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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 | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2289461888307059 3.8286e-08  
a 2.409583640513597 7.8291e-09 au
q 1.857918649349191 9.5215e-08 au
i 3.054261349226744 4.0856e-06 deg
node 131.7095496459068 6.501e-05 deg
peri 229.514244091828 6.5588e-05 deg
M 290.7461930285087 1.0055e-05 deg
tp 2459463.316475661654
(2021-Sep-05.81647566)
3.9007e-05 TDB
period 1366.191049643578
3.74
6.6584e-06
1.823e-08
d
yr
n .2635063376340516 1.2843e-09 deg/d
Q 2.961248631678003 9.6215e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1055  
   data-arc span      10506 days (28.76 yr)  
   first obs. used      1991-09-14  
   last obs. used      2020-06-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51427  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 09:22:34  

Additional Information
 Earth MOID = .854979 au 
 Jupiter MOID = 2.49455 au 
 T_jup = 3.482 
[ 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 15.51   n/a E2021B10  

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

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