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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 3 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1850561387546999 5.8327e-08  
a 2.437779284674972 1.3969e-08 AU
q 1.986653263116827 1.4408e-07 AU
i 2.033622973548697 5.0478e-06 deg
node 225.5317671674414 0.00019247 deg
peri 144.2314704192997 0.00019315 deg
M 331.5813809499328 2.0339e-05 deg
tp 2456910.246447211464
(2014-Sep-09.74644721)
7.9022e-05 JED
period 1390.240705451645
3.81
1.195e-05
3.272e-08
d
yr
n .2589479638945311 2.2257e-09 deg/d
Q 2.888905306233116 1.6554e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      941  
   data-arc span      11883 days (32.53 yr)  
   first obs. used      1980-11-30  
   last obs. used      2013-06-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54679  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Aug-05 15:42:10  

Additional Information
 Earth MOID = .985237 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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