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21747 Justsolomon (1999 RD170)
Classification: Main-belt Asteroid          SPK-ID: 2021747
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1912888049612706 2.921e-08  
a 2.720375443928321 1.1575e-08 au
q 2.199998076213286 7.96e-08 au
i 2.23912879566003 4.0894e-06 deg
node 198.9380290828173 8.7498e-05 deg
peri 250.721886961371 8.823e-05 deg
M 235.5196165556697 1.2243e-05 deg
tp 2459963.182906130302
(2023-Jan-18.68290613)
5.7846e-05 TDB
period 1638.859397457941
4.49
1.046e-05
2.864e-08
d
yr
n .2196649697700737 1.402e-09 deg/d
Q 3.240752811643356 1.379e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1296  
   data-arc span      12676 days (34.70 yr)  
   first obs. used      1986-11-25  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5247  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 22:45:14  

Additional Information
 Earth MOID = 1.21777 au 
 Jupiter MOID = 1.97577 au 
 T_jup = 3.331 
[ 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 14.75   n/a MPO636390  
diameter diameter 5.892 km 0.229 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.081   0.017 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21747 Justsolomon           Discovered 1999 Sept. 9 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Justin Moore Solomon (b. 1987) was awarded first place in the 2005 Intel International Science and Engineering Fair for his computer science project. He attends the Thomas Jefferson High School for Science and Technology, Alexandria, Virginia, 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

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Alternate Designations
 1999 RD170 = 1986 WD4 = 1997 EY46 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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