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9917 Keynes (1979 MK)
Classification: Main-belt Asteroid          SPK-ID: 2009917
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 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .132982269084803 6.7708e-08  
a 2.371392762064919 1.7521e-08 AU
q 2.056039571674248 1.612e-07 AU
i 6.37184998662279 6.7163e-06 deg
node 163.6726862812098 4.6276e-05 deg
peri 171.2043894544399 5.107e-05 deg
M 216.4733061279625 2.4998e-05 deg
tp 2457532.282255983088
(2016-May-23.78225598)
9.5922e-05 JED
period 1333.839768681589
3.65
1.4782e-05
4.047e-08
d
yr
n .2698974857795969 2.9911e-09 deg/d
Q 2.68674595245559 1.985e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1019  
   data-arc span      12752 days (34.91 yr)  
   first obs. used      1979-06-26  
   last obs. used      2014-05-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50344  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-16 13:43:43  

Additional Information
 Earth MOID = 1.04712 AU 
 T_jup = 3.524 
[ 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 13.7 mag n/a MPO250309  

9917 Keynes           Discovered 1999 June 26 by C. Torres at Cerro el Roble.
British economist John Maynard Keynes (1883-1946) set down the foundations of macroeconomics with his General Theory of Employment, Interest and Money (1936). Although his ideas fell largely out of favor during the 1970s, they were widely revived in 2007--2008 as a cure for the worldwide recession.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20090209/MPCPages.arcLast Updated: 2009-02-11

[ show close-approach data ]
Alternate Designations
 1979 MK = 1997 QW 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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