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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 ]

[ show orbit diagram ]
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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457347.5 (2015-Nov-21.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09225097022422747 2.9894e-08  
q 2.033571391074274 6.7565e-08 au
tp 2457141.168632767043
(2015-Apr-28.66863277)
8.1345e-05 TDB
node 301.4044573633047 8.4686e-05 deg
peri 295.342240116949 8.7721e-05 deg
i 2.381913408280314 3.6602e-06 deg
  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
 Jupiter MOID = 2.54828 au 
 T_jup = 3.628 
Orbit Covariance (6×6)
  e q tp node peri i
e 8.936685882575148E-16 -2.011263230040565E-15 -2.835892767807903E-13 2.065759461989922E-15 -7.761342103236446E-14 3.657396165704755E-16
q -2.011263230040565E-15 4.564969967190922E-15 7.250947855948211E-13 -5.292090479438474E-15 2.00309772389316E-13 -7.861382624137533E-16
tp -2.835892767807903E-13 7.250947855948211E-13 6.617030989694699E-9 3.05557713629399E-12 1.871875711473581E-9 -5.575741985615439E-13
node 2.065759461989922E-15 -5.292090479438474E-15 3.05557713629399E-12 7.171731450083949E-9 -7.164341205340433E-9 4.64474222031903E-11
peri -7.761342103236446E-14 2.00309772389316E-13 1.871875711473581E-9 -7.164341205340433E-9 7.694965723183121E-9 -4.657100246128621E-11
i 3.657396165704755E-16 -7.861382624137533E-16 -5.575741985615439E-13 4.64474222031903E-11 -4.657100246128621E-11 1.339698824103299E-11

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 ]
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