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74920 (1999 TU144)
Classification: Main-belt Asteroid          SPK-ID: 2074920
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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1455134135461597 4.4153e-08  
a 2.22916445973365 9.5299e-09 au
q 1.904791129842025 1.0313e-07 au
i 4.934427672738658 6.1589e-06 deg
node 10.18971143572672 4.6337e-05 deg
peri 78.52128412286201 5.1895e-05 deg
M 68.01938871856127 2.1745e-05 deg
tp 2458970.810143572519
(2020-May-01.31014357)
7.3207e-05 TDB
period 1215.658503724969
3.33
7.7956e-06
2.134e-08
d
yr
n .2961357970983655 1.899e-09 deg/d
Q 2.553537789625274 1.0917e-08 au
  Orbit Determination Parameters
   # obs. used (total)      597  
   data-arc span      7785 days (21.31 yr)  
   first obs. used      1999-09-03  
   last obs. used      2020-12-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55985  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 06:59:32  

Additional Information
 Earth MOID = .92809 au 
 Jupiter MOID = 2.63569 au 
 T_jup = 3.625 
[ 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 16.3   n/a MPO493392  

74920 (1999 TU144)          Discovered 1999-Oct-07 by LINEAR at Socorro
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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