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NEODyS ∴ Objects ∴ 2009HL21 ∴ Observational info
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2009HL21
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OBSERVATIONAL INFORMATION
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Summary
Ephemerides
Obs prediction
Orbital info
MOID
Proper elements
Observational info
Close approaches
Physical info
Arc information
Arc length
5496
days
Unobserved
41
days
Astrometry summary
Optical
RMS of residuals
0.326142
First observation
2009-04-20.92262
Last observation
2024-05-08.248998
Number (Discarded)
138 (1)
Get the observational details
Optical observations
(ASCII file)
Note.
The ASCII file is in a format suitable for
OrbFit
input.