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118239 (1997 KX)
Classification: Main-belt Asteroid          SPK-ID: 2118239
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 .1488930104358366 6.4083e-08  
a 3.107230374035507 2.3574e-08 au
q 2.64458548952769 1.9808e-07 au
i 18.30503687389689 6.7016e-06 deg
node 79.65150547154238 1.5774e-05 deg
peri 138.2627053900966 2.6036e-05 deg
M 81.48952145792339 1.8259e-05 deg
tp 2458547.646348501581
(2019-Mar-05.14634850)
0.00010087 TDB
period 2000.592366021059
5.48
2.2767e-05
6.233e-08
d
yr
n .1799467028438169 2.0478e-09 deg/d
Q 3.569875258543325 2.7084e-08 au
  Orbit Determination Parameters
   # obs. used (total)      822  
   data-arc span      8560 days (23.44 yr)  
   first obs. used      1997-04-09  
   last obs. used      2020-09-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5083  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 18:12:56  

Additional Information
 Earth MOID = 1.66143 au 
 Jupiter MOID = 1.55191 au 
 T_jup = 3.126 
[ 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 14.3   n/a MPO475038  
rotation period rot_per 4.642 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

118239 (1997 KX)          Discovered 1997-May-31 by BAO Schmidt CCD Asteroid Program at Xinglong
Reference: 20051116/Numbers.arcLast Updated: 2005-11-21

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