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11715 Harperclark (1998 HA75)
Classification: Main-belt Asteroid          SPK-ID: 2011715
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07513556319111091 8.9247e-09  
a 2.307023444980465 5.3453e-09 au
q 2.133683939146761 2.2551e-08 au
i 2.190123925472641 6.5654e-07 deg
node 168.3329862628799 2.4009e-05 deg
peri 216.0069280838121 2.6751e-05 deg
M 355.2645464974979 1.226e-05 deg
tp 2459217.335868105911
(2021-Jan-02.83586811)
4.3589e-05 TDB
period 1279.901178403569
3.50
4.4482e-06
1.218e-08
d
yr
n .281271715406209 9.7754e-10 deg/d
Q 2.480362950814169 5.7469e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2367  
   data-arc span      15468 days (42.35 yr)  
   first obs. used      1978-10-08  
   last obs. used      2021-02-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44275  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-16 22:46:44  

Additional Information
 Earth MOID = 1.13589 au 
 Jupiter MOID = 2.81166 au 
 T_jup = 3.582 
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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.27   n/a E2021B10  

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

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