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128523 Johnmuir (2004 PX42)
Classification: Main-belt Asteroid          SPK-ID: 2128523
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 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2059359647520527 1.8016e-07  
a 2.406586925910011 6.2469e-08 AU
q 1.910984125563056 3.95e-07 AU
i 1.325430835322212 8.3585e-06 deg
node 291.7270466931292 0.00040073 deg
peri 81.17989559748564 0.00040265 deg
M 258.8621753591183 5.9414e-05 deg
tp 2457383.599745822006
(2015-Dec-27.09974582)
0.0002387 JED
period 1363.643216428982
3.73
5.3095e-05
1.454e-07
d
yr
n .2639986733060163 1.0279e-08 deg/d
Q 2.902189726256966 7.5334e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      215  
   data-arc span      5045 days (13.81 yr)  
   first obs. used      2000-08-01  
   last obs. used      2014-05-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52251  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-16 16:41:45  

Additional Information
 Earth MOID = .911899 AU 
 T_jup = 3.493 
[ 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 17.0 mag n/a MPO251187  

128523 Johnmuir           Discovered 2004 Aug. 11 by R. E. Jones at the Francisquito Observatory.
John Muir (1838-1914), a Scottish-born Californian pioneer explorer, glaciologist and conservationist, is acknowledged as the primary architect of the National Park concept used worldwide to protect and preserve wild places, and he was one of the founders of the worldwide conservation organization known as the Sierra Club.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20060613/MPCPages.arcLast Updated: 2008-05-22

[ show close-approach data ]
Alternate Designations
 2004 PX42 = 2002 CK262 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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