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12566 Derichardson (1998 SH54)
Classification: Outer Main-belt Asteroid          SPK-ID: 2012566
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1036026490646022 3.5566e-08  
a 3.208454116573842 1.8367e-08 au
q 2.876049770694564 1.1313e-07 au
i 5.055187454922089 3.7561e-06 deg
node 198.8103129442575 4.3758e-05 deg
peri 286.776160322549 4.7644e-05 deg
M 169.4008272429964 2.1213e-05 deg
tp 2458012.731431945062
(2017-Sep-16.23143195)
0.00012111 TDB
period 2099.143730801817
5.75
1.8025e-05
4.935e-08
d
yr
n .1714984994679186 1.4726e-09 deg/d
Q 3.54085846245312 2.027e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1763  
   data-arc span      15559 days (42.60 yr)  
   first obs. used      1978-03-15  
   last obs. used      2020-10-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50639  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:52:05  

Additional Information
 Earth MOID = 1.89663 au 
 Jupiter MOID = 1.54969 au 
 T_jup = 3.178 
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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 13.3   n/a MPO347624  
diameter diameter 10.552 km 1.188 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.083   0.019 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

12566 Derichardson           Discovered 1998 Sept. 16 by the Lowell Observatory Near-Earth Object Search at the Anderson Mesa Station.
An expert on computational techniques, Derek C. Richardson (b. 1968), of the University of Maryland, has made major contributions to the study of rubble piles, particularly their tidal distortion and their collisions. He is also applying his codes to the formation of planets. The name was suggested by M. F. A'Hearn and P. Michel.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20020724/MPCPages.arcLast Updated: 2003-10-02

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Alternate Designations
 1998 SH54 = 1978 EV9 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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