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213385 (2001 US81)
Classification: Main-belt Asteroid          SPK-ID: 2213385
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .144010163292348 4.2023e-08  
a 3.082334386768703 3.594e-08 au
q 2.638446908408523 1.2719e-07 au
i 17.2784307225848 7.2016e-06 deg
node 41.56290322974081 1.6775e-05 deg
peri 74.26249058242222 3.1267e-05 deg
M 137.1074338158427 2.6031e-05 deg
tp 2458447.705295320760
(2018-Nov-25.20529532)
0.00013934 TDB
period 1976.59664499688
5.41
3.4571e-05
9.465e-08
d
yr
n .1821312410456754 3.1855e-09 deg/d
Q 3.526221865128884 4.1116e-08 au
  Orbit Determination Parameters
   # obs. used (total)      257  
   data-arc span      6821 days (18.67 yr)  
   first obs. used      2001-10-20  
   last obs. used      2020-06-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55206  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 23:42:29  

Additional Information
 Earth MOID = 1.71632 au 
 Jupiter MOID = 1.8741 au 
 T_jup = 3.143 
[ show covariance matrix ]

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 15.61   n/a MPCxxxxx  

213385 (2001 US81)          Discovered 2001-Oct-20 by LINEAR at Socorro
Reference: 20090509/Numbers.arcLast Updated: 2009-05-11

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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