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21417 Kelleyharris (1998 FF71)
Classification: Main-belt Asteroid          SPK-ID: 2021417
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09242457333095383 3.6804e-08  
a 2.240181234925294 7.8634e-09 au
q 2.033133440103315 8.1028e-08 au
i 2.38263395703447 3.7133e-06 deg
node 301.3429458122911 0.00010503 deg
peri 295.1644657208928 0.00010755 deg
M 186.7869881777956 2.4549e-05 deg
tp 2459589.752144661327
(2022-Jan-10.25214466)
8.4223e-05 TDB
period 1224.681505427669
3.35
6.4483e-06
1.765e-08
d
yr
n .2939539777521872 1.5477e-09 deg/d
Q 2.447229029747274 8.5902e-09 au
  Orbit Determination Parameters
   # obs. used (total)      957  
   data-arc span      8385 days (22.96 yr)  
   first obs. used      1997-02-03  
   last obs. used      2020-01-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57931  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 23:24:07  

Additional Information
 Earth MOID = 1.02258 au 
 Jupiter MOID = 2.55021 au 
 T_jup = 3.628 
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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 15.7   n/a MPO247545  

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

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Alternate Designations
 1998 FF71 = 1999 TE146 = 1999 US63 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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