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

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Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 3 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2271704732111894 7.3245e-08  
a 2.41037730155583 1.961e-08 AU
q 1.862810749343882 1.696e-07 AU
i 3.053952258047099 6.0383e-06 deg
node 131.7394470546668 0.00012428 deg
peri 229.2521471922304 0.00012493 deg
M 71.4810518969981 1.6783e-05 deg
tp 2456729.097149687502
(2014-Mar-12.59714969)
6.1307e-05 JED
period 1366.866092755447
3.74
1.6681e-05
4.567e-08
d
yr
n .2633762018884241 3.2141e-09 deg/d
Q 2.957943853767778 2.4065e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      551  
   data-arc span      8502 days (23.28 yr)  
   first obs. used      1991-09-14  
   last obs. used      2014-12-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55443  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jan-08 04:02:12  

Additional Information
 Earth MOID = .861545 AU 
 T_jup = 3.482 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.5 mag n/a MPO229321  

43810 (1991 RJ20)          Discovered 1991-Sep-14 by Holt, H. E. at Palomar (675)
Reference: 20020822/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1991 RJ20 = 1995 XZ4 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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