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21503 Beksha (1998 KL18)
Classification: Main-belt Asteroid          SPK-ID: 2021503
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1104870025220527 4.5844e-08  
a 2.533412766723386 1.0299e-08 au
q 2.253503583977019 1.1753e-07 au
i 5.329344113907225 4.7522e-06 deg
node 28.82862633729176 3.6744e-05 deg
peri 175.6199911789455 4.0335e-05 deg
M 285.8388056454535 1.7636e-05 deg
tp 2459699.911175955647
(2022-Apr-30.41117596)
7.3161e-05 TDB
period 1472.846065852719
4.03
8.9815e-06
2.459e-08
d
yr
n .2444247286572846 1.4905e-09 deg/d
Q 2.813321949469753 1.1437e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1080  
   data-arc span      9307 days (25.48 yr)  
   first obs. used      1995-08-26  
   last obs. used      2021-02-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51581  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:46:32  

Additional Information
 Earth MOID = 1.25025 au 
 Jupiter MOID = 2.14228 au 
 T_jup = 3.435 
[ 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 14.91   n/a MPCxxxxx  
diameter diameter 2.643 km 0.447 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.364   0.142 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21503 Beksha           Discovered 1998 May 22 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Daniel B. Beksha, II (b. 1986) was awarded first place in the 2005 Intel International Science and Engineering Fair for his mathematics team project. He attends the Bishop Feehan High School, Attleboro, Massachusetts, U.S.A.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20050822/MPCPages.arcLast Updated: 2005-08-26

[ show close-approach data ]
Alternate Designations
 1998 KL18 = 1999 RB77 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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