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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 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07873787825309841 5.5278e-08  
a 2.303896611650461 1.9401e-08 AU
q 2.122492680734601 1.2718e-07 AU
i 6.91452082813015 8.0915e-06 deg
node 167.1737226514155 4.7331e-05 deg
peri 247.134374003519 7.1141e-05 deg
M 4.981227381918472 5.2487e-05 deg
tp 2456982.826328768446
(2014-Nov-21.32632877)
0.00018621 JED
period 1277.299981617996
3.50
1.6134e-05
4.417e-08
d
yr
n .2818445198315722 3.56e-09 deg/d
Q 2.485300542566322 2.0928e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      814  
   data-arc span      7067 days (19.35 yr)  
   first obs. used      1995-04-26  
   last obs. used      2014-08-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55261  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Sep-12 14:18:32  

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 14.5 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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