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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06066471654342587 4.1637e-08  
a 2.853110825889514 1.4359e-08 au
q 2.680027666369947 1.1722e-07 au
i 1.144673525393435 3.6687e-06 deg
node 281.5921081811519 0.00022444 deg
peri 48.62701428224521 0.00022706 deg
M 103.5253009222156 3.5162e-05 deg
tp 2458494.302040507413
(2019-Jan-10.80204051)
0.00017181 TDB
period 1760.258253721491
4.82
1.3288e-05
3.638e-08
d
yr
n .2045154449575212 1.5439e-09 deg/d
Q 3.026193985409082 1.523e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1273  
   data-arc span      10514 days (28.79 yr)  
   first obs. used      1992-02-01  
   last obs. used      2020-11-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53671  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-17 20:37:49  

Additional Information
 Earth MOID = 1.66902 au 
 Jupiter MOID = 2.18795 au 
 T_jup = 3.302 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456816.5 (2014-Jun-08.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06304068169206528 4.182e-08  
q 2.672401386288395 1.1802e-07 au
tp 2456725.989955992851
(2014-Mar-09.48995599)
0.0001656 TDB
node 282.0234467604466 0.0002246 deg
peri 46.53157559091238 0.00022703 deg
i 1.14428367484209 3.6689e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1273  
   data-arc span      10514 days (28.79 yr)  
   first obs. used      1992-02-01  
   last obs. used      2020-11-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53671  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-17 20:37:49  

Additional Information
 Jupiter MOID = 2.18795 au 
 T_jup = 3.302 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.748912060595281E-15 -4.90423958452603E-15 2.131732456264554E-12 -7.582483569132968E-15 3.891535966714377E-13 -5.107755284442219E-17
q -4.90423958452603E-15 1.392754708856677E-14 -6.172240591700979E-12 1.904923038358151E-14 -1.127168934085194E-12 2.438230459282685E-16
tp 2.131732456264554E-12 -6.172240591700979E-12 2.742367817677891E-8 -3.464528071629484E-11 5.514806709567908E-9 -4.695438128501062E-13
node -7.582483569132968E-15 1.904923038358151E-14 -3.464528071629484E-11 5.044367812635048E-8 -5.044019552531392E-8 2.044449418545015E-11
peri 3.891535966714377E-13 -1.127168934085194E-12 5.514806709567908E-9 -5.044019552531392E-8 5.154142371120776E-8 -2.053877971915481E-11
i -5.107755284442219E-17 2.438230459282685E-16 -4.695438128501062E-13 2.044449418545015E-11 -2.053877971915481E-11 1.346052959824083E-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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