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12131 Echternach (2085 P-L)
Classification: Main-belt Asteroid          SPK-ID: 2012131
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

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Orbit Diagram
Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet was implemented using 2-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet has stopped working because of a recent Java upgrade, here is a possible workaround.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).

Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02234693350281049 6.286e-08  
a 2.904348084393263 2.3494e-08 au
q 2.839444810882311 1.8916e-07 au
i .9984623586172898 5.5604e-06 deg
node 278.2103029739922 0.00035386 deg
peri 198.6293451388495 0.00037998 deg
M 317.0345710760749 0.00014246 deg
tp 2457616.268516409890
0.00071589 JED
period 1807.887593653386
n .1991274243286943 2.4162e-09 deg/d
Q 2.969251357904214 2.4019e-08 au
  Orbit Determination Parameters
   # obs. used (total)      987  
   data-arc span      20172 days (55.23 yr)  
   first obs. used      1960-09-24  
   last obs. used      2015-12-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5362  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 13:19:45  

Additional Information
 Earth MOID = 1.85555 au 
 Jupiter MOID = 2.03679 au 
 T_jup = 3.285 
[ 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 14.4 mag n/a MPO309247  

12131 Echternach           Discovered 1960 Sept. 24 by C. J. van Houten and I. van Houten-Groeneveld at Leiden on Palomar Schmidt plates taken by T. Gehrels.
As assistant editor of the Dutch astronomical magazine Zenit, Dutch science writer Eddy Echternach (b. 1961) has been popularizing astronomy since the late 1980s. He is co-author of numerous books on astronomy and astronomical exercises for use in primary and high schools. The name was suggested by C. E. Koppeschaar.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20070926/MPCPages.arcLast Updated: 2007-09-30

Alternate Designations
 2085 P-L = 1998 KX62 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
FirstGov 2016-Feb-12 22:29 UT
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