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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.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07114156762537006 1.2326e-07  
a 2.689804698465245 3.1922e-08 au
q 2.498447775610342 3.5452e-07 au
i 5.980875577801084 6.5521e-06 deg
node 71.98128236661499 7.6525e-05 deg
peri 259.8660386315766 9.6813e-05 deg
M 44.68680194924151 5.2764e-05 deg
tp 2459196.487875447723
(2020-Dec-12.98787545)
0.00023689 TDB
period 1611.311655745864
4.41
2.8684e-05
7.853e-08
d
yr
n .2234204653806458 3.9773e-09 deg/d
Q 2.881161621320149 3.4193e-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.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54106  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 08:37:36  

Additional Information
 Earth MOID = 1.49552 au 
 Jupiter MOID = 2.35362 au 
 T_jup = 3.361 
[ 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 17.25   n/a E2021B25  

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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