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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1049515632235868 3.4172e-08  
a 2.2349277460734 7.4011e-09 au
q 2.000368585431229 7.7524e-08 au
i 4.506511792978377 4.0816e-06 deg
node 55.4913439167404 4.5675e-05 deg
peri 12.24539744812293 4.9461e-05 deg
M 340.245150347806 1.99e-05 deg
tp 2459067.467623252014
(2020-Aug-05.96762325)
6.7588e-05 TDB
period 1220.375998561319
3.34
6.062e-06
1.66e-08
d
yr
n .2949910522858512 1.4653e-09 deg/d
Q 2.469486906715571 8.1779e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1583  
   data-arc span      17069 days (46.73 yr)  
   first obs. used      1974-02-16  
   last obs. used      2020-11-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48899  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 03:13:24  

Additional Information
 Earth MOID = 1.01443 au 
 Jupiter MOID = 2.76216 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 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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