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9882 Stallman (1994 SS9)
Classification: Main-belt Asteroid          SPK-ID: 2009882
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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .182329742529053 6.0408e-08  
a 2.393112176211873 1.7454e-08 au
q 1.95677664928002 1.4915e-07 au
i .9916118637054245 6.9179e-06 deg
node 148.7734684448854 0.00033841 deg
peri 157.2038249700218 0.00033919 deg
M 8.602528400010717 2.4646e-05 deg
tp 2457568.187792739170
9.2367e-05 JED
period 1352.206476166267
n .2662315307205603 2.9127e-09 deg/d
Q 2.829447703143726 2.0637e-08 au
  Orbit Determination Parameters
   # obs. used (total)      578  
   data-arc span      13011 days (35.62 yr)  
   first obs. used      1979-08-26  
   last obs. used      2015-04-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .57907  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 16:06:52  

Additional Information
 Earth MOID = .9414 au 
 Jupiter MOID = 2.4028 au 
 T_jup = 3.508 
[ 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 15.8 mag n/a MPO250308  

9882 Stallman           Discovered 1994 Sept. 28 by Spacewatch at Kitt Peak.
Richard Stallman (b. 1953) is the founder of the GNU project and an advocate and developer of free software. He created the GNU system of tools, which made possible the GNU/Linux operating system. This operating system is used by several minor-planet surveys for data collection and analysis.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20001111/MPCPages.arcLast Updated: 2013-03-29

[ show close-approach data ]
Alternate Designations
 1994 SS9 = 1979 QV4 = 1997 HE18 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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