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18024 Dobson (1999 KK4)
Classification: Main-belt Asteroid          SPK-ID: 2018024
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06652154044028656 3.4744e-08  
a 3.183847919164729 1.6973e-08 au
q 2.972053451054291 1.1322e-07 au
i 9.5536357777354 4.3843e-06 deg
node 182.5419433110456 1.9402e-05 deg
peri 43.15910793307786 3.5298e-05 deg
M 332.5449272325561 2.8553e-05 deg
tp 2459554.751194769759
(2021-Dec-06.25119477)
0.00016453 TDB
period 2075.042036846042
5.68
1.6593e-05
4.543e-08
d
yr
n .1734904612087674 1.3873e-09 deg/d
Q 3.395642387275168 1.8102e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1605  
   data-arc span      10301 days (28.20 yr)  
   first obs. used      1993-03-29  
   last obs. used      2021-06-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52793  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 14:29:38  

Additional Information
 Earth MOID = 1.97335 au 
 Jupiter MOID = 1.58567 au 
 T_jup = 3.174 
[ 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 13.97   n/a MPO636336  
diameter diameter 5.243 km 0.337 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.213   0.029 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18024 Dobson           Discovered 1999 May 20 by J. M. Roe at Oaxaca.
John Dobson (b. 1915) is one of the most important popularizers of astronomy of the twentieth century. His telescope design has spread around the world and enabled amateur astronomers to use larger apertures than before. He demonstrates a passion for sharing his knowledge of the universe with the public at large.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20011101/MPCPages.arcLast Updated: 2009-05-11

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Alternate Designations
 1999 KK4 = 1995 UD27 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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