AstDyS-2
Asteroids - Dynamic Site
AstDyS ∴ Objects ∴ 2001DD9 ∴ Observational info
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(252171) 2001DD9  ▹ 
OBSERVATIONAL INFORMATION
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Arc information
Arc length 8248.98 days
Unobserved 219 days

 

Astrometry summary
Optical
RMS of residuals 0.57
First observation 2001-02-17.311
Last observation 2023-09-19.292
Number (Discarded) 312 (1)

 

Get the observational details
ASCII file

 

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