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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3113874697813284 3.7162e-08  
a 2.364631589052608 1.0871e-08 au
q 1.628314941572515 8.4815e-08 au
i 20.9115008436995 4.9495e-06 deg
node 219.4726700350398 1.0409e-05 deg
peri 290.7240984753831 1.298e-05 deg
M 127.0616157900063 8.3616e-06 deg
tp 2458731.734619555322
(2019-Sep-05.23461956)
2.8954e-05 TDB
period 1328.139390569256
3.64
9.1589e-06
2.508e-08
d
yr
n .2710558865705351 1.8692e-09 deg/d
Q 3.100948236532702 1.4256e-08 au
  Orbit Determination Parameters
   # obs. used (total)      949  
   data-arc span      15239 days (41.72 yr)  
   first obs. used      1978-11-28  
   last obs. used      2020-08-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48228  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:35:55  

Additional Information
 Earth MOID = .743561 au 
 Jupiter MOID = 2.24472 au 
 T_jup = 3.397 
[ 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 15.18   n/a E2021B10  

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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