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21670 Kuan (1999 RD11)
Classification: Main-belt Asteroid          SPK-ID: 2021670
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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1250122176433158 2.714e-08  
a 2.271927499536186 5.7643e-09 au
q 1.987908804494334 6.0681e-08 au
i 2.55913558270414 3.387e-06 deg
node 34.92959520670928 6.3854e-05 deg
peri 332.2107466234263 6.5225e-05 deg
M 51.32248959601147 1.3441e-05 deg
tp 2459022.181934545900
(2020-Jun-21.68193455)
4.6561e-05 TDB
period 1250.806499622048
3.42
4.7603e-06
1.303e-08
d
yr
n .2878143022991806 1.0954e-09 deg/d
Q 2.555946194578037 6.4849e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1743  
   data-arc span      8837 days (24.19 yr)  
   first obs. used      1996-11-07  
   last obs. used      2021-01-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49769  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 02:53:54  

Additional Information
 Earth MOID = .985459 au 
 Jupiter MOID = 2.90102 au 
 T_jup = 3.600 
[ 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 15.13   n/a E2021B10  

21670 Kuan           Discovered 1999 Sept. 7 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Aaron Tzeyang Kuan (b. 1987) was awarded second place in the 2005 Intel International Science and Engineering Fair for his environmental sciences project. He attends the Horace Greeley High School, Chappaqua, New York, U.S.A.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20050822/MPCPages.arcLast Updated: 2005-08-26

[ show close-approach data ]
Alternate Designations
 1999 RD11 = 1997 AV21 = 1998 FE72 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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