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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09685375753090418 3.209e-08  
a 2.538065396101706 1.0242e-08 au
q 2.292244225630093 8.3617e-08 au
i 3.717947658824937 3.5058e-06 deg
node 48.65959695177438 6.0677e-05 deg
peri 6.188016602601453 6.4301e-05 deg
M 27.43124757201278 2.2277e-05 deg
tp 2459087.962905616242
(2020-Aug-26.46290562)
9.1358e-05 TDB
period 1476.905265493191
4.04
8.9401e-06
2.448e-08
d
yr
n .2437529396171415 1.4755e-09 deg/d
Q 2.783886566573319 1.1234e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1563  
   data-arc span      16070 days (44.00 yr)  
   first obs. used      1977-03-12  
   last obs. used      2021-03-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47728  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:23:26  

Additional Information
 Earth MOID = 1.30286 au 
 Jupiter MOID = 2.50398 au 
 T_jup = 3.437 
[ 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 14.19   n/a E2021B10  
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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