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JPL Small-Body Database Browser
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21730 Ignaciorod (1999 RG138)
Classification: Main-belt Asteroid          SPK-ID: 2021730
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1128141966349116 3.9609e-08  
a 2.206629557930179 8.2791e-09 au
q 1.957690417081436 8.6354e-08 au
i 3.940510600496471 4.7209e-06 deg
node 357.8741048493448 7.1048e-05 deg
peri 289.6384704159546 7.4929e-05 deg
M 158.9389413237117 2.5271e-05 deg
tp 2458471.908239862345
(2018-Dec-19.40823986)
8.3588e-05 TDB
period 1197.271304720628
3.28
6.7381e-06
1.845e-08
d
yr
n .3006837285589189 1.6922e-09 deg/d
Q 2.455568698778923 9.2131e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1081  
   data-arc span      9062 days (24.81 yr)  
   first obs. used      1995-04-06  
   last obs. used      2020-01-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50585  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 23:29:59  

Additional Information
 Earth MOID = .945739 au 
 Jupiter MOID = 2.67866 au 
 T_jup = 3.649 
[ 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 15.4   n/a MPO502328  

21730 Ignaciorod           Discovered 1999 Sept. 9 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Ignacio Gabriel Rodriguez (b. 1985) was awarded second place in the 2005 Intel International Science and Engineering Fair for his engineering team project. He attends the Escuela No. 139 Tecnica de Produccion Agroindustrial, Viale, Entre Rios, Argentina.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20050822/MPCPages.arcLast Updated: 2005-08-26

Alternate Designations
 1999 RG138 = 1998 BX22 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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