(99942) Apophis
▹
OBSERVATIONAL INFORMATION
Arc information
Arc length |
6276 |
days |
Unobserved |
922 |
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.