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173087 (2007 RJ20)
Classification: Main-belt Asteroid          SPK-ID: 2173087
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07145427989796838 4.0735e-08  
a 3.152316957407172 2.9594e-08 au
q 2.927070419205488 1.2049e-07 au
i 8.844584290616297 5.0848e-06 deg
node 193.7478779946526 2.79e-05 deg
peri 124.5402248502884 4.6611e-05 deg
M 133.2619580614325 3.82e-05 deg
tp 2458243.759576612982
(2018-May-05.25957661)
0.00021442 TDB
period 2044.293483168996
5.60
2.8788e-05
7.882e-08
d
yr
n .1760999596994948 2.4798e-09 deg/d
Q 3.377563495608856 3.1708e-08 au
  Orbit Determination Parameters
   # obs. used (total)      521  
   data-arc span      6765 days (18.52 yr)  
   first obs. used      2001-07-20  
   last obs. used      2020-01-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57505  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 16:59:03  

Additional Information
 Earth MOID = 1.92636 au 
 Jupiter MOID = 1.87966 au 
 T_jup = 3.185 
[ 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 15.0   n/a MPO417932  
diameter diameter 5.795 km 0.219 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.058   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

173087 (2007 RJ20)          Discovered 2007-Sep-02 by CSS at Catalina
Reference: 20071224/Numbers.arcLast Updated: 2007-12-22

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Alternate Designations
 2007 RJ20 = 2005 JE182 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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