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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 ]

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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .207936361496065 2.8456e-08  
a 2.348956637373047 8.2888e-09 au
q 1.860523140885664 6.7474e-08 au
i 2.928111644761812 3.5643e-06 deg
node 39.07944341336317 7.0929e-05 deg
peri 239.6502968041827 7.1545e-05 deg
M 96.66679287865166 1.0704e-05 deg
tp 2459043.409741607559
(2020-Jul-12.90974161)
3.8431e-05 TDB
period 1314.955107498459
3.60
6.9601e-06
1.906e-08
d
yr
n .2737736048532149 1.4491e-09 deg/d
Q 2.837390133860429 1.0012e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1859  
   data-arc span      11033 days (30.21 yr)  
   first obs. used      1991-05-03  
   last obs. used      2021-07-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47813  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 21:47:49  

Additional Information
 Earth MOID = .846049 au 
 Jupiter MOID = 2.30092 au 
 T_jup = 3.528 
[ 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 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

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