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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 ]

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Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1848183267186402 5.1055e-08  
a 2.438942885363803 1.1876e-08 au
q 1.988181542328533 1.2195e-07 au
i 2.033569933068414 4.7752e-06 deg
node 225.4665222215789 0.00013689 deg
peri 144.520755346173 0.00013746 deg
M 126.7171767445314 1.1715e-05 deg
tp 2456910.795765149686
(2014-Sep-10.29576515)
4.5323e-05 JED
period 1391.236208659621
3.81
1.0162e-05
2.782e-08
d
yr
n .258762672908607 1.8901e-09 deg/d
Q 2.889704228399073 1.4071e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1256  
   data-arc span      12801 days (35.05 yr)  
   first obs. used      1980-11-30  
   last obs. used      2015-12-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49956  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 13:03:37  

Additional Information
 Earth MOID = .986425 au 
 Jupiter MOID = 2.57197 au 
 T_jup = 3.478 
[ 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 14.4 mag n/a MPO332889  

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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