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118331 (1999 AM2)
Classification: Main-belt Asteroid          SPK-ID: 2118331
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .212961422328961 3.2775e-08  
a 2.320119130335717 7.6821e-09 au
q 1.82602326036679 7.5402e-08 au
i 5.670657095379378 5.1803e-06 deg
node 345.4339339966892 3.7527e-05 deg
peri 52.78935503282057 3.9707e-05 deg
M 74.70915753214672 1.2144e-05 deg
tp 2458732.623144241977
(2019-Sep-06.12314424)
4.3258e-05 TDB
period 1290.814556855268
3.53
6.411e-06
1.755e-08
d
yr
n .2788936629883117 1.3852e-09 deg/d
Q 2.814215000304643 9.3181e-09 au
  Orbit Determination Parameters
   # obs. used (total)      900  
   data-arc span      7694 days (21.07 yr)  
   first obs. used      1999-01-09  
   last obs. used      2020-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53379  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 05:56:56  

Additional Information
 Earth MOID = .839603 au 
 Jupiter MOID = 2.63883 au 
 T_jup = 3.541 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.6   n/a MPO396012  

118331 (1999 AM2)          Discovered 1999-Jan-09 by Kobayashi, T. at Oizumi
Reference: 20051116/Numbers.arcLast Updated: 2005-11-21

Alternate Designations
 1999 AM2 = 2001 QP63 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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