(99942) Apophis
▹
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.