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21060 (1991 JC)
Classification: Main-belt Asteroid          SPK-ID: 2021060
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 .192514444127534 2.4549e-08  
a 2.343894322515057 6.4406e-09 au
q 1.892660809922388 5.7424e-08 au
i 3.467053699890287 2.7965e-06 deg
node 70.26981006305606 5.3006e-05 deg
peri 193.0887562874934 5.3628e-05 deg
M 62.18775379630608 7.9323e-06 deg
tp 2458974.083622766098
(2020-May-04.58362277)
2.8885e-05 TDB
period 1310.706543143328
3.59
5.4024e-06
1.479e-08
d
yr
n .2746610230056916 1.1321e-09 deg/d
Q 2.795127835107726 7.6805e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1961  
   data-arc span      10838 days (29.67 yr)  
   first obs. used      1991-05-02  
   last obs. used      2021-01-02  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4749  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:37:56  

Additional Information
 Earth MOID = .875498 au 
 Jupiter MOID = 2.28011 au 
 T_jup = 3.535 
[ 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 14.71   n/a E2021B10  

21060 (1991 JC)          Discovered 1991-May-02 by Urata, T. at Oohira
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1991 JC = 1998 HF131 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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