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120837 (1998 KE9)
Classification: Main-belt Asteroid          SPK-ID: 2120837
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1794222215269628 3.5135e-08  
a 2.579912848291471 1.1178e-08 au
q 2.117019153705062 8.7988e-08 au
i 13.04366929222551 4.1705e-06 deg
node 169.3931929686672 1.5992e-05 deg
peri 99.11486691665348 2.0111e-05 deg
M 134.6373717913542 1.4216e-05 deg
tp 2458634.431348662989
(2019-May-30.93134866)
5.7736e-05 TDB
period 1513.582089207197
4.14
9.8373e-06
2.693e-08
d
yr
n .2378463662902917 1.5458e-09 deg/d
Q 3.042806542877881 1.3184e-08 au
  Orbit Determination Parameters
   # obs. used (total)      809  
   data-arc span      8299 days (22.72 yr)  
   first obs. used      1998-04-24  
   last obs. used      2021-01-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5647  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 09:26:01  

Additional Information
 Earth MOID = 1.14662 au 
 Jupiter MOID = 2.19855 au 
 T_jup = 3.367 
[ 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 15.43   n/a E2021B55  

120837 (1998 KE9)          Discovered 1998-May-27 by LONEOS at Anderson Mesa
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

[ show close-approach data ]
Alternate Designations
 1998 KE9 = 2002 FG11 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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