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

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06475065438313501 5.7068e-08  
a 3.235799649007629 2.7628e-08 au
q 3.026279504281666 1.865e-07 au
i 22.06693847686138 5.5947e-06 deg
node 31.4661498864652 1.296e-05 deg
peri 168.4172385929371 4.6488e-05 deg
M 90.53581884552115 4.1664e-05 deg
tp 2458465.826333025690
(2018-Dec-13.32633303)
0.00024706 TDB
period 2126.037214499372
5.82
2.7229e-05
7.455e-08
d
yr
n .1693291150055296 2.1687e-09 deg/d
Q 3.445319793733591 2.9417e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1625  
   data-arc span      7619 days (20.86 yr)  
   first obs. used      1998-09-18  
   last obs. used      2019-07-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44532  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 22:25:09  

Additional Information
 Earth MOID = 2.02406 au 
 Jupiter MOID = 1.5181 au 
 T_jup = 3.067 
[ 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 13.3   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 | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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