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AstDyS ∴ Objects ∴ 2001XD221 ∴ Observational info
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(146772) 2001XD221  ▹ 
OBSERVATIONAL INFORMATION
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Arc information
Arc length 8428.98 days
Unobserved 200 days

 

Astrometry summary
Optical
RMS of residuals 0.53
First observation 2000-09-21.163
Last observation 2023-10-20.146
Number (Discarded) 454 (6)

 

Get the observational details
ASCII file

 

Note: The ASCII file is in a format suitable for OrbFit input.