Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
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 ]

[ hide orbit diagram ]

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.


[ revert to old Java-based viewer ]

Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07533372257171507 3.5329e-08  
a 2.307745297223389 5.5466e-09 au
q 2.133894253236182 8.2776e-08 au
i 2.189712390786994 3.898e-06 deg
node 168.335030871984 6.4024e-05 deg
peri 215.8250257426981 6.6776e-05 deg
M 299.1956681042834 1.8804e-05 deg
tp 2459216.777957222609
(2021-Jan-02.27795722)
6.6961e-05 TDB
period 1280.501934198938
3.51
4.6165e-06
1.264e-08
d
yr
n .2811397549549275 1.0136e-09 deg/d
Q 2.481596341210595 5.9645e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2153  
   data-arc span      15357 days (42.05 yr)  
   first obs. used      1978-10-08  
   last obs. used      2020-10-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44314  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:57:45  

Additional Information
 Earth MOID = 1.13739 au 
 Jupiter MOID = 2.81256 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 14.2   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 | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Nov-28 17:47 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin