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

Significant website upgrade scheduled for September 27. More details available here.

JPL Small-Body Database Browser
Search: [ help ]  
21417 Kelleyharris (1998 FF71)
Classification: Main-belt Asteroid          SPK-ID: 2021417
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ 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.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09216752691572762 2.9896e-08  
a 2.240372646381152 6.8758e-09 au
q 2.033883040194558 6.7577e-08 au
i 2.382441338358019 3.6606e-06 deg
node 301.3423343249253 8.4651e-05 deg
peri 295.187608947818 8.7688e-05 deg
M 303.1340993411311 2.4654e-05 deg
tp 2459589.976508051297
(2022-Jan-10.47650805)
8.4155e-05 TDB
period 1224.838472466963
3.35
5.6386e-06
1.544e-08
d
yr
n .2939163065925903 1.3531e-09 deg/d
Q 2.446862252567747 7.5095e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1158  
   data-arc span      8832 days (24.18 yr)  
   first obs. used      1997-02-03  
   last obs. used      2021-04-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54088  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 18:33:01  

Additional Information
 Earth MOID = 1.02366 au 
 Jupiter MOID = 2.54828 au 
 T_jup = 3.628 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.76   n/a MPCxxxxx  

21417 Kelleyharris           Discovered 1998 Mar. 20 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Kelley Harris (b. 1987) is a finalist in the 2005 Intel Science Talent Search, a science competition for high school seniors, for her biochemistry project. She attends the C. K. McClatchy High School, Sacramento, California.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20050224/MPCPages.arcLast Updated: 2005-02-28

Alternate Designations
 1998 FF71 = 1999 TE146 = 1999 US63 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Sep-24 22:43 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin