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85751 (1998 SU144)
Classification: Main-belt Asteroid          SPK-ID: 2085751
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 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1556991883510861 4.2979e-08  
a 2.337619266469175 1.0288e-08 au
q 1.973653844006063 1.0092e-07 au
i 3.678487228968184 4.8025e-06 deg
node 30.64136714217074 7.0661e-05 deg
peri 329.4542788879007 7.2105e-05 deg
M 36.91314960181883 1.6363e-05 deg
tp 2458866.644045294063
(2020-Jan-18.14404529)
5.8924e-05 TDB
period 1305.446547204493
3.57
8.6178e-06
2.359e-08
d
yr
n .275767706284804 1.8204e-09 deg/d
Q 2.701584688932287 1.1889e-08 au
  Orbit Determination Parameters
   # obs. used (total)      514  
   data-arc span      10084 days (27.61 yr)  
   first obs. used      1993-03-20  
   last obs. used      2020-10-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56368  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 20:59:56  

Additional Information
 Earth MOID = .971584 au 
 Jupiter MOID = 2.74663 au 
 T_jup = 3.547 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456926.5 (2014-Sep-26.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1569430897325102 4.3044e-08  
q 1.970328923221636 1.0116e-07 au
tp 2457561.397676406469
(2016-Jun-21.89767641)
5.4809e-05 TDB
node 30.68072297421121 7.056e-05 deg
peri 329.5220028855744 7.1978e-05 deg
i 3.682394515565801 4.806e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      514  
   data-arc span      10084 days (27.61 yr)  
   first obs. used      1993-03-20  
   last obs. used      2020-10-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56368  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 20:59:56  

Additional Information
 Jupiter MOID = 2.74663 au 
 T_jup = 3.547 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.852792771304969E-15 -4.338333568308683E-15 3.987527764622548E-14 4.240884792102599E-15 -7.404714655772029E-15 -1.605242294596534E-17
q -4.338333568308683E-15 1.023373218835014E-14 6.470364954982961E-14 -1.024512621698219E-14 4.654961807272635E-14 2.221948666327766E-16
tp 3.987527764622548E-14 6.470364954982961E-14 3.004038651471782E-9 -3.10649860309753E-12 7.943742570515286E-10 5.864467184156945E-13
node 4.240884792102599E-15 -1.024512621698219E-14 -3.10649860309753E-12 4.978731376095304E-9 -4.968664993618791E-9 -2.991692862664423E-11
peri -7.404714655772029E-15 4.654961807272635E-14 7.943742570515286E-10 -4.968664993618791E-9 5.180878602230838E-9 2.999751799605198E-11
i -1.605242294596534E-17 2.221948666327766E-16 5.864467184156945E-13 -2.991692862664423E-11 2.999751799605198E-11 2.309738120855425E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.1   n/a MPO436374  

85751 (1998 SU144)          Discovered 1998-Sep-20 by Elst, E. W. at La Silla
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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