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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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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer 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.


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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 
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Orbital Elements at Epoch 2456809.5 (2014-Jun-01.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06304500096452473 4.1828e-08  
q 2.672402456810886 1.1806e-07 au
tp 2456725.997739894356
(2014-Mar-09.49773989)
0.00016584 TDB
node 282.0234604693697 0.00022517 deg
peri 46.53333382247644 0.00022761 deg
i 1.144283809950577 3.669e-06 deg
  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
 Jupiter MOID = 2.18795 au 
 T_jup = 3.302 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.749621533040713E-15 -4.906872106760146E-15 2.139165975254073E-12 -7.766990929149222E-15 3.909200337941535E-13 -5.095412759423421E-17
q -4.906872106760146E-15 1.39372902577286E-14 -6.199976674309734E-12 1.957478316038329E-14 -1.133596951308594E-12 2.436891195766857E-16
tp 2.139165975254073E-12 -6.199976674309734E-12 2.750400736375174E-8 -3.505636145295269E-11 5.532342933238403E-9 -4.71523617287293E-13
node -7.766990929149222E-15 1.957478316038329E-14 -3.505636145295269E-11 5.070349092902804E-8 -5.070003800263799E-8 1.989781633474966E-11
peri 3.909200337941535E-13 -1.133596951308594E-12 5.532342933238403E-9 -5.070003800263799E-8 5.180494713179691E-8 -1.999264574698623E-11
i -5.095412759423421E-17 2.436891195766857E-16 -4.71523617287293E-13 1.989781633474966E-11 -1.999264574698623E-11 1.346168603124308E-11

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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