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442189 (2011 ER54)
Classification: Main-belt Asteroid          SPK-ID: 2442189
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1611597972456226 6.3904e-08  
a 2.35216661449608 2.8309e-08 au
q 1.973091919815969 1.3831e-07 au
i 2.964442843493741 5.2362e-06 deg
node 64.41015675390945 0.00015159 deg
peri 141.6731992954348 0.00015366 deg
M 173.8168696090005 3.1406e-05 deg
tp 2458364.305408774246
(2018-Sep-02.80540877)
0.00010715 TDB
period 1317.651464765604
3.61
2.3787e-05
6.513e-08
d
yr
n .2732133721446895 4.9323e-09 deg/d
Q 2.731241309176191 3.2871e-08 au
  Orbit Determination Parameters
   # obs. used (total)      92  
   data-arc span      4668 days (12.78 yr)  
   first obs. used      2006-12-14  
   last obs. used      2019-09-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .68767  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-08 15:59:34  

Additional Information
 Earth MOID = .969684 au 
 Jupiter MOID = 2.22816 au 
 T_jup = 3.537 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.6   n/a MPO437719  

442189 (2011 ER54)          Discovered 2011-Jan-08 by Mt. Lemmon Survey at Mount Lemmon
Reference: Last Updated: 2015-09-02
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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