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21128 Chapuis (1993 BJ5)
Classification: Outer Main-belt Asteroid          SPK-ID: 2021128
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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1002544610926833 7.7577e-08  
a 3.977439940609955 8.7917e-08 AU
q 3.57868384283559 2.9542e-07 AU
i 7.883988262084079 8.7468e-06 deg
node 317.5281507275907 5.8804e-05 deg
peri 272.5278281433127 7.966e-05 deg
M 186.2172348021533 5.9732e-05 deg
tp 2458399.146861806069
0.00049983 JED
period 2897.369423699466
n .124250638201441 4.1196e-09 deg/d
Q 4.37619603838432 9.6731e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      873  
   data-arc span      13776 days (37.72 yr)  
   first obs. used      1977-02-12  
   last obs. used      2014-11-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51308  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Nov-10 13:37:58  

Additional Information
 Earth MOID = 2.58306 AU 
 T_jup = 3.032 
[ 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 12.0 mag n/a MPO284317  

21128 Chapuis           Discovered 1993 Jan. 27 by E. W. Elst at Caussols.
Grégoire Chapuis (1761-1794) was a surgeon dedicated to educating the poor by establishing evening classes. As mayor of the city of Verviers, he promoted civil weddings. He was therefore accused of blasphemy by the prince-archbishop of Liège and put to death by beheading.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20041126/MPCPages.arcLast Updated: 2004-12-06

[ show close-approach data ]
Alternate Designations
 1993 BJ5 = 1977 CO = 1999 XH193 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
FirstGov 2014-Nov-23 05:52 UT
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