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23981 Patjohnson (1999 LC4)
Classification: Main-belt Asteroid          SPK-ID: 2023981
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 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07873787721259182 5.5122e-08  
a 2.303896599309801 1.55e-08 AU
q 2.122492671762838 1.2692e-07 AU
i 6.914526281197771 5.7353e-06 deg
node 167.173709273029 4.5216e-05 deg
peri 247.1343609132246 6.5705e-05 deg
M 4.981260877873177 4.2583e-05 deg
tp 2456982.826210064942
(2014-Nov-21.32621006)
0.00015117 JED
period 1277.299971355345
3.50
1.289e-05
3.529e-08
d
yr
n .2818445220960927 2.8443e-09 deg/d
Q 2.485300526856764 1.6721e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      929  
   data-arc span      7202 days (19.72 yr)  
   first obs. used      1995-04-26  
   last obs. used      2015-01-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53054  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Feb-04 14:06:18  

Additional Information
 Earth MOID = 1.14331 AU 
 T_jup = 3.576 
[ 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 14.6 mag n/a MPO324530  

23981 Patjohnson           Discovered 1999 June 9 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Patricia Johnson mentored a finalist in the 2007 Discovery Channel Young Scientist Challenge (DCYSC), a middle school science competition. She teaches at the St. Paul's School, Clearwater, Florida.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20071026/MPCPages.arcLast Updated: 2007-10-28

[ show close-approach data ]
Alternate Designations
 1999 LC4 = 2000 NC1 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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