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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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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1798183985832193 3.5027e-08  
a 3.159096340392995 1.7957e-08 au
q 2.591032695493418 1.1753e-07 au
i 1.872484898356782 3.9315e-06 deg
node 103.7102145285672 0.00013868 deg
peri 233.0788705288334 0.00013933 deg
M 314.5560816848689 1.4735e-05 deg
tp 2459459.390433242587
(2021-Sep-01.89043324)
8.4592e-05 TDB
period 2050.891723751275
5.62
1.7487e-05
4.788e-08
d
yr
n .1755334013155633 1.4967e-09 deg/d
Q 3.727159985292572 2.1186e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1518  
   data-arc span      10753 days (29.44 yr)  
   first obs. used      1991-03-15  
   last obs. used      2020-08-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49956  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 01:54:52  

Additional Information
 Earth MOID = 1.5803 au 
 Jupiter MOID = 1.66011 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 13.64   n/a E2021B10  

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

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