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359327 (2009 KW21)
Classification: Main-belt Asteroid          SPK-ID: 2359327
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1557741754455592 4.9441e-08  
a 2.771045856378667 2.973e-08 au
q 2.339388472979447 1.3325e-07 au
i 14.42873072091619 5.2288e-06 deg
node 98.71928405695103 2.2368e-05 deg
peri 185.4999081824915 2.8649e-05 deg
M 115.1908151651958 1.9392e-05 deg
tp 2458461.387568008068
(2018-Dec-08.88756801)
8.7643e-05 TDB
period 1684.860683022022
4.61
2.7115e-05
7.424e-08
d
yr
n .2136675178117944 3.4386e-09 deg/d
Q 3.202703239777887 3.4362e-08 au
  Orbit Determination Parameters
   # obs. used (total)      229  
   data-arc span      9859 days (26.99 yr)  
   first obs. used      1992-12-01  
   last obs. used      2019-11-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54871  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-26 00:43:03  

Additional Information
 Earth MOID = 1.3233 au 
 Jupiter MOID = 1.95806 au 
 T_jup = 3.274 
[ 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 16.0   n/a MPO455593  

359327 (2009 KW21)          Discovered 2009-May-29 by Hug, G. at Sandlot
Reference: 20130327/Numbers.arcLast Updated: 2013-03-29

[ show close-approach data ]
Alternate Designations
 2009 KW21 = 2004 HT64 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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