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JPL Small-Body Database Browser
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20468 Petercook (1999 NK4)
Classification: Main-belt Asteroid          SPK-ID: 2020468
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2375219897132997 4.4456e-08  
a 3.180383155906001 2.4016e-08 au
q 2.424972220664544 1.393e-07 au
i 1.961406022564014 6.0784e-06 deg
node 52.58418503185896 0.00014935 deg
peri 274.8044646599466 0.00014998 deg
M 151.8857222206111 1.5732e-05 deg
tp 2457726.458520077058
(2016-Dec-03.95852008)
8.3989e-05 TDB
period 2071.655769692619
5.67
2.3465e-05
6.424e-08
d
yr
n .1737740435774303 1.9683e-09 deg/d
Q 3.935794091147458 2.972e-08 au
  Orbit Determination Parameters
   # obs. used (total)      735  
   data-arc span      8871 days (24.29 yr)  
   first obs. used      1994-10-26  
   last obs. used      2019-02-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58564  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-12 23:41:35  

Additional Information
 Earth MOID = 1.41365 au 
 Jupiter MOID = 1.42549 au 
 T_jup = 3.154 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.5   n/a MPO337431  
diameter diameter 7.943 km 0.217 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.049   0.017 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20468 Petercook           Discovered 1999 July 13 by J. Broughton at Reedy Creek.
British comedy writer and performer Peter E. Cook (1937-1995) was the prime instigator of the new genre of satirical sketch comedy with his 1960's revue Beyond The Fringe. His most famous sketch included diminutive Dudley Moore as an ever hopping one-legged man auditioning for the role of Tarzan!
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20050407/MPCPages.arcLast Updated: 2005-04-15

[ show close-approach data ]
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