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28210 Howardfeng (1998 XF63)
Classification: Main-belt Asteroid          SPK-ID: 2028210
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

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Orbit Diagram
Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet was implemented using 2-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet has stopped working because of a recent Java upgrade, here is a possible workaround.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).

Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1884142528685294 6.8383e-08  
a 2.253737403294802 1.1945e-08 au
q 1.829101154291152 1.5065e-07 au
i 7.805135818809498 7.3836e-06 deg
node 62.88112734945914 5.2581e-05 deg
peri 343.9062980384772 5.7945e-05 deg
M 92.3390478430411 2.0938e-05 deg
tp 2457283.516769882412
7.1797e-05 JED
period 1235.814809746619
n .2913057823557004 2.3158e-09 deg/d
Q 2.678373652298451 1.4195e-08 au
  Orbit Determination Parameters
   # obs. used (total)      531  
   data-arc span      12573 days (34.42 yr)  
   first obs. used      1981-10-25  
   last obs. used      2016-03-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5668  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 13:51:08  

Additional Information
 Earth MOID = .839071 au 
 Jupiter MOID = 2.70769 au 
 T_jup = 3.589 
[ 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 15.4 mag n/a MPO259535  

28210 Howardfeng           Discovered 1998 Dec. 14 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Howard Feng (b. 1995) was awarded second place in the 2011 Intel International Science and Engineering Fair for his cellular and molecular biology project. He attends the Bayview Secondary School, Richmond Hill, Ontario, Canada.
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 XF63 = 1981 UV25 = 1993 FT18 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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