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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1491025686262283 6.3761e-08  
a 3.104975802028552 2.3276e-08 au
q 2.642015934423811 1.9622e-07 au
i 18.30309962604078 6.6951e-06 deg
node 79.63190757812343 1.5686e-05 deg
peri 138.0050436882437 2.6067e-05 deg
M 117.7797383879787 1.8345e-05 deg
tp 2458546.686563740125
(2019-Mar-04.18656374)
0.00010078 TDB
period 1998.415349490864
5.47
2.2471e-05
6.152e-08
d
yr
n .1801427316357018 2.0256e-09 deg/d
Q 3.567935669633292 2.6746e-08 au
  Orbit Determination Parameters
   # obs. used (total)      832  
   data-arc span      8560 days (23.44 yr)  
   first obs. used      1997-04-09  
   last obs. used      2020-09-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50556  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 16:56:20  

Additional Information
 Earth MOID = 1.658 au 
 Jupiter MOID = 1.55349 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 14.26   n/a E2021B55  
rotation period rot_per 4.642 h n/a LCDB (Rev. 2020-October); 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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