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12125 Jamesjones (1999 RS4)
Classification: Main-belt Asteroid          SPK-ID: 2012125
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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .194609062810629 5.2781e-08  
a 3.098304721022704 3.4322e-08 AU
q 2.495346542962728 1.7478e-07 AU
i .2156798255800624 5.5592e-06 deg
node 71.74305581949793 0.0016383 deg
peri 234.3401190443421 0.0016385 deg
M 275.4642970217275 2.2473e-05 deg
tp 2457268.259145816134
(2015-Sep-02.75914582)
0.00012835 JED
period 1991.978377906064
5.45
3.31e-05
9.062e-08
d
yr
n .1807248532378279 3.003e-09 deg/d
Q 3.70126289908268 4.1001e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1033  
   data-arc span      13007 days (35.61 yr)  
   first obs. used      1978-11-05  
   last obs. used      2014-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52791  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jul-14 12:27:41  

Additional Information
 Earth MOID = 1.47948 AU 
 T_jup = 3.193 
[ 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 13.4 mag n/a MPO263458  

12125 Jamesjones           Discovered 1999 Sept. 3 by Spacewatch at Kitt Peak.
James Jones (b. 1939) studied at Sheffield University in Yorkshire and has been professor of physics at the University of Western Ontario since 1966. Jones pioneered the video observation of meteors and single-station radar radiant mapping.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20020328/MPCPages.arcLast Updated: 2003-10-02

[ show close-approach data ]
Alternate Designations
 1999 RS4 = 1978 VF10 = 1978 WH13 = 1998 KX18 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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