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120502 (1993 QD9)
Classification: Main-belt Asteroid          SPK-ID: 2120502
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1892279795471909 5.9736e-08  
a 2.448720691959186 1.122e-08 au
q 1.98535422294435 1.4589e-07 au
i 4.666366803656752 6.1512e-06 deg
node 357.8988297830981 5.0429e-05 deg
peri 22.34244129410659 5.2024e-05 deg
M 71.28645267517928 9.8863e-06 deg
tp 2459119.351963050525
(2020-Sep-26.85196305)
3.8747e-05 TDB
period 1399.61085953363
3.83
9.6195e-06
2.634e-08
d
yr
n .2572143517948676 1.7678e-09 deg/d
Q 2.912087160974022 1.3343e-08 au
  Orbit Determination Parameters
   # obs. used (total)      557  
   data-arc span      10950 days (29.98 yr)  
   first obs. used      1991-02-08  
   last obs. used      2021-01-31  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55451  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 00:46:37  

Additional Information
 Earth MOID = .987805 au 
 Jupiter MOID = 2.55924 au 
 T_jup = 3.468 
[ 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 16.72   n/a E2021B55  

120502 (1993 QD9)          Discovered 1993-Aug-20 by Elst, E. W. at La Silla
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

Alternate Designations
 1993 QD9 = 2001 VS14 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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