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11715 Harperclark (1998 HA75)
Classification: Main-belt Asteroid          SPK-ID: 2011715
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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07635274234078435 5.6791e-08  
a 2.307068250322943 1.1437e-08 au
q 2.130917262643432 1.2994e-07 au
i 2.18934316827012 6.3107e-06 deg
node 168.4027745646123 0.0001012 deg
peri 216.0891487442577 0.00010623 deg
M 265.2329724757529 3.2718e-05 deg
tp 2457937.433232500440
0.00011691 JED
period 1279.938464558503
n .2812635216210781 2.0916e-09 deg/d
Q 2.483219238002455 1.2311e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1201  
   data-arc span      13391 days (36.66 yr)  
   first obs. used      1978-10-08  
   last obs. used      2015-06-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .4781  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 12:07:39  

Additional Information
 Earth MOID = 1.1332 au 
 Jupiter MOID = 2.81889 au 
 T_jup = 3.582 
[ 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 14.2 mag n/a MPO337357  

11715 Harperclark           Discovered 1998 Apr. 21 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Elizabeth Dee Pauline Harper-Clark (b. 1984) is a finalist in the 2002 Intel International Science and Engineering Fair for her earth and space sciences project. She attends the Presdale School, Ware, Hertfordshire, U.K.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20020724/MPCPages.arcLast Updated: 2003-10-02

[ show close-approach data ]
Alternate Designations
 1998 HA75 = 1978 TU9 = 1985 RC6 = 1991 JY5 = 1997 YX10 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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