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AstDyS ∴ Objects ∴ 1998HE121 ∴ Observational info
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(18715) 1998HE121  ▹ 
OBSERVATIONAL INFORMATION
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Arc information
Arc length 19849.6 days
Unobserved 47 days

 

Astrometry summary
Optical
RMS of residuals 0.39
First observation 1969-11-15.942
Last observation 2024-03-21.582
Number (Discarded) 3408 (24)

 

Get the observational details
ASCII file

 

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