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JPL Small-Body Database Browser
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20420 Marashwhitman (1998 SN129)
Classification: Main-belt Asteroid          SPK-ID: 2020420
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1094418871678622 4.1923e-08  
a 2.64568940133932 1.2172e-08 au
q 2.356140160396734 1.1441e-07 au
i 1.7172571731673 4.0584e-06 deg
node 156.4857883599758 0.00011584 deg
peri 173.8335388230477 0.00011736 deg
M 319.7341034514972 1.6706e-05 deg
tp 2458776.309195178857
(2019-Oct-19.80919518)
7.2613e-05 TDB
period 1571.834124894005
4.30
1.0847e-05
2.97e-08
d
yr
n .2290318006833426 1.5805e-09 deg/d
Q 2.935238642281907 1.3504e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1121  
   data-arc span      8664 days (23.72 yr)  
   first obs. used      1996-02-12  
   last obs. used      2019-11-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5444  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 00:07:17  

Additional Information
 Earth MOID = 1.34428 au 
 Jupiter MOID = 2.36847 au 
 T_jup = 3.384 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.8   n/a MPO426007  

20420 Marashwhitman           Discovered 1998 Sept. 26 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
David I. Marash-Whitman (b. 1991) is a finalist in the 2004 Discovery Channel Young Scientist Challenge (DCYSC), a middle school science competition, for his environmental sciences project. He attends the South Peninsula Hebrew Day School, Sunnyvale, California.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20041028/MPCPages.arcLast Updated: 2004-10-29

[ show close-approach data ]
Alternate Designations
 1998 SN129 = 2000 AA91 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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