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43810 (1991 RJ20)
Classification: Main-belt Asteroid          SPK-ID: 2043810
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2288611857541548 3.6168e-08  
a 2.410130603294959 6.8633e-09 au
q 1.858545255602499 8.9217e-08 au
i 3.054512616696082 4.0376e-06 deg
node 131.7081334369398 6.3326e-05 deg
peri 229.4196860286004 6.3803e-05 deg
M 342.4513131370396 8.4437e-06 deg
tp 2459463.119507328488
(2021-Sep-05.61950733)
3.2209e-05 TDB
period 1366.656253287886
3.74
5.8377e-06
1.598e-08
d
yr
n .2634166412614116 1.1252e-09 deg/d
Q 2.961715950987421 8.434e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1122  
   data-arc span      10921 days (29.90 yr)  
   first obs. used      1991-09-14  
   last obs. used      2021-08-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51399  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 00:47:10  

Additional Information
 Earth MOID = .856371 au 
 Jupiter MOID = 2.49444 au 
 T_jup = 3.482 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.52   n/a MPO636691  

43810 (1991 RJ20)          Discovered 1991-Sep-14 by Holt, H. E. at Palomar
Reference: 20020822/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1991 RJ20 = 1995 XZ4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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