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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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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 
[ show covariance matrix ]

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

[ show close-approach data ]
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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