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20532 Benbilby (1999 RL64)
Classification: Main-belt Asteroid          SPK-ID: 2020532
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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09665455501894256 3.3569e-08  
a 2.537498316715288 1.1377e-08 au
q 2.292237546051856 8.8634e-08 au
i 3.718256132081586 3.5789e-06 deg
node 48.66053982600701 6.2977e-05 deg
peri 6.182878543920485 6.7197e-05 deg
M 338.67699533458 2.5547e-05 deg
tp 2459087.948622391224
(2020-Aug-26.44862239)
0.00010492 TDB
period 1476.410316220354
4.04
9.929e-06
2.718e-08
d
yr
n .2438346549363112 1.6398e-09 deg/d
Q 2.782759087378721 1.2476e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1362  
   data-arc span      15591 days (42.69 yr)  
   first obs. used      1977-03-12  
   last obs. used      2019-11-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50219  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 01:21:21  

Additional Information
 Earth MOID = 1.30364 au 
 Jupiter MOID = 2.50481 au 
 T_jup = 3.438 
[ 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 14.2   n/a MPO502321  
diameter diameter 3.649 km 0.603 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.253   0.092 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20532 Benbilby           Discovered 1999 Sept. 7 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
R. Ben Bilby mentored a finalist in the 2004 Discovery Channel Youth Science Challenge (DCYSC), a middle school science competition. He teaches at the C.W. Ruckel Middle School, Niceville, Florida.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20041028/MPCPages.arcLast Updated: 2004-10-29

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Alternate Designations
 1999 RL64 = 1977 EE3 = 1998 KF24 = 2010 PQ81 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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