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117280 (2004 TW121)
Classification: Main-belt Asteroid          SPK-ID: 2117280
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1237590184127324 4.0775e-08  
a 2.742066100773732 1.799e-08 au
q 2.402710691719146 1.1321e-07 au
i .818554158600421 4.0703e-06 deg
node 242.448038513615 0.00034222 deg
peri 71.79379881760408 0.00034279 deg
M 212.1898615662696 2.2709e-05 deg
tp 2459681.452830578476
(2022-Apr-11.95283058)
0.00010744 TDB
period 1658.499353331975
4.54
1.6321e-05
4.468e-08
d
yr
n .2170636963329224 2.1361e-09 deg/d
Q 3.081421509828318 2.0216e-08 au
  Orbit Determination Parameters
   # obs. used (total)      457  
   data-arc span      8893 days (24.35 yr)  
   first obs. used      1995-09-27  
   last obs. used      2020-02-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56917  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 05:45:11  

Additional Information
 Earth MOID = 1.38896 au 
 Jupiter MOID = 2.17158 au 
 T_jup = 3.338 
[ 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 16.0   n/a MPO417610  

117280 (2004 TW121)          Discovered 2004-Oct-07 by LONEOS at Anderson Mesa
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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