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91199 Johngray (1998 SS147)
Classification: Outer Main-belt Asteroid          SPK-ID: 2091199
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06252214136278625 8.9454e-08  
a 3.23335937878127 4.8776e-08 au
q 3.031202826624417 2.8686e-07 au
i 22.09991187914524 8.9311e-06 deg
node 31.58233014755655 1.7841e-05 deg
peri 167.5143605768789 5.7708e-05 deg
M 180.1100748369319 5.4089e-05 deg
tp 2458461.666995537108
(2018-Dec-09.16699554)
0.00032188 JED
period 2123.632649505314
5.81
4.8053e-05
1.316e-07
d
yr
n .1695208444284653 3.8359e-09 deg/d
Q 3.435515930938124 5.1826e-08 au
  Orbit Determination Parameters
   # obs. used (total)      642  
   data-arc span      6284 days (17.20 yr)  
   first obs. used      1998-09-18  
   last obs. used      2015-12-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .58504  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 16:26:49  

Additional Information
 Earth MOID = 2.02898 au 
 Jupiter MOID = 1.52811 au 
 T_jup = 3.067 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.3 mag n/a MPO266324  

91199 Johngray           Discovered 1998 Sept. 20 by E. W. Elst at the European Southern Observatory.
British philosopher John Gray (b. 1948) considers morality to be an illusion and mankind a rapacious species engaged in wiping out other forms of life while destroying its natural environment.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20080618/MPCPages.arcLast Updated: 2008-06-20

[ show close-approach data ]
Alternate Designations
 1998 SS147 = 2001 DX21 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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