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101804 (1999 JR4)
Classification: Main-belt Asteroid          SPK-ID: 2101804
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08628935437752741 3.3913e-08  
a 2.211755983551631 1.1948e-08 au
q 2.020904987690328 7.3968e-08 au
i 8.578499511837745 3.9004e-06 deg
node 46.5444935919031 3.3411e-05 deg
peri 201.9205844491622 4.9728e-05 deg
M 187.1132971223475 4.0204e-05 deg
tp 2459777.483420990232
(2022-Jul-16.98342099)
0.00013689 TDB
period 1201.445964895735
3.29
9.735e-06
2.665e-08
d
yr
n .299638943838179 2.4279e-09 deg/d
Q 2.402606979412935 1.2978e-08 au
  Orbit Determination Parameters
   # obs. used (total)      552  
   data-arc span      7949 days (21.76 yr)  
   first obs. used      1999-05-10  
   last obs. used      2021-02-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .62111  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:38:42  

Additional Information
 Earth MOID = 1.00879 au 
 Jupiter MOID = 2.60266 au 
 T_jup = 3.637 
[ 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 16.4   n/a MPO337994  

101804 (1999 JR4)          Discovered 1999-May-10 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 1999 JR4 = 2002 FL33 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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