(21987) 1999XH18
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OBSERVATIONAL INFORMATION
Arc information
Arc length |
15466.1 |
days |
Unobserved |
340 |
days |
Astrometry summary
Optical
RMS of residuals |
0.50 |
First observation |
1981-03-07.666 |
Last observation |
2023-07-11.808 |
Number (Discarded) |
1490 (6) |
|
Note: The ASCII file is in a format suitable for OrbFit input.