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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07961053250868796 5.49e-08  
a 2.303948834713257 1.2785e-08 au
q 2.120530241108963 1.2554e-07 au
i 6.916611149063674 5.4125e-06 deg
node 167.1657709729459 4.1801e-05 deg
peri 247.2567824430747 5.4864e-05 deg
M 173.8759767163784 3.2836e-05 deg
tp 2456983.557407693448
(2014-Nov-22.05740769)
0.00011739 JED
period 1277.343411232944
3.50
1.0633e-05
2.911e-08
d
yr
n .2818349371313649 2.346e-09 deg/d
Q 2.48736742831755 1.3803e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1161  
   data-arc span      7659 days (20.97 yr)  
   first obs. used      1995-04-26  
   last obs. used      2016-04-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51276  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 13:42:19  

Additional Information
 Earth MOID = 1.14025 au 
 Jupiter MOID = 2.75347 au 
 T_jup = 3.575 
[ 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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