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20339 Eileenreed (1998 HM88)
Classification: Main-belt Asteroid          SPK-ID: 2020339
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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Orbit Diagram
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Note: This Java-based orbit viewer will eventually be retired.

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 two-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 is not working, here are some notes that might help.
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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06066471587802648 4.1646e-08  
a 2.85311082645446 1.4379e-08 au
q 2.680027668799079 1.1727e-07 au
i 1.144673528914372 3.6689e-06 deg
node 281.5921067287871 0.00022501 deg
peri 48.62701423531497 0.00022764 deg
M 103.5253022278396 3.5206e-05 deg
tp 2458494.302033973077
(2019-Jan-10.80203397)
0.00017204 TDB
period 1760.258254244316
4.82
1.3307e-05
3.643e-08
d
yr
n .2045154448967768 1.546e-09 deg/d
Q 3.026193984109841 1.5251e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1269  
   data-arc span      10475 days (28.68 yr)  
   first obs. used      1992-02-01  
   last obs. used      2020-10-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53706  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:03:25  

Additional Information
 Earth MOID = 1.66902 au 
 Jupiter MOID = 2.18795 au 
 T_jup = 3.302 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.4   n/a MPO365495  

20339 Eileenreed           Discovered 1998 Apr. 21 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Eileen Reed mentored a finalist in the 2004 Intel Science Talent Search, a science competition for high school seniors. She teaches at the New Milford High School, New Milford, Connecticut.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20040415/MPCPages.arcLast Updated: 2004-04-20

Alternate Designations
 1998 HM88 = 1999 RW213 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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