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7973 Koppeschaar (1344 T-2)
Classification: Main-belt Asteroid          SPK-ID: 2007973
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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08842745472735365 5.8641e-08  
a 2.86836519461533 2.622e-08 AU
q 2.614722961226966 1.7043e-07 AU
i 2.32693968999314 7.5689e-06 deg
node 137.7241064038528 0.00015739 deg
peri 315.4728001313852 0.00016857 deg
M 91.15439805239505 5.5051e-05 deg
tp 2456551.211585724445
(2013-Sep-15.71158572)
0.00027344 JED
period 1774.394133415597
4.86
2.433e-05
6.661e-08
d
yr
n .2028861532060087 2.7819e-09 deg/d
Q 3.122007428003694 2.8538e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      765  
   data-arc span      23127 days (63.32 yr)  
   first obs. used      1951-02-04  
   last obs. used      2014-05-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53779  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-16 13:38:43  

Additional Information
 Earth MOID = 1.63182 AU 
 T_jup = 3.292 
[ 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 14.0 mag n/a MPO279599  

7973 Koppeschaar           Discovered 1973 Sept. 29 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels.
Carl Egon Koppeschaar is a science writer and reporter in the Netherlands. He is internationally known for popularizing astrophysics and space science, for debunking pseudoscience, and for taking action against light pollution. His Moon Handbook: a 21st-Century Travel Guide is a delight.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20000124/MPCPages.arcLast Updated: 2013-03-29

Alternate Designations
 1344 T-2 = 1990 EO5 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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