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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06226336586725274 1.0174e-07  
a 3.233879311174773 5.6985e-08 AU
q 3.032527100452559 3.4105e-07 AU
i 22.09592974645211 9.108e-06 deg
node 31.59273162377011 1.917e-05 deg
peri 167.4216119885652 7.5815e-05 deg
M 112.4187121920225 6.7009e-05 deg
tp 2456337.184350042688
(2013-Feb-13.68435004)
0.00040045 JED
period 2124.144898375536
5.82
5.6145e-05
1.537e-07
d
yr
n .1694799635727836 4.4796e-09 deg/d
Q 3.435231521896987 6.0533e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      547  
   data-arc span      5407 days (14.80 yr)  
   first obs. used      1998-09-18  
   last obs. used      2013-07-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5733  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-10 17:56:18  

Additional Information
 Earth MOID = 2.0321 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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