(99942) Apophis
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OBSERVATIONAL INFORMATION
Arc information
| Arc length |
6157 |
days |
| Unobserved |
3 |
days |
Astrometry summary
Optical
| RMS of residuals |
0.286964" |
| First observation |
2004-03-15.10789 |
| Last observation |
2021-01-22.061800 |
| Number (Discarded) |
4791 (4) |
|
Radar
| First observation |
2005-01-27 |
| Last observation |
2013-03-15 |
| Delay (Discarded) |
17 (0) |
| Doppler (Discarded) |
29 (0) |
| Total (Discarded) |
46 (0) |
|
Note. The ASCII file is in a format suitable for OrbFit input.