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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2079363614159945 2.8477e-08  
a 2.34895663740433 8.2977e-09 au
q 1.860523141098524 6.7534e-08 au
i 2.928111641928798 3.5646e-06 deg
node 39.07944360976135 7.1028e-05 deg
peri 239.6502965760375 7.1644e-05 deg
M 96.66679289435326 1.0705e-05 deg
tp 2459043.409741543153
(2020-Jul-12.90974154)
3.8434e-05 TDB
period 1314.955107524728
3.60
6.9676e-06
1.908e-08
d
yr
n .2737736048477458 1.4507e-09 deg/d
Q 2.837390133710135 1.0023e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1834  
   data-arc span      10846 days (29.69 yr)  
   first obs. used      1991-05-03  
   last obs. used      2021-01-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48088  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:37:59  

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 | 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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