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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3129063707017527 6.8644e-08  
a 2.369805731893682 1.0792e-08 au
q 1.628278421058619 1.6267e-07 au
i 6.613388522234908 7.1407e-06 deg
node 343.2818454913311 4.1766e-05 deg
peri 2.593443032442197 4.2712e-05 deg
M 301.6420135194871 1.4463e-05 deg
tp 2459416.505765644923
(2021-Jul-21.00576564)
5.4732e-05 TDB
period 1332.501004950522
3.65
9.1018e-06
2.492e-08
d
yr
n .2701686517777653 1.8454e-09 deg/d
Q 3.111333042728745 1.4168e-08 au
  Orbit Determination Parameters
   # obs. used (total)      382  
   data-arc span      9570 days (26.20 yr)  
   first obs. used      1994-03-04  
   last obs. used      2020-05-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .56635  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:39:27  

Additional Information
 Earth MOID = .619381 au 
 Jupiter MOID = 2.31439 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 16.73   n/a E2021B55  

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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