Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1090828020637934 4.0336e-08  
a 2.644660317433952 1.1764e-08 au
q 2.356173359501335 1.0959e-07 au
i 1.717511027574029 4.0013e-06 deg
node 156.4789270309941 0.00011578 deg
peri 173.9776778548919 0.00011724 deg
M 51.26415747195523 1.6422e-05 deg
tp 2458776.800713758727
(2019-Oct-20.30071376)
7.2017e-05 TDB
period 1570.9171284228
4.30
1.0482e-05
2.87e-08
d
yr
n .2291654941476384 1.5291e-09 deg/d
Q 2.933147275366569 1.3048e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1171  
   data-arc span      9041 days (24.75 yr)  
   first obs. used      1996-02-12  
   last obs. used      2020-11-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53516  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 03:13:44  

Additional Information
 Earth MOID = 1.34524 au 
 Jupiter MOID = 2.37254 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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Jan-23 12:14 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin