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20205 Sitanchen (1997 EJ34)
Classification: Main-belt Asteroid          SPK-ID: 2020205
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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .01044864446770113 4.9233e-08  
a 2.716865363693514 1.4181e-08 au
q 2.688477803441669 1.3819e-07 au
i 3.026397623038076 4.717e-06 deg
node 37.70238214864015 7.8741e-05 deg
peri 309.4198353782369 0.00018665 deg
M 269.491279221487 0.00016999 deg
tp 2459611.733540314497
(2022-Feb-01.23354031)
0.00077265 TDB
period 1635.688508685287
4.48
1.2806e-05
3.506e-08
d
yr
n .2200908046296396 1.7231e-09 deg/d
Q 2.745252923945359 1.4329e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1234  
   data-arc span      15577 days (42.65 yr)  
   first obs. used      1977-10-18  
   last obs. used      2020-06-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52649  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:15:03  

Additional Information
 Earth MOID = 1.67886 au 
 Jupiter MOID = 2.26206 au 
 T_jup = 3.358 
[ 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 14.72   n/a E2021B10  
diameter diameter 3.795 km 0.621 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.213   0.103 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20205 Sitanchen           Discovered 1997 Mar. 4 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Sitan Chen (b. 1995) is a finalist in the 2012 Intel Science Talent Search, a science competition for high-school seniors, for his mathematics project. He attends the Northview High School, Duluth, Georgia.
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 EJ34 = 1977 UZ3 = 1999 RR171 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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