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JPL Small-Body Database Browser
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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1612208495288724 6.3909e-08  
a 2.352820052129766 2.8421e-08 au
q 1.973496404536839 1.3833e-07 au
i 2.964569945085771 5.2363e-06 deg
node 64.41435883801195 0.00015156 deg
peri 141.7969836384335 0.00015362 deg
M 64.39604675082477 3.0017e-05 deg
tp 2458364.703039633802
(2018-Sep-03.20303963)
0.0001071 TDB
period 1318.200573092543
3.61
2.3885e-05
6.539e-08
d
yr
n .2730995626526151 4.9484e-09 deg/d
Q 2.732143699722693 3.3003e-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 = .970297 au 
 Jupiter MOID = 2.22834 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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