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120212 (2004 EM54)
Classification: Main-belt Asteroid          SPK-ID: 2120212
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1424287045324421 3.4379e-08  
a 2.294867480527818 7.9373e-09 au
q 1.968012478202611 7.9046e-08 au
i 6.407230590359313 7.5362e-06 deg
node 178.1871517790275 4.2651e-05 deg
peri 129.810730713504 5.1595e-05 deg
M 132.4742617654075 2.9623e-05 deg
tp 2458533.234354470493
(2019-Feb-18.73435447)
0.00010392 TDB
period 1269.798601999443
3.48
6.5878e-06
1.804e-08
d
yr
n .2835095261824505 1.4709e-09 deg/d
Q 2.621722482853023 9.0678e-09 au
  Orbit Determination Parameters
   # obs. used (total)      540  
   data-arc span      10361 days (28.37 yr)  
   first obs. used      1991-09-15  
   last obs. used      2020-01-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50487  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 06:16:36  

Additional Information
 Earth MOID = .960987 au 
 Jupiter MOID = 2.63068 au 
 T_jup = 3.574 
[ 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 16.5   n/a MPO432704  

120212 (2004 EM54)          Discovered 2004-Mar-13 by NEAT at Palomar
Reference: 20051116/Numbers.arcLast Updated: 2005-11-21

[ show close-approach data ]
Alternate Designations
 2004 EM54 = 1997 GH45 = 1998 SJ102 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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