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

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 3 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07164337088882403 4.7129e-07  
a 2.689817630108268 7.2354e-08 AU
q 2.497110028011124 1.2292e-06 AU
i 5.985775179467068 2.1408e-05 deg
node 72.03726994691566 0.00027971 deg
peri 261.6560846849338 0.00042887 deg
M 227.7856015145981 0.00033063 deg
tp 2457592.278160171561
(2016-Jul-22.77816017)
0.0014976 JED
period 1611.323275696666
4.41
6.5015e-05
1.78e-07
d
yr
n .2234188541987962 9.0147e-09 deg/d
Q 2.882525232205412 7.7538e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      46  
   data-arc span      5173 days (14.16 yr)  
   first obs. used      1999-12-13  
   last obs. used      2014-02-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .48963  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-12 18:25:50  

Additional Information
 Earth MOID = 1.49609 AU 
 T_jup = 3.361 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.3 mag n/a MPO242593  

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: 2013-11-20
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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