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123739 (2001 AC18)
Classification: Main-belt Asteroid          SPK-ID: 2123739
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3288353470874383 5.4943e-08  
a 3.14046646290335 2.0645e-08 au
q 2.107770083558067 1.7556e-07 au
i 19.72902896311556 6.8729e-06 deg
node 148.4640941762368 1.5466e-05 deg
peri 359.9460733930734 1.7326e-05 deg
M 158.9697106105982 8.0499e-06 deg
tp 2458102.861338172722
(2017-Dec-15.36133817)
4.3711e-05 TDB
period 2032.776665545972
5.57
2.0044e-05
5.488e-08
d
yr
n .1770976645401967 1.7463e-09 deg/d
Q 4.173162842248633 2.7433e-08 au
  Orbit Determination Parameters
   # obs. used (total)      603  
   data-arc span      7600 days (20.81 yr)  
   first obs. used      1999-10-08  
   last obs. used      2020-07-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50713  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 10:21:43  

Additional Information
 Earth MOID = 1.11938 au 
 Jupiter MOID = .842383 au 
 T_jup = 3.038 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.4   n/a MPO396057  

123739 (2001 AC18)          Discovered 2001-Jan-02 by LINEAR at Socorro
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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