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85458 (1997 HD8)
Classification: Main-belt Asteroid          SPK-ID: 2085458
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09094136971253225 4.7995e-08  
a 3.189378268837979 2.268e-08 au
q 2.899331840538468 1.5607e-07 au
i 5.779083012797944 5.5273e-06 deg
node 44.88223701185427 4.2491e-05 deg
peri 201.4376885977835 5.111e-05 deg
M 348.8200631675085 2.7052e-05 deg
tp 2459065.109193821584
(2020-Aug-03.60919382)
0.00015612 TDB
period 2080.450911687906
5.70
2.2192e-05
6.076e-08
d
yr
n .1730394108207657 1.8458e-09 deg/d
Q 3.479424697137489 2.4743e-08 au
  Orbit Determination Parameters
   # obs. used (total)      773  
   data-arc span      10661 days (29.19 yr)  
   first obs. used      1991-04-08  
   last obs. used      2020-06-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58448  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-24 00:16:38  

Additional Information
 Earth MOID = 1.887 au 
 Jupiter MOID = 1.5358 au 
 T_jup = 3.183 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456929.5 (2014-Sep-29.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0895962439516724 4.8123e-08  
q 2.90442755594006 1.5628e-07 au
tp 2456979.503152295411
(2014-Nov-18.00315230)
0.00016637 TDB
node 44.9091074791294 4.2479e-05 deg
peri 200.7716317443796 5.1294e-05 deg
i 5.77945657831509 5.527e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      773  
   data-arc span      10661 days (29.19 yr)  
   first obs. used      1991-04-08  
   last obs. used      2020-06-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58448  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-24 00:16:38  

Additional Information
 Jupiter MOID = 1.5358 au 
 T_jup = 3.183 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.315798992991473E-15 -7.454629220506518E-15 -1.897551945334216E-12 -4.059616829406327E-15 -2.870310791735978E-13 -5.361443580427135E-17
q -7.454629220506518E-15 2.442433911837537E-14 4.576187914461736E-12 8.137064041988889E-15 6.631575964369153E-13 4.994888859118185E-16
tp -1.897551945334216E-12 4.576187914461736E-12 2.768035998726005E-8 1.212770577881018E-11 4.801107813388756E-9 1.531903594833327E-12
node -4.059616829406327E-15 8.137064041988889E-15 1.212770577881018E-11 1.804435947246896E-9 -1.793201849527734E-9 -3.412900001116099E-11
peri -2.870310791735978E-13 6.631575964369153E-13 4.801107813388756E-9 -1.793201849527734E-9 2.631098109510439E-9 3.4240671231208E-11
i -5.361443580427135E-17 4.994888859118185E-16 1.531903594833327E-12 -3.412900001116099E-11 3.4240671231208E-11 3.054819130348145E-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 14.4   n/a MPO436373  
diameter diameter 6.732 km 0.288 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)  

85458 (1997 HD8)          Discovered 1997-Apr-30 by LINEAR at Socorro
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

[ show close-approach data ]
Alternate Designations
 1997 HD8 = 2002 CB168 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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