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85771 (1998 UR4)
Classification: Main-belt Asteroid          SPK-ID: 2085771
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1632559858984436 5.0115e-08  
a 2.633134458642139 2.5464e-08 au
q 2.203259496593352 1.3948e-07 au
i 13.09389637886595 6.5065e-06 deg
node 165.7001420301337 2.0147e-05 deg
peri 226.9141404274439 2.8472e-05 deg
M 345.5595406837701 2.5446e-05 deg
tp 2459063.101752068551
(2020-Aug-01.60175207)
0.00011094 TDB
period 1560.658857945681
4.27
2.2639e-05
6.198e-08
d
yr
n .2306718077222037 3.3461e-09 deg/d
Q 3.063009420690926 2.9621e-08 au
  Orbit Determination Parameters
   # obs. used (total)      583  
   data-arc span      8071 days (22.10 yr)  
   first obs. used      1998-08-17  
   last obs. used      2020-09-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57243  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Oct-22 19:10:38  

Additional Information
 Earth MOID = 1.2281 au 
 Jupiter MOID = 2.45016 au 
 T_jup = 3.343 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456622.5 (2013-Nov-26.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1656498308888492 5.0671e-08  
q 2.196047844455546 1.4138e-07 au
tp 2455938.744902035623
(2012-Jan-12.24490204)
8.314e-05 TDB
node 165.9020693458159 2.0121e-05 deg
peri 226.136966415006 2.8122e-05 deg
i 13.1069815216023 6.5123e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      583  
   data-arc span      8071 days (22.10 yr)  
   first obs. used      1998-08-17  
   last obs. used      2020-09-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57243  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Oct-22 19:10:38  

Additional Information
 Jupiter MOID = 2.45016 au 
 T_jup = 3.343 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.56752436369358E-15 -7.08858010740564E-15 -1.920459805440613E-12 -3.156980739027841E-15 -4.481315906747771E-13 4.277257834169281E-15
q -7.08858010740564E-15 1.998795585732787E-14 5.729665744315975E-12 7.153876487937437E-15 1.369473611854334E-12 -9.938157818405769E-15
tp -1.920459805440613E-12 5.729665744315975E-12 6.912209715824812E-9 -1.104934266673627E-11 1.64428423600771E-9 -3.137008482336635E-12
node -3.156980739027841E-15 7.153876487937437E-15 -1.104934266673627E-11 4.048682841634402E-10 -3.964004644362287E-10 -1.709994797144196E-12
peri -4.481315906747771E-13 1.369473611854334E-12 1.64428423600771E-9 -3.964004644362287E-10 7.908350321788279E-10 1.0682230183018E-12
i 4.277257834169281E-15 -9.938157818405769E-15 -3.137008482336635E-12 -1.709994797144196E-12 1.0682230183018E-12 4.241035908307989E-11

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 15.3   n/a MPO493477  

85771 (1998 UR4)          Discovered 1998-Oct-20 by ODAS at Caussols
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

[ show close-approach data ]
Alternate Designations
 1998 UR4 = 2000 AP202 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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