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345842 Alexparker (2007 LG31)
Classification: Main-belt Asteroid          SPK-ID: 2345842
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07212579697301923 1.23e-07  
a 2.692243395515324 3.2499e-08 au
q 2.498063194968434 3.5483e-07 au
i 5.982929667001532 6.5547e-06 deg
node 72.02518105478576 7.6442e-05 deg
peri 260.1756461331678 9.6115e-05 deg
M 315.9704012431289 5.2163e-05 deg
tp 2459197.838641526850
(2020-Dec-14.33864153)
0.00023305 TDB
period 1613.503483008225
4.42
2.9215e-05
7.999e-08
d
yr
n .2231169649096846 4.0399e-09 deg/d
Q 2.886423596062214 3.4843e-08 au
  Orbit Determination Parameters
   # obs. used (total)      120  
   data-arc span      7551 days (20.67 yr)  
   first obs. used      1999-12-13  
   last obs. used      2020-08-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54098  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-11 16:59:11  

Additional Information
 Earth MOID = 1.49597 au 
 Jupiter MOID = 2.35466 au 
 T_jup = 3.360 
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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.2   n/a MPO471590  

345842 Alexparker           Discovered 2007 June 12 by D. D. Balam at Mauna Kea.
Alex H. Parker (b. 1987) is an American astronomer whose research on asteroids and trans-neptunian objects has contributed to the understanding of solar system formation and evolution. He is the co-discoverer of several minor planets.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2013-11-17Last Updated: 2014-11-10
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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