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9477 Kefennell (1998 QK41)
Classification: Main-belt Asteroid          SPK-ID: 2009477
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04974551473329113 4.3776e-08  
a 2.292878535265733 1.2189e-08 au
q 2.178818112308025 9.7537e-08 au
i 1.787751949779615 4.653e-06 deg
node 183.9879560138986 0.00016069 deg
peri 22.99063168752341 0.00017293 deg
M 131.2377353726857 6.1586e-05 deg
tp 2456938.197516207206
(2014-Oct-07.69751621)
0.00021759 JED
period 1268.148171657986
3.47
1.0112e-05
2.769e-08
d
yr
n .2838784994101544 2.2637e-09 deg/d
Q 2.406938958223442 1.2795e-08 au
  Orbit Determination Parameters
   # obs. used (total)      969  
   data-arc span      20131 days (55.12 yr)  
   first obs. used      1960-09-24  
   last obs. used      2015-11-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .58542  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Nov-30 16:02:40  

Additional Information
 Earth MOID = 1.17334 au 
 Jupiter MOID = 2.55158 au 
 T_jup = 3.595 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.2 mag n/a MPO344379  

9477 Kefennell           Discovered 1998 Aug. 17 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Katherine Elizabeth Fennell (b. 1999) is a finalist in the 2012 Broadcom MASTERS, a math and science competition for middle-school students, for her animal and plant sciences project. She attends the Montessori Middle School, Norwalk, Connecticut.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20121029/MPCPages.arcLast Updated: 2013-03-29

Alternate Designations
 1998 QK41 = 1992 YY4 = 4836 P-L 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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