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390924 (2005 ET256)
Classification: Main-belt Asteroid          SPK-ID: 2390924
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 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1543639851160341 1.6404e-07  
a 2.763024034346325 4.338e-08 au
q 2.336512633433245 4.3699e-07 au
i 3.906586913956236 1.166e-05 deg
node 341.5333617665402 9.8229e-05 deg
peri 162.5421575024173 0.00013091 deg
M 143.3253811214639 6.9737e-05 deg
tp 2458332.623710958364
(2018-Aug-02.12371096)
0.00031881 TDB
period 1677.549797346969
4.59
3.9507e-05
1.082e-07
d
yr
n .2145986966046176 5.0539e-09 deg/d
Q 3.189535435259406 5.0076e-08 au
  Orbit Determination Parameters
   # obs. used (total)      78  
   data-arc span      5192 days (14.21 yr)  
   first obs. used      2005-03-11  
   last obs. used      2019-05-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .72653  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-26 04:36:12  

Additional Information
 Earth MOID = 1.34914 au 
 Jupiter MOID = 1.82352 au 
 T_jup = 3.320 
[ 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 17.4   n/a MPO288694  

390924 (2005 ET256)          Discovered 2005-Mar-11 by Mt. Lemmon Survey at Mount Lemmon
Reference: Last Updated: 2014-04-17

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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