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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 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07513556194534747 8.9246e-09  
a 2.307023443645953 5.345e-09 au
q 2.133683940786524 2.255e-08 au
i 2.190123888329657 6.5654e-07 deg
node 168.3329862216321 2.4009e-05 deg
peri 216.0069278577989 2.675e-05 deg
M 355.26454658691 1.2258e-05 deg
tp 2459217.335867773417
(2021-Jan-02.83586777)
4.3584e-05 TDB
period 1279.901177293018
3.50
4.448e-06
1.218e-08
d
yr
n .281271715650264 9.7749e-10 deg/d
Q 2.480362946505382 5.7466e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2372  
   data-arc span      15491 days (42.41 yr)  
   first obs. used      1978-10-08  
   last obs. used      2021-03-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44227  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 22:55:35  

Additional Information
 Earth MOID = 1.13589 au 
 Jupiter MOID = 2.81166 au 
 T_jup = 3.582 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457377.5 (2015-Dec-21.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07630355020938885 8.9277e-09  
q 2.130959401527869 2.2579e-08 au
tp 2457937.677837022716
(2017-Jul-03.17783702)
4.2896e-05 TDB
node 168.4030670673706 2.4025e-05 deg
peri 216.1530784802055 2.6684e-05 deg
i 2.189321498411149 6.5649e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2372  
   data-arc span      15491 days (42.41 yr)  
   first obs. used      1978-10-08  
   last obs. used      2021-03-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44227  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 22:55:35  

Additional Information
 Jupiter MOID = 2.81166 au 
 T_jup = 3.582 
Orbit Covariance (6×6)
  e q tp node peri i
e 7.970307145581662E-17 -1.971335776127343E-16 -2.684703477164135E-14 6.291439862388874E-14 -6.883250942593898E-14 1.064382667704201E-15
q -1.971335776127343E-16 5.098101562419205E-16 4.962661890196982E-14 -1.463096962734842E-13 1.539180067181644E-13 -2.432418751547901E-15
tp -2.684703477164135E-14 4.962661890196982E-14 1.840083137583969E-9 -2.652573550481661E-11 5.142995005600614E-10 -1.875662356935371E-12
node 6.291439862388874E-14 -1.463096962734842E-13 -2.652573550481661E-11 5.772172823856901E-10 -5.795080601580635E-10 1.273895765440253E-12
peri -6.883250942593898E-14 1.539180067181644E-13 5.142995005600614E-10 -5.795080601580635E-10 7.120122556121627E-10 -1.68545848958342E-12
i 1.064382667704201E-15 -2.432418751547901E-15 -1.875662356935371E-12 1.273895765440253E-12 -1.68545848958342E-12 4.309728705495604E-13

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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