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JPL Small-Body Database Browser
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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07130959158772873 4.616e-08  
a 3.151352750333818 3.1301e-08 au
q 2.926631072758648 1.4358e-07 au
i 8.84616885648698 6.2126e-06 deg
node 193.7610277753267 2.9307e-05 deg
peri 124.2584065143564 5.0261e-05 deg
M 63.09996353853646 4.0234e-05 deg
tp 2458242.345375521090
(2018-May-03.84537552)
0.00022788 TDB
period 2043.355615152832
5.59
3.0444e-05
8.335e-08
d
yr
n .17618078680498 2.6249e-09 deg/d
Q 3.376074427908988 3.3533e-08 au
  Orbit Determination Parameters
   # obs. used (total)      471  
   data-arc span      6677 days (18.28 yr)  
   first obs. used      2001-07-20  
   last obs. used      2019-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59799  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 19:45:16  

Additional Information
 Earth MOID = 1.92509 au 
 Jupiter MOID = 1.87968 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

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