+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   8818 Hermannbondi (1985 RW2) Classification: Main-belt Asteroid          SPK-ID: 2008818 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 31 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .08099280699369991 4.7516e-08   a 2.785912021446036 1.2167e-08 au q 2.560273186791629 1.3026e-07 au i 1.77555311704464 3.6001e-06 deg node 96.16289177619872 0.00014205 deg peri 250.2036392176391 0.00014389 deg M 159.7249989353342 2.4303e-05 deg tp 2458246.936393306013 (2018-May-08.43639331) 0.00011407 TDB period 1698.437315499162 4.65 1.1126e-05 3.046e-08 d yr n .2119595446442471 1.3885e-09 deg/d Q 3.011550856100443 1.3152e-08 au   Orbit Determination Parameters    # obs. used (total)      1946      data-arc span      12695 days (34.76 yr)      first obs. used      1985-09-05      last obs. used      2020-06-08      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .49904      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 03:18:13   Additional Information  Earth MOID = 1.55365 au   Jupiter MOID = 2.31397 au   T_jup = 3.326  [ hide covariance matrix ] Orbital Elements at Epoch 2456709.5 (2014-Feb-21.0) TDB Reference: JPL 31 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .08012592572610942 4.7216e-08   q 2.561772146025921 1.2922e-07 au tp 2456536.766372860590 (2013-Sep-01.26637286) 0.00011569 TDB node 96.22132566656343 0.00014184 deg peri 247.8951920313163 0.00014377 deg i 1.776376563840208 3.6045e-06 deg   Orbit Determination Parameters    # obs. used (total)      1946      data-arc span      12695 days (34.76 yr)      first obs. used      1985-09-05      last obs. used      2020-06-08      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .49904      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 03:18:13   Additional Information  Jupiter MOID = 2.31397 au   T_jup = 3.326  Orbit Covariance (6×6)   e q tp node peri i e 2.229336526604646E-15 -6.079869196834853E-15 1.555500983436364E-12 -1.167697566429177E-14 2.639936613772547E-13 -1.946540054587418E-16 q -6.079869196834853E-15 1.669750844154982E-14 -4.270235206646823E-12 3.15248006148079E-14 -7.231040216745432E-13 5.700714653897513E-16 tp 1.555500983436364E-12 -4.270235206646823E-12 1.338309295442262E-8 -1.008253903898531E-11 2.740996570376995E-9 -8.38372514690521E-13 node -1.167697566429177E-14 3.15248006148079E-14 -1.008253903898531E-11 2.011872265700616E-8 -2.011051746366968E-8 2.79323480398386E-11 peri 2.639936613772547E-13 -7.231040216745432E-13 2.740996570376995E-9 -2.011051746366968E-8 2.066966092058608E-8 -2.808441156573037E-11 i -1.946540054587418E-16 5.700714653897513E-16 -8.38372514690521E-13 2.79323480398386E-11 -2.808441156573037E-11 1.299208485301517E-11 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 13.9   n/a MPO452294   diameter diameter 9.448 km 0.098 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.062   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   8818 Hermannbondi           Discovered 1985 Sept. 5 by H. Debehogne at the European Southern Observatory. British cosmologist Hermann Bondi (1919-2005), known for work on the steady-state theory of the universe, had an impressive career that encompassed mathematics, radar technology, energy, defence, ecology and humanism. As director general of the European Space Research Organization he was a leader in space research. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20070730/MPCPages.arc Last Updated: 2007-08-07 [ show close-approach data ] Alternate Designations  1985 RW2 = 1990 SV26 = 1996 AD8  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-26 00:58 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin