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101931 (1999 RZ20)
Classification: Mars-crossing Asteroid          SPK-ID: 2101931
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3128230002472127 7.1066e-08  
a 2.369582425312208 1.0941e-08 au
q 1.628322541692976 1.6843e-07 au
i 6.613395371491725 7.4983e-06 deg
node 343.2833619940775 4.358e-05 deg
peri 2.608253425587532 4.451e-05 deg
M 247.5754483004364 1.4214e-05 deg
tp 2459416.568484263856
(2021-Jul-21.06848426)
5.4909e-05 TDB
period 1332.312667212261
3.65
9.2273e-06
2.526e-08
d
yr
n .2702068432279234 1.8714e-09 deg/d
Q 3.11084230893144 1.4363e-08 au
  Orbit Determination Parameters
   # obs. used (total)      378  
   data-arc span      9570 days (26.20 yr)  
   first obs. used      1994-03-04  
   last obs. used      2020-05-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56814  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 19:57:41  

Additional Information
 Earth MOID = .621227 au 
 Jupiter MOID = 2.31427 au 
 T_jup = 3.469 
[ 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 16.7   n/a MPO320197  

101931 (1999 RZ20)          Discovered 1999-Sep-07 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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