Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Near-Earth Object (NEO) Program
Search JPL
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04981771027513073 4.3756e-08  
a 2.292787591895816 1.2227e-08 au
q 2.178566163920335 9.7497e-08 au
i 1.787917956024418 4.653e-06 deg
node 183.9884700545938 0.00016067 deg
peri 23.06966287703909 0.00017289 deg
M 187.9250594213156 6.1436e-05 deg
tp 2458206.620940545460
(2018-Mar-29.12094055)
0.00021568 JED
period 1268.072723794365
3.47
1.0144e-05
2.777e-08
d
yr
n .2838953896293876 2.271e-09 deg/d
Q 2.407009019871296 1.2836e-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 = 1.17316 au 
 Jupiter MOID = 2.55193 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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2016-May-06 16:48 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin