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JPL Small-Body Database Browser
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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1046895528685715 3.5541e-08  
a 2.235544607858224 8.0679e-09 au
q 2.0015064424438 8.124e-08 au
i 4.506830036414451 4.1943e-06 deg
node 55.49902542177102 4.7056e-05 deg
peri 12.07612048813925 5.1125e-05 deg
M 222.4074808785307 2.1219e-05 deg
tp 2459067.122588362371
(2020-Aug-05.62258836)
7.31e-05 TDB
period 1220.881286882712
3.34
6.6091e-06
1.809e-08
d
yr
n .294868963811536 1.5962e-09 deg/d
Q 2.469582773272648 8.9125e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1496  
   data-arc span      16695 days (45.71 yr)  
   first obs. used      1974-02-16  
   last obs. used      2019-11-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48893  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 00:06:41  

Additional Information
 Earth MOID = 1.01525 au 
 Jupiter MOID = 2.76355 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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