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21061 (1991 JD)
Classification: Main-belt Asteroid          SPK-ID: 2021061
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2080337284085998 2.8579e-08  
a 2.349518592043895 8.5524e-09 au
q 1.86073947937568 6.7757e-08 au
i 2.927873346082809 3.8004e-06 deg
node 39.083174104 7.1698e-05 deg
peri 239.7033182015223 7.2373e-05 deg
M 42.95172497191229 1.0766e-05 deg
tp 2459043.555946513441
(2020-Jul-13.05594651)		 3.9081e-05 TDB
period 1315.427012351858
3.60		 7.1824e-06
1.966e-08		 d
yr
n .2736753895272033 1.4943e-09 deg/d
Q 2.838297704712111 1.0332e-08 au
   Orbit Determination Parameters
   # obs. used (total)      1807  
   data-arc span      10846 days (29.69 yr)  
   first obs. used      1991-05-03  
   last obs. used      2021-01-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48411  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 02:50:43  

Additional Information
 Earth MOID = .844597 au 
 Jupiter MOID = 2.3014 au 
 T_jup = 3.527 
[ 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 14.47   n/a E2021B10  

21061 (1991 JD)          Discovered 1991-May-03 by Urata, T. at Oohira
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1991 JD = 1998 FQ56 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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