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216911 (2009 KJ4)
Classification: Main-belt Asteroid          SPK-ID: 2216911
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 .2018244212293528 4.4859e-08  
a 2.350324164849469 1.1012e-08 au
q 1.875971350577363 1.0762e-07 au
i 7.824662277112675 3.935e-06 deg
node 38.16974324170488 3.6296e-05 deg
peri 263.9123789666392 3.8652e-05 deg
M 37.29402511056261 1.0317e-05 deg
tp 2459064.158887397081
(2020-Aug-02.65888740)
3.8002e-05 TDB
period 1316.103595456354
3.60
9.2494e-06
2.532e-08
d
yr
n .2735346983648132 1.9224e-09 deg/d
Q 2.824676979121576 1.3234e-08 au
  Orbit Determination Parameters
   # obs. used (total)      257  
   data-arc span      6634 days (18.16 yr)  
   first obs. used      2002-07-16  
   last obs. used      2020-09-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49459  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 23:56:46  

Additional Information
 Earth MOID = .878656 au 
 Jupiter MOID = 2.44681 au 
 T_jup = 3.518 
[ 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 17.11   n/a E2021B55  

216911 (2009 KJ4)          Discovered 2009-May-24 by Lowe, A. at Mayhill
Reference: 20090707/Numbers.arcLast Updated: 2009-07-09

[ show close-approach data ]
Alternate Designations
 2009 KJ4 = 2006 UR157 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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