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13991 Kenphillips (1993 FZ6)
Classification: Main-belt Asteroid          SPK-ID: 2013991
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1972974441773301 3.3476e-08  
a 2.401092631815131 9.2856e-09 au
q 1.927363192324987 8.1189e-08 au
i 3.296218301840412 3.5319e-06 deg
node 69.26349665111321 7.9705e-05 deg
peri 209.1872100970673 8.0415e-05 deg
M 37.98159499102659 1.229e-05 deg
tp 2458857.122006914085
(2020-Jan-08.62200691)
4.6103e-05 TDB
period 1358.976038871566
3.72
7.8833e-06
2.158e-08
d
yr
n .264905332914426 1.5367e-09 deg/d
Q 2.874822071305275 1.1118e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1321  
   data-arc span      10000 days (27.38 yr)  
   first obs. used      1993-03-17  
   last obs. used      2020-08-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53053  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 00:48:20  

Additional Information
 Earth MOID = .911757 au 
 Jupiter MOID = 2.25829 au 
 T_jup = 3.497 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.9   n/a MPO431662  
rotation period rot_per 3.523 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

13991 Kenphillips           Discovered 1993 Mar. 17 at the European Southern Observatory in the course of the Uppsala-ESO Survey of Asteroids and Comets.
Ken Phillips (b. 1946), a solar physicist at the Rutherford Appleton Laboratory, works on the heating of the solar corona and x-ray spectroscopy and solar and stellar flares.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20010509/MPCPages.arcLast Updated: 2009-05-11

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Alternate Designations
 1993 FZ6 = 1997 JD10 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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