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128523 Johnmuir (2004 PX42)
Classification: Main-belt Asteroid          SPK-ID: 2128523
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2047455361985004 5.9292e-08  
a 2.407203008484558 8.7141e-09 au
q 1.914338937773744 1.4258e-07 au
i 1.326380062070736 4.1899e-06 deg
node 291.4202967275565 0.00026068 deg
peri 81.8447522449314 0.00026105 deg
M 170.651902842032 1.1158e-05 deg
tp 2458749.839792062959
(2019-Sep-23.33979206)
4.2185e-05 TDB
period 1364.166885808648
3.73
7.4075e-06
2.028e-08
d
yr
n .2638973308508365 1.433e-09 deg/d
Q 2.900067079195372 1.0498e-08 au
  Orbit Determination Parameters
   # obs. used (total)      459  
   data-arc span      7564 days (20.71 yr)  
   first obs. used      2000-08-01  
   last obs. used      2021-04-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47723  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 01:02:12  

Additional Information
 Earth MOID = .914604 au 
 Jupiter MOID = 2.57133 au 
 T_jup = 3.493 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.09   n/a MPCxxxxx  

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

Alternate Designations
 2004 PX42 = 2002 CK262 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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