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128177 Griffioen (2003 RA11)
Classification: Main-belt Asteroid          SPK-ID: 2128177
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02952225315698875 8.2969e-08  
a 2.876741416352449 5.0588e-08 au
q 2.791813527991697 2.185e-07 au
i 7.53937173378932 1.0744e-05 deg
node 173.6094448706715 5.5271e-05 deg
peri 119.3522892357765 0.00019148 deg
M 234.5318703188535 0.00018395 deg
tp 2458021.627258787973
0.00091489 JED
period 1782.17220366576
n .2020006816734735 5.3284e-09 deg/d
Q 2.9616693047132 5.2082e-08 au
  Orbit Determination Parameters
   # obs. used (total)      302  
   data-arc span      4641 days (12.71 yr)  
   first obs. used      2002-05-04  
   last obs. used      2015-01-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .65244  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Mar-09 19:14:13  

Additional Information
 Earth MOID = 1.78391 au 
 Jupiter MOID = 2.08948 au 
 T_jup = 3.282 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.7 mag n/a MPO270639  

128177 Griffioen           Discovered 2003 Sept. 5 by A. Vanden Heuvel at the Calvin College Observatory.
Roger Griffioen (b. 1934) served 37 years at Calvin College, including seven years as academic dean and 17 years as physics chair. He built a high-quality physics program, implemented the construction of a college observatory and played a formative role in the lives of many students.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20060613/MPCPages.arcLast Updated: 2008-05-22

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
FirstGov 2016-Feb-12 18:13 UT
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