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(20975) 1981ER4  ▹ 
OBSERVATIONAL INFORMATION
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Arc information
Arc length 19115.9 days
Unobserved 224 days

 

Astrometry summary
Optical
RMS of residuals 0.45
First observation 1971-05-14.194
Last observation 2023-09-14.101
Number (Discarded) 2350 (6)

 

Get the observational details
ASCII file

 

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