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347331 (2011 UE121)
Classification: Main-belt Asteroid          SPK-ID: 2347331
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 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1033591749286041 7.7628e-08  
a 3.110319647742104 4.7559e-08 au
q 2.788839575187254 2.2843e-07 au
i 9.642595648795076 1.1319e-05 deg
node 20.77859757215712 4.0147e-05 deg
peri 101.4995383436895 6.6868e-05 deg
M 135.4119834570478 5.388e-05 deg
tp 2458246.865864684775
(2018-May-08.36586468)
0.00029714 TDB
period 2003.576653904777
5.49
4.5954e-05
1.258e-07
d
yr
n .1796786757813307 4.1211e-09 deg/d
Q 3.431799720296955 5.2475e-08 au
  Orbit Determination Parameters
   # obs. used (total)      158  
   data-arc span      9013 days (24.68 yr)  
   first obs. used      1994-09-06  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .63293  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 09:25:08  

Additional Information
 Earth MOID = 1.82468 au 
 Jupiter MOID = 1.67922 au 
 T_jup = 3.189 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457196.5 (2015-Jun-23.0) TDB
Reference: JPL 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1049118064781429 7.7268e-08  
q 2.781388243644015 2.2806e-07 au
tp 2456241.959302848606
(2012-Nov-10.45930285)
0.00029122 TDB
node 20.84479600442699 4.0113e-05 deg
peri 100.4993345455289 6.625e-05 deg
i 9.6509904167077 1.1326e-05 deg
  Orbit Determination Parameters
   # obs. used (total)      158  
   data-arc span      9013 days (24.68 yr)  
   first obs. used      1994-09-06  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .63293  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 09:25:08  

Additional Information
 Jupiter MOID = 1.67922 au 
 T_jup = 3.189 
Orbit Covariance (6×6)
  e q tp node peri i
e 5.970320245554394E-15 -1.734534610148641E-14 6.230641765812488E-12 -2.270965219763089E-15 9.986480484241574E-13 -5.328351544492376E-15
q -1.734534610148641E-14 5.20113584009683E-14 -1.987402937379197E-11 -2.224647592858221E-15 -3.058236107529945E-12 1.927202155946722E-14
tp 6.230641765812488E-12 -1.987402937379197E-11 8.481197179976609E-8 1.198421282562854E-10 1.533431658473473E-8 -6.097220238104701E-11
node -2.270965219763089E-15 -2.224647592858221E-15 1.198421282562854E-10 1.609025085395827E-9 -1.564449698712308E-9 -6.40160586457796E-11
peri 9.986480484241574E-13 -3.058236107529945E-12 1.533431658473473E-8 -1.564449698712308E-9 4.389038969756716E-9 5.218495592401964E-11
i -5.328351544492376E-15 1.927202155946722E-14 -6.097220238104701E-11 -6.40160586457796E-11 5.218495592401964E-11 1.282884835258031E-10

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 15.7   n/a MPO434188  

347331 (2011 UE121)          Discovered 2005-Sep-11 by Spacewatch at Kitt Peak
Reference: 20121128/Numbers.arcLast Updated: 2012-12-03

[ show close-approach data ]
Alternate Designations
 2011 UE121 = 2008 EF77 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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