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7401 Toynbee (1987 QW7)
Classification: Main-belt Asteroid          SPK-ID: 2007401
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 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1849294876108228 5.2512e-08  
a 2.437401449943234 1.232e-08 AU
q 1.986654048703355 1.2624e-07 AU
i 2.033757808178432 4.9352e-06 deg
node 225.5289994257141 0.00015249 deg
peri 144.2428727728773 0.00015305 deg
M 23.37043511013164 1.2597e-05 deg
tp 2456910.269508723272
(2014-Sep-09.76950872)
4.8623e-05 JED
period 1389.917505024974
3.81
1.0538e-05
2.885e-08
d
yr
n .2590081776065777 1.9637e-09 deg/d
Q 2.888148851183112 1.4598e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1021  
   data-arc span      12388 days (33.92 yr)  
   first obs. used      1980-11-30  
   last obs. used      2014-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49183  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Nov-10 13:04:20  

Additional Information
 Earth MOID = .986638 AU 
 T_jup = 3.479 
[ 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 14.3 mag n/a MPO263415  

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

[ show close-approach data ]
Alternate Designations
 1987 QW7 = 1980 WP2 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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