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20218 Dukewriter (1997 GT34)
Classification: Main-belt Asteroid          SPK-ID: 2020218
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1236453224466214 3.6233e-08  
a 3.038282937515859 1.753e-08 au
q 2.662613464022643 1.0633e-07 au
i .8922796708748456 2.9428e-06 deg
node 91.12175080131421 0.00028432 deg
peri 132.128826544712 0.00028474 deg
M 144.4425233851888 1.7147e-05 deg
tp 2458424.372065249163
(2018-Nov-01.87206525)
8.9328e-05 TDB
period 1934.375348492089
5.30
1.6741e-05
4.583e-08
d
yr
n .186106590057939 1.6107e-09 deg/d
Q 3.413952411009076 1.9698e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1282  
   data-arc span      9595 days (26.27 yr)  
   first obs. used      1994-10-26  
   last obs. used      2021-02-01  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53423  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:15:15  

Additional Information
 Earth MOID = 1.65276 au 
 Jupiter MOID = 1.56152 au 
 T_jup = 3.229 
[ 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 14.3   n/a MPO302189  
diameter diameter 5.669 km 0.868 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.115   0.062 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

20218 Dukewriter           Discovered 1997 Apr. 3 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Duke Writer mentored a finalist in the 2012 Intel Science Talent Search, a science competition for high-school seniors. He teaches at the Loudoun County Academy of Science, Sterling, Virginia.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20120506/MPCPages.arcLast Updated: 2012-05-09

[ show close-approach data ]
Alternate Designations
 1997 GT34 = 1998 MH16 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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