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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08646607874212252 3.3931e-08  
a 2.211385157262458 1.2325e-08 au
q 2.020175354125441 7.3998e-08 au
i 8.579301925183282 4.0872e-06 deg
node 46.54475876649941 3.755e-05 deg
peri 201.8929924950203 5.4445e-05 deg
M 127.2020807607394 4.1886e-05 deg
tp 2458576.088906640888
(2019-Apr-02.58890664)
0.0001381 TDB
period 1201.143823241908
3.29
1.0041e-05
2.749e-08
d
yr
n .2997143164990465 2.5056e-09 deg/d
Q 2.402594960399474 1.339e-08 au
  Orbit Determination Parameters
   # obs. used (total)      501  
   data-arc span      7841 days (21.47 yr)  
   first obs. used      1999-05-10  
   last obs. used      2020-10-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .62939  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 19:58:24  

Additional Information
 Earth MOID = 1.00954 au 
 Jupiter MOID = 2.60381 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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