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20474 Reasoner (1999 NV9)
Classification: Main-belt Asteroid          SPK-ID: 2020474
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1291553029963081 3.4274e-08  
a 2.270940132753804 6.5261e-09 au
q 1.97763617182151 7.6581e-08 au
i 7.4805531720346 2.7849e-06 deg
node 138.1734156297663 2.8074e-05 deg
peri 49.5349523569751 3.0302e-05 deg
M 203.8693863519963 1.2459e-05 deg
tp 2459742.616368937552
(2022-Jun-12.11636894)
4.4241e-05 TDB
period 1249.991198122817
3.42
5.3883e-06
1.475e-08
d
yr
n .288002027966783 1.2415e-09 deg/d
Q 2.564244093686098 7.369e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1713  
   data-arc span      10984 days (30.07 yr)  
   first obs. used      1991-01-16  
   last obs. used      2021-02-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47811  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:21:58  

Additional Information
 Earth MOID = .98854 au 
 Jupiter MOID = 2.40573 au 
 T_jup = 3.590 
[ 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 15.10   n/a E2021B10  
diameter diameter 2.780 km 0.395 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.251   0.141 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

20474 Reasoner           Discovered 1999 July 13 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Jonathan William Reasoner (b. 1992) is a finalist in the 2004 Discovery Channel Young Scientist Challenge (DCYSC), a middle school science competition, for his behavioral science project. He attends the Harelson Elementary School, Tucson, Arizona.
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
 1999 NV9 = 1998 GG10 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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