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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09266073739845106 3.701e-08  
a 2.239919797853788 7.9606e-09 au
q 2.032367177671267 8.1619e-08 au
i 2.382580556424388 3.7947e-06 deg
node 301.346062318989 0.00010511 deg
peri 295.144135094423 0.00010764 deg
M 69.19462516548354 2.4397e-05 deg
tp 2458365.148489665722
(2018-Sep-03.64848967)
8.2763e-05 TDB
period 1224.467124689395
3.35
6.5276e-06
1.787e-08
d
yr
n .2940054434628611 1.5673e-09 deg/d
Q 2.44747241803631 8.6983e-09 au
  Orbit Determination Parameters
   # obs. used (total)      938  
   data-arc span      8302 days (22.73 yr)  
   first obs. used      1997-02-03  
   last obs. used      2019-10-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5784  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 04:27:51  

Additional Information
 Earth MOID = 1.02173 au 
 Jupiter MOID = 2.55062 au 
 T_jup = 3.628 
[ 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 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

[ show close-approach data ]
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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