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7401 Toynbee (1987 QW7)
Classification: Main-belt Asteroid          SPK-ID: 2007401
[ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB
Reference: JPL 1 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1852785758571688 6.1269e-08  
a 2.437768315824189 1.3987e-08 AU
q 1.986102073998554 1.5078e-07 AU
i 2.033819563987872 5.0585e-06 deg
node 225.539379815247 0.00021381 deg
peri 144.2341416513879 0.00021438 deg
M 228.0181809205286 2.0804e-05 deg
tp 2456910.181274616352
(2014-Sep-09.68127462)		 8.2233e-05 JED
period 1390.231322326319
3.81		 1.1965e-05
3.276e-08		 d
yr
n .2589497116189271 2.2286e-09 deg/d
Q 2.889434557649824 1.6578e-08 AU
   Orbit Determination Parameters
   # obs. used (total)      905  
   data-arc span      11831 days (32.39 yr)  
   first obs. used      1980-11-30  
   last obs. used      2013-04-22  
   planetary ephem.      DE405  
   SB-pert. ephem.      SB405-CPV-2  
   condition code      0  
   fit RMS      .55013  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Apr-29 13:26:10  

Additional Information
 Earth MOID = .985499 AU 
 T_jup = 3.479 
[ show covariance matrix ]

[ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.2 mag n/a PDS3 (MPC 28826)  

7401 Toynbee           Discovered 1987 Aug. 21 by E. W. Elst at the European Southern Observatory.
In his twelve-volume work A Study of History (1934-1961), renowned British historian Arnold J. Toynbee (1889-1975) analyzed the rise and fall of civilizations.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20071124/MPCPages.arcLast Updated: 2007-11-26

Alternate Designations
 1987 QW7 = 1980 WP2 
[ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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