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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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07178018967605056 3.0149e-07  
a 2.690270318016847 5.7987e-08 au
q 2.497162204309749 7.9896e-07 au
i 5.985363981153529 2.0812e-05 deg
node 72.03649659580944 0.00026264 deg
peri 261.5070130099413 0.00036236 deg
M 317.3081387540518 0.00024458 deg
tp 2457591.632656252059
(2016-Jul-22.13265625)
0.0010985 JED
period 1611.730063825021
4.41
5.211e-05
1.427e-07
d
yr
n .2233624650182636 7.2217e-09 deg/d
Q 2.883378431723946 6.215e-08 au
  Orbit Determination Parameters
   # obs. used (total)      50  
   data-arc span      5630 days (15.41 yr)  
   first obs. used      1999-12-13  
   last obs. used      2015-05-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51472  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-05 03:56:08  

Additional Information
 Earth MOID = 1.49348 au 
 Jupiter MOID = 2.35451 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: 2014-11-10
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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