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129839 (1999 RH21)
Classification: Main-belt Asteroid          SPK-ID: 2129839
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2036494113083283 5.9264e-08  
a 2.626009040274977 1.3632e-08 au
q 2.09122384513263 1.6129e-07 au
i 7.933232895980892 5.9495e-06 deg
node 6.707120858158683 3.1746e-05 deg
peri 347.2066939344461 3.4124e-05 deg
M 313.9498927115048 1.1115e-05 deg
tp 2459199.324957250299
(2020-Dec-15.82495725)
4.8401e-05 TDB
period 1554.328292042651
4.26
1.2103e-05
3.314e-08
d
yr
n .2316113023503541 1.8035e-09 deg/d
Q 3.160794235417324 1.6409e-08 au
  Orbit Determination Parameters
   # obs. used (total)      418  
   data-arc span      8578 days (23.49 yr)  
   first obs. used      1997-02-04  
   last obs. used      2020-07-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49544  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 10:42:03  

Additional Information
 Earth MOID = 1.08745 au 
 Jupiter MOID = 2.28221 au 
 T_jup = 3.359 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.0   n/a MPO436629  

129839 (1999 RH21)          Discovered 1999-Sep-07 by LINEAR at Socorro
Reference: 20060711/Numbers.arcLast Updated: 2006-07-17
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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