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18726 (1998 KC2)
Classification: Mars-crossing Asteroid          SPK-ID: 2018726
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3114113584935979 4.1113e-08  
a 2.36372515557338 1.1005e-08 au
q 1.627634293770783 9.4997e-08 au
i 20.91995891376768 5.9277e-06 deg
node 219.5251178881414 1.1271e-05 deg
peri 290.5983232263764 1.4742e-05 deg
M 72.93679218702057 8.5819e-06 deg
tp 2458731.570743851459
(2019-Sep-05.07074385)
3.0744e-05 TDB
period 1327.3757908797
3.63
9.2699e-06
2.538e-08
d
yr
n .271211816934988 1.8941e-09 deg/d
Q 3.099816017375978 1.4432e-08 au
  Orbit Determination Parameters
   # obs. used (total)      869  
   data-arc span      15177 days (41.55 yr)  
   first obs. used      1978-11-28  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49165  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 18:25:13  

Additional Information
 Earth MOID = .743614 au 
 Jupiter MOID = 2.24778 au 
 T_jup = 3.398 
[ 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 15.1   n/a MPO416909  

18726 (1998 KC2)          Discovered 1998-May-22 by LINEAR at Socorro
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 KC2 = 1978 WT20 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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