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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.arcLast Updated: 2007-08-07

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1924-Sep-22 04:05 00:01 Eunom 0.0477871410612028 0.0477742431268041 0.0478000390943198 5.1192246917456 5.1192246343632 2424050.670081760 1.3111868235616 651.890871543388 32.057821518381 -9.59470288077819 38681.6781784493 T 31 CATAB v2.0f-lin.ifort 2020-Nov-13 03:18:18 2020-Nov-13 03:18

Alternate Designations
 1985 RW2 = 1990 SV26 = 1996 AD8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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