AstDyS-2
Asteroids - Dynamic Site
AstDyS ∴ Objects ∴ 2001SE21 ∴ Observational info
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(222474) 2001SE21  ▹ 
OBSERVATIONAL INFORMATION
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Arc information
Arc length 9186 days
Unobserved 526 days

 

Astrometry summary
Optical
RMS of residuals 0.66
First observation 1997-09-23.642
Last observation 2022-11-17.640
Number (Discarded) 218 (8)

 

Get the observational details
ASCII file

 

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