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120781 (1998 EL11)
Classification: Main-belt Asteroid          SPK-ID: 2120781
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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2355741541074898 3.8496e-08  
a 2.622684714326989 1.5526e-08 au
q 2.004847981258765 9.8527e-08 au
i 5.738628315606717 4.5947e-06 deg
node 38.45113537312229 5.4128e-05 deg
peri 191.2811896998847 5.5375e-05 deg
M 46.76419822251032 1.2729e-05 deg
tp 2458798.975177902717
(2019-Nov-11.47517790)
5.4313e-05 TDB
period 1551.37773580174
4.25
1.3776e-05
3.772e-08
d
yr
n .2320518025314801 2.0605e-09 deg/d
Q 3.240521447395213 1.9183e-08 au
  Orbit Determination Parameters
   # obs. used (total)      620  
   data-arc span      8186 days (22.41 yr)  
   first obs. used      1998-03-01  
   last obs. used      2020-07-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53171  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 10:11:00  

Additional Information
 Earth MOID = .995149 au 
 Jupiter MOID = 1.75502 au 
 T_jup = 3.357 
[ 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 15.7   n/a MPO432708  

120781 (1998 EL11)          Discovered 1998-Mar-01 by Elst, E. W. at La Silla
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

[ show close-approach data ]
Alternate Designations
 1998 EL11 = 2002 CH31 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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