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(99942) Apophis  ▹ 
OBSERVATIONAL INFORMATION
Arc information
Arc length 6244 days
Unobserved 26 days

 

Astrometry summary
Optical
RMS of residuals 0.307426"
First observation 2004-03-15.10789
Last observation 2021-04-18.889735
Number (Discarded) 7845 (14)
Radar
First observation 2005-01-27
Last observation 2021-03-11
Delay (Discarded) 20 (0)
Doppler (Discarded) 30 (0)
Total (Discarded) 50 (0)

 

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

 

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