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216643 (2003 KW9)
Classification: Main-belt Asteroid          SPK-ID: 2216643
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 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1999893011746399 6.9598e-08  
a 3.198582434533734 4.3142e-08 au
q 2.558900168701855 2.4281e-07 au
i 16.19191765992079 8.2179e-06 deg
node 237.2956818123007 2.1503e-05 deg
peri 32.95935912859723 3.0563e-05 deg
M 352.9576450068715 2.5192e-05 deg
tp 2459241.374284299221
(2021-Jan-26.87428430)
0.00014646 TDB
period 2089.463306248717
5.72
4.2273e-05
1.157e-07
d
yr
n .1722930471778995 3.4858e-09 deg/d
Q 3.838264700365614 5.1769e-08 au
  Orbit Determination Parameters
   # obs. used (total)      251  
   data-arc span      6234 days (17.07 yr)  
   first obs. used      2003-04-28  
   last obs. used      2020-05-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .6196  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 23:55:40  

Additional Information
 Earth MOID = 1.55736 au 
 Jupiter MOID = 1.29521 au 
 T_jup = 3.102 
[ 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 15.27   n/a E2021B55  
diameter diameter 4.666 km 0.112 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.074   0.018 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

216643 (2003 KW9)          Discovered 2003-May-26 by NEAT at Haleakala
Reference: 20090707/Numbers.arcLast Updated: 2009-07-09

[ show close-approach data ]
Alternate Designations
 2003 KW9 = 2004 RM207 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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