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21517 Dobi (1998 KS52)
Classification: Main-belt Asteroid          SPK-ID: 2021517
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1820901709181331 3.5571e-08  
a 2.356598906565338 9.0542e-09 au
q 1.92748540888337 8.1981e-08 au
i 7.73885831926894 3.4137e-06 deg
node 156.7246079342453 2.8338e-05 deg
peri 35.53355454865715 2.9673e-05 deg
M 122.2487556733549 1.0157e-05 deg
tp 2458751.786763229334
(2019-Sep-25.28676323)
3.6305e-05 TDB
period 1321.377582517577
3.62
7.6152e-06
2.085e-08
d
yr
n .2724429449711898 1.5701e-09 deg/d
Q 2.785712404247306 1.0703e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1567  
   data-arc span      8739 days (23.93 yr)  
   first obs. used      1996-12-05  
   last obs. used      2020-11-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49027  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 19:13:24  

Additional Information
 Earth MOID = .933485 au 
 Jupiter MOID = 2.17705 au 
 T_jup = 3.519 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.82   n/a E2021B10  
diameter diameter 3.287 km 0.604 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.259   0.068 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21517 Dobi           Discovered 1998 May 23 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Kledin Dobi (b. 1988) was awarded first place and Best in Category in the 2005 Intel International Science and Engineering Fair for his mathematics project. He attends the Julia R. Masterman High School, Philadelphia, Pennsylvania, 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

Alternate Designations
 1998 KS52 = 1996 XG4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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