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Asteroids - Dynamic Site
AstDyS ∴ Objects ∴ 2001AY9 ∴ Observational info
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(72221) 2001AY9  ▹ 
OBSERVATIONAL INFORMATION
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Arc information
Arc length 9029.83 days
Unobserved 74 days

 

Astrometry summary
Optical
RMS of residuals 0.45
First observation 1999-06-15.308
Last observation 2024-03-05.136
Number (Discarded) 1474 (9)

 

Get the observational details
ASCII file

 

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