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JPL Small-Body Database Browser
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91205 (1998 US43)
Classification: TransNeptunian Object          SPK-ID: 2091205
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1329369285609463 0.00014651  
a 39.09701098239935 0.010888 au
q 33.89957442648559 0.0040224 au
i 10.61860309021932 0.00036876 deg
node 223.895969778885 0.00049879 deg
peri 138.8318402445676 0.061685 deg
M 67.76706472776627 0.073468 deg
tp 2442191.962187171768
(1974-May-24.46218717)
11.254 TDB
period 89292.24892544078
244.47
37.299
0.1021
d
yr
n .004031704927721115 1.6841e-06 deg/d
Q 44.2944475383131 0.012335 au
  Orbit Determination Parameters
   # obs. used (total)      25  
   data-arc span      6314 days (17.29 yr)  
   first obs. used      1998-10-22  
   last obs. used      2016-02-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      4  
   norm. resid. RMS      .24677  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-11 14:18:41  

Additional Information
 Earth MOID = 32.9052 au 
 Jupiter MOID = 29.0009 au 
 T_jup = 5.474 
[ hide covariance matrix ]
Orbital Elements at Epoch 2452585.5 (2002-Nov-07.0) TDB
Reference: JPL 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1336361716491391 0.00015584  
q 34.17550921064783 0.0037424 au
tp 2442914.991707304836
(1976-May-16.49170730)
10.691 TDB
node 223.8413782340835 0.0004993 deg
peri 142.9269566911445 0.057606 deg
i 10.5922335233665 0.00036773 deg
  Orbit Determination Parameters
   # obs. used (total)      25  
   data-arc span      6314 days (17.29 yr)  
   first obs. used      1998-10-22  
   last obs. used      2016-02-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      4  
   norm. resid. RMS      .24677  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-11 14:18:41  

Additional Information
 Jupiter MOID = 29.0009 au 
 T_jup = 5.474 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.428643638768821E-8 5.117659310802698E-7 .001552328010406553 -2.447455399888974E-10 8.271406260773719E-6 2.026954265686945E-9
q 5.117659310802698E-7 1.400558413481752E-5 .0396431988211775 -2.12662320732058E-8 .0002143353351933864 3.610337120332183E-8
tp .001552328010406553 .0396431988211775 114.287405745371 -5.024592881021179E-5 .6155656878375092 .0001151112610995027
node -2.447455399888974E-10 -2.12662320732058E-8 -5.024592881021179E-5 2.493006336364497E-7 -5.282369498372213E-7 1.533050553273734E-7
peri 8.271406260773719E-6 .0002143353351933864 .6155656878375092 -5.282369498372213E-7 .003318395402377962 4.564286738686703E-7
i 2.026954265686945E-9 3.610337120332183E-8 .0001151112610995027 1.533050553273734E-7 4.564286738686703E-7 1.352242700669717E-7

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 8.0   n/a MPO157287  

91205 (1998 US43)          Discovered 1998-Oct-22 by Buie, M. W. at Kitt Peak
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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