15 au day−2 | ×10−15 au day−2 | ×10−4 au Myr−1 | ×10−4 au Myr−1 | |||||
| without precoveries | with precoveries | without precoveries | with precoveries | |||||
| (175706) 1996 FG3 | −11.523 | 2.476 | −11.691 | 2.460 | −5.431 | 1.167 | −5.510 | 1.160 |
| 2003 VE1 | 10.114 | 167.602 | −62.422 | 35.487 | 4.084 | 67.681 | −25.207 | 14.330 |
| (99942) Apophis | −29.063 | 0.268 | −29.063 | 0.268 | −13.338 | 0.123 | −13.338 | 0.123 |
| (292220) 2006 SU49 | −30.488 | 59.931 | −48.548 | 54.363 | −12.069 | 23.725 | −19.218 | 21.520 |
| (341843) 2008 EV5 | 50.863 | 265.197 | 50.863 | 265.197 | 22.217 | 115.839 | 22.217 | 115.839 |
| 2013 NJ10 | – | – | – | – | – | – | – | – |
| 2014 WV363 | −281.307 | 1146.348 | −23.796 | 28.412 | −118.663 | 488.005 | −10.137 | 12.103 |
| 2015 OL35 | – | – | – | – | – | – | – | – |
| 2015 TE323 | −689.799 | 384.626 | −89.207 | 111.805 | −305.795 | 170.509 | −39.546 | 49.564 |
| (506074) Svarog | −96.156 | 158.071 | −13.969 | 20.036 | −61.942 | 101.826 | −8.999 | 12.907 |
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