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129431 (4355 T-3)
Classification: Main-belt Asteroid          SPK-ID: 2129431
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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2413998773359825 8.5281e-08  
a 2.523585620447767 1.0867e-08 au
q 1.914392361224826 2.1737e-07 au
i 7.962542738609107 5.9755e-06 deg
node 56.72427375928797 5.0214e-05 deg
peri 301.1643890089298 5.0698e-05 deg
M 337.8424257761154 8.5792e-06 deg
tp 2459486.624984916822
(2021-Sep-29.12498492)
3.518e-05 TDB
period 1464.284593711624
4.01
9.4578e-06
2.589e-08
d
yr
n .2458538466811857 1.588e-09 deg/d
Q 3.132778879670707 1.349e-08 au
  Orbit Determination Parameters
   # obs. used (total)      419  
   data-arc span      15562 days (42.61 yr)  
   first obs. used      1977-10-16  
   last obs. used      2020-05-25  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .60317  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 17:46:33  

Additional Information
 Earth MOID = .924898 au 
 Jupiter MOID = 2.3561 au 
 T_jup = 3.400 
[ 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 16.54   n/a E2021B55  

129431 (4355 T-3)          Discovered 1977-Oct-16 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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