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249503 (2009 YW20)
Classification: Main-belt Asteroid          SPK-ID: 2249503
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 .0897837644778398 6.9694e-08  
a 3.196814059024156 4.0131e-08 au
q 2.909792058469285 2.2523e-07 au
i 8.5545297704044 7.134e-06 deg
node 317.3141462117393 3.484e-05 deg
peri 195.798946200081 4.5524e-05 deg
M 258.3473313718998 3.016e-05 deg
tp 2459590.009455305398
(2022-Jan-10.50945531)
0.00017987 TDB
period 2087.730767663068
5.72
3.9312e-05
1.076e-07
d
yr
n .1724360274687005 3.247e-09 deg/d
Q 3.483836059579029 4.3734e-08 au
  Orbit Determination Parameters
   # obs. used (total)      238  
   data-arc span      9769 days (26.75 yr)  
   first obs. used      1993-01-26  
   last obs. used      2019-10-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54649  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-08 02:46:30  

Additional Information
 Earth MOID = 1.92169 au 
 Jupiter MOID = 1.54246 au 
 T_jup = 3.172 
[ 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 15.5   n/a MPO454850  
diameter diameter 4.283 km 0.621 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.073   0.020 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

249503 (2009 YW20)          Discovered 2009-Dec-27 by Spacewatch at Kitt Peak
Reference: 20100824/Numbers.arcLast Updated: 2010-08-27

[ show close-approach data ]
Alternate Designations
 2009 YW20 = 2008 YL3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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