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146634 (2001 US42)
Classification: Main-belt Asteroid          SPK-ID: 2146634
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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05884136418879896 3.9372e-08  
a 2.666491250291869 2.0459e-08 au
q 2.509591267527199 1.0496e-07 au
i 1.409105921834376 5.0809e-06 deg
node 186.3546097353961 0.00018018 deg
peri 255.4496578597708 0.00018748 deg
M 50.537190547972 4.9809e-05 deg
tp 2458777.236738081197
(2019-Oct-20.73673808)
0.00021959 TDB
period 1590.408438206984
4.35
1.8304e-05
5.011e-08
d
yr
n .2263569479082125 2.6052e-09 deg/d
Q 2.823391233056539 2.1663e-08 au
  Orbit Determination Parameters
   # obs. used (total)      441  
   data-arc span      6710 days (18.37 yr)  
   first obs. used      2001-09-19  
   last obs. used      2020-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57342  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 08:38:30  

Additional Information
 Earth MOID = 1.52585 au 
 Jupiter MOID = 2.30109 au 
 T_jup = 3.380 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456932.5 (2014-Oct-02.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05692968610753798 3.9228e-08  
q 2.514388250715204 1.0427e-07 au
tp 2457188.279110997733
(2015-Jun-14.77911100)
0.00022555 TDB
node 186.3838475995351 0.00018054 deg
peri 255.8119533806013 0.00018835 deg
i 1.406254367570737 5.0805e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      441  
   data-arc span      6710 days (18.37 yr)  
   first obs. used      2001-09-19  
   last obs. used      2020-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57342  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 08:38:30  

Additional Information
 Jupiter MOID = 2.30109 au 
 T_jup = 3.380 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.538838071591039E-15 -4.020712969754335E-15 -1.022962025097452E-12 4.454610796387046E-16 -2.65009611482742E-13 -2.549726470369015E-16
q -4.020712969754335E-15 1.087204190814741E-14 3.084677828358996E-12 1.228876816192777E-16 7.73501162986947E-13 7.56531504467358E-16
tp -1.022962025097452E-12 3.084677828358996E-12 5.087358194191417E-8 -1.691815708987516E-10 1.211822391743475E-8 -2.668031773426145E-12
node 4.454610796387046E-16 1.228876816192777E-16 -1.691815708987516E-10 3.259629370683467E-8 -3.262567439935606E-8 2.203367678476175E-12
peri -2.65009611482742E-13 7.73501162986947E-13 1.211822391743475E-8 -3.262567439935606E-8 3.547408746880166E-8 -2.821029602807406E-12
i -2.549726470369015E-16 7.56531504467358E-16 -2.668031773426145E-12 2.203367678476175E-12 -2.821029602807406E-12 2.581159444349998E-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 16.26   n/a E2021B55  

146634 (2001 US42)          Discovered 2001-Oct-17 by LINEAR at Socorro
Reference: 20070106/Numbers.arcLast Updated: 2007-01-09

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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