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20323 Tomlindstom (1998 HC21)
Classification: Main-belt Asteroid          SPK-ID: 2020323
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1051101251298068 3.0665e-08  
a 2.235317704178992 6.2687e-09 au
q 2.000363180587865 6.8017e-08 au
i 4.506181008238035 3.476e-06 deg
node 55.48936816324139 4.3787e-05 deg
peri 12.23333220495446 4.7163e-05 deg
M 39.24391413710519 1.7608e-05 deg
tp 2459067.430927543170
(2020-Aug-05.93092754)
5.9602e-05 TDB
period 1220.695415780775
3.34
5.1349e-06
1.406e-08
d
yr
n .2949138624967628 1.2406e-09 deg/d
Q 2.470272227770118 6.9276e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1797  
   data-arc span      17193 days (47.07 yr)  
   first obs. used      1974-02-16  
   last obs. used      2021-03-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .465  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:17:08  

Additional Information
 Earth MOID = 1.01382 au 
 Jupiter MOID = 2.76144 au 
 T_jup = 3.627 
[ 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 14.7   n/a MPO337430  

20323 Tomlindstom           Discovered 1998 Apr. 20 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Tom Lindstom mentored a finalist in the 2004 Intel Science Talent Search, a science competition for high school seniors. He teaches at the Clovis West High School, Fresno, California.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20040415/MPCPages.arcLast Updated: 2004-04-20

Alternate Designations
 1998 HC21 = 1974 DJ2 = 1999 NA40 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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