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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .22886118648076 3.8201e-08  
a 2.410130603121541 7.9194e-09 au
q 1.858545253717555 9.5012e-08 au
i 3.054513379973922 4.0852e-06 deg
node 131.7081166255674 6.4793e-05 deg
peri 229.4197026241613 6.5361e-05 deg
M 342.451313437305 1.007e-05 deg
tp 2459463.119506181410
(2021-Sep-05.61950618)
3.8446e-05 TDB
period 1366.656253140382
3.74
6.736e-06
1.844e-08
d
yr
n .2634166412898424 1.2983e-09 deg/d
Q 2.961715952525526 9.7319e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1072  
   data-arc span      10889 days (29.81 yr)  
   first obs. used      1991-09-14  
   last obs. used      2021-07-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51921  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 14:19:53  

Additional Information
 Earth MOID = .856371 au 
 Jupiter MOID = 2.49444 au 
 T_jup = 3.482 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456999.5 (2014-Dec-08.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2271701287871263 3.8038e-08  
q 1.862807118917113 9.4302e-08 au
tp 2456729.095918510343
(2014-Mar-12.59591851)
3.2042e-05 TDB
node 131.7391617446607 6.4727e-05 deg
peri 229.2518956979998 6.5316e-05 deg
i 3.053955895617212 4.0872e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1072  
   data-arc span      10889 days (29.81 yr)  
   first obs. used      1991-09-14  
   last obs. used      2021-07-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51921  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 14:19:53  

Additional Information
 Jupiter MOID = 2.49444 au 
 T_jup = 3.482 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.446878247353516E-15 -3.5811573024838E-15 -4.927381832596548E-13 1.364461164140879E-14 -1.287702808649059E-13 -2.177198693425844E-16
q -3.5811573024838E-15 8.892784166796864E-15 1.260733550925327E-12 -3.460909850084645E-14 3.309661330480105E-13 6.02534520536629E-16
tp -4.927381832596548E-13 1.260733550925327E-12 1.026716220052146E-9 -1.462963916923954E-11 2.910591295910015E-10 1.322325804658042E-13
node 1.364461164140879E-14 -3.460909850084645E-14 -1.462963916923954E-11 4.189572022615459E-9 -4.186985630287714E-9 4.331892643483574E-11
peri -1.287702808649059E-13 3.309661330480105E-13 2.910591295910015E-10 -4.186985630287714E-9 4.266157968776333E-9 -4.322388846166053E-11
i -2.177198693425844E-16 6.02534520536629E-16 1.322325804658042E-13 4.331892643483574E-11 -4.322388846166053E-11 1.670525083438455E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.51   n/a E2021B10  

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

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