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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 2 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07878756062048024 6.0902e-08  
a 2.304098189692635 2.2131e-08 AU
q 2.122563913896688 1.3921e-07 AU
i 6.914333042766731 8.5163e-06 deg
node 167.1729304947268 5.1914e-05 deg
peri 247.0663578875748 7.6848e-05 deg
M 308.677917223325 5.7372e-05 deg
tp 2456982.617497074695
(2014-Nov-21.11749707)
0.00020413 JED
period 1277.467620170067
3.50
1.8406e-05
5.039e-08
d
yr
n .281807534152665 4.0603e-09 deg/d
Q 2.485632465488582 2.3875e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      807  
   data-arc span      6664 days (18.25 yr)  
   first obs. used      1995-04-26  
   last obs. used      2013-07-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55699  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Aug-26 21:40:07  

Additional Information
 Earth MOID = 1.14251 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 14.5 mag n/a MPO267796  

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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