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21427 Ryanharrison (1998 FK97)
Classification: Main-belt Asteroid          SPK-ID: 2021427
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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1747075093429455 3.4553e-08  
a 2.218991029460591 6.0293e-09 au
q 1.831316633449192 7.8109e-08 au
i 4.12908106508395 2.9016e-06 deg
node 252.1818336368414 5.2058e-05 deg
peri 119.13800721726 5.274e-05 deg
M 175.2908456422001 8.8243e-06 deg
tp 2458808.620275346381
(2019-Nov-21.12027535)
2.8982e-05 TDB
period 1207.345997447528
3.31
4.9207e-06
1.347e-08
d
yr
n .2981746746674793 1.2153e-09 deg/d
Q 2.606665425471989 7.0826e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1609  
   data-arc span      12663 days (34.67 yr)  
   first obs. used      1986-09-11  
   last obs. used      2021-05-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50496  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 18:33:05  

Additional Information
 Earth MOID = .835017 au 
 Jupiter MOID = 2.87631 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 15.04   n/a MPCxxxxx  

21427 Ryanharrison           Discovered 1998 Mar. 31 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Ryan Marques Harrison (b. 1987) is a finalist in the 2005 Intel Science Talent Search, a science competition for high school seniors, for his bioinformatics and genomics project. He attends the Baltimore Polytechnic Institute, Baltimore, Maryland.
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 FK97 = 1986 RP = 2001 AQ16 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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