+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   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.arc Last Updated: 2004-04-20 Alternate Designations  1998 HM88 = 1999 RW213  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jan-28 00:32 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin