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21807 (1999 TH14)
Classification: Main-belt Asteroid          SPK-ID: 2021807
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1800889282150799 3.4611e-08  
a 3.16137900564161 1.6008e-08 au
q 2.592049648833957 1.153e-07 au
i 1.872203621812066 3.5662e-06 deg
node 103.707750916173 0.00012198 deg
peri 232.8193282520841 0.00012251 deg
M 349.1508885197755 1.0837e-05 deg
tp 2459458.373537292704
(2021-Aug-31.87353729)
6.1794e-05 TDB
period 2053.114991580155
5.62
1.5594e-05
4.269e-08
d
yr
n .1753433205038995 1.3318e-09 deg/d
Q 3.730708362449263 1.8891e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1663  
   data-arc span      11104 days (30.40 yr)  
   first obs. used      1991-03-15  
   last obs. used      2021-08-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48894  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 22:45:49  

Additional Information
 Earth MOID = 1.58235 au 
 Jupiter MOID = 1.65547 au 
 T_jup = 3.179 
[ 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 13.68   n/a MPO636391  

21807 (1999 TH14)          Discovered 1999-Oct-10 by Korlevic, K., Juric, M. at Visnjan
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 TH14 = 1993 QC6 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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