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(99942) Apophis  ▹ 
OBSERVATIONAL INFORMATION
Arc information
Arc length 5823 days
Unobserved 4 days

 

Astrometry summary
Optical
RMS of residuals 0.275624"
First observation 2004-03-15.10789
Last observation 2020-02-22.81382
Number (Discarded) 4520 (4)
Radar
First observation 2005-01-27
Last observation 2013-03-15
Delay (Discarded) 13 (0)
Doppler (Discarded) 7 (0)
Total (Discarded) 20 (0)

 

Get the observational details
Optical observations (ASCII file)
Radar observations

 

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