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21410 Cahill (1998 FH65)
Classification: Main-belt Asteroid          SPK-ID: 2021410
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 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1301473623279328 5.3397e-08  
a 2.280516899025288 1.3317e-08 AU
q 1.98371363987287 1.2086e-07 AU
i 1.749755688937463 6.6804e-06 deg
node 220.9157871543422 0.0001589 deg
peri 46.35634509325295 0.00016075 deg
M 188.0525898897337 2.485e-05 deg
tp 2457401.316024200927
(2016-Jan-13.81602420)
8.8471e-05 JED
period 1257.906522544475
3.44
1.1018e-05
3.017e-08
d
yr
n .2861897871964265 2.5068e-09 deg/d
Q 2.577320158177705 1.505e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      914  
   data-arc span      8413 days (23.03 yr)  
   first obs. used      1991-03-11  
   last obs. used      2014-03-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54166  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-09 22:59:19  

Additional Information
 Earth MOID = .967942 AU 
 T_jup = 3.594 
[ 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 14.8 mag n/a MPO236503  

21410 Cahill           Discovered 1998 Mar. 20 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
James Andrew Cahill (b. 1987) is a finalist in the 2005 Intel Science Talent Search, a science competition for high school seniors, for his earth and planetary science project. He attends the Flagstaff High School, Flagstaff, Arizona.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20050224/MPCPages.arcLast Updated: 2005-02-28

[ show close-approach data ]
Alternate Designations
 1998 FH65 = 1991 EM3 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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