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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 1 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2271404202226872 7.8768e-08  
a 2.409878380156262 2.1434e-08 AU
q 1.862497592202 1.8356e-07 AU
i 3.053890022444815 6.6005e-06 deg
node 131.7405677248767 0.00014278 deg
peri 229.1971932736753 0.00014335 deg
M 18.8430999034987 1.733e-05 deg
tp 2456728.977783483160
(2014-Mar-12.47778348)
6.5079e-05 JED
period 1366.441725508324
3.74
1.823e-05
4.991e-08
d
yr
n .2634579969856219 3.5148e-09 deg/d
Q 2.957259168110524 2.6302e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      519  
   data-arc span      7527 days (20.61 yr)  
   first obs. used      1991-09-14  
   last obs. used      2012-04-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54494  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Aug-06 02:50:04  

Additional Information
 Earth MOID = .859701 AU 
 T_jup = 3.483 
[ 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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