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JPL Small-Body Database Browser
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392186 (2009 QR21)
Classification: Main-belt Asteroid          SPK-ID: 2392186
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .240390358901263 7.8067e-08  
a 3.169843403461208 1.1513e-07 au
q 2.407843610042367 2.4005e-07 au
i 28.69459451174302 1.069e-05 deg
node 148.7664852621993 1.8364e-05 deg
peri 137.2683736599663 2.787e-05 deg
M 358.717755600349 3.2154e-05 deg
tp 2459007.842153309118
(2020-Jun-07.34215331)
0.00018442 TDB
period 2061.366142056905
5.64
0.0001123
3.075e-07
d
yr
n .1746414635688055 9.5145e-09 deg/d
Q 3.931843196880048 1.4281e-07 au
  Orbit Determination Parameters
   # obs. used (total)      125  
   data-arc span      4400 days (12.05 yr)  
   first obs. used      2007-03-16  
   last obs. used      2019-04-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .62314  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 13:00:28  

Additional Information
 Earth MOID = 1.45113 au 
 Jupiter MOID = 1.65955 au 
 T_jup = 2.971 
[ 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 15.8   n/a MPO434452  

392186 (2009 QR21)          Discovered 2008-Apr-08 by CSS at Catalina
Reference: Last Updated: 2014-04-17

[ show close-approach data ]
Alternate Designations
 2009 QR21 = 2013 CC167 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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