(99942) Apophis
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OBSERVATIONAL INFORMATION
Arc information
| Arc length |
6244 |
days |
| Unobserved |
275 |
days |
Astrometry summary
Optical
| RMS of residuals |
0.307426" |
| First observation |
2004-03-15.10789 |
| Last observation |
2021-04-18.889735 |
| Number (Discarded) |
7845 (14) |
|
Radar
| First observation |
2005-01-27 |
| Last observation |
2021-03-11 |
| Delay (Discarded) |
20 (0) |
| Doppler (Discarded) |
30 (0) |
| Total (Discarded) |
50 (0) |
|
Note. The ASCII file is in a format suitable for OrbFit input.