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JPL Small-Body Database Browser
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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09073390497665282 4.8988e-08  
a 3.189387546270341 2.7749e-08 au
q 2.900001959713328 1.6197e-07 au
i 5.779165300739974 5.6375e-06 deg
node 44.8848740192251 5.5768e-05 deg
peri 201.2804184521699 6.7298e-05 deg
M 279.7252110125063 4.0659e-05 deg
tp 2459064.412462879521
(2020-Aug-02.91246288)
0.0002364 TDB
period 2080.459989283142
5.70
2.7152e-05
7.434e-08
d
yr
n .1730386558042119 2.2583e-09 deg/d
Q 3.478773132827354 3.0267e-08 au
  Orbit Determination Parameters
   # obs. used (total)      632  
   data-arc span      10257 days (28.08 yr)  
   first obs. used      1991-04-08  
   last obs. used      2019-05-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60983  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 05:55:32  

Additional Information
 Earth MOID = 1.88751 au 
 Jupiter MOID = 1.5364 au 
 T_jup = 3.183 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456259.5 (2012-Nov-28.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08887219563763239 4.9163e-08  
q 2.907356700320695 1.6196e-07 au
tp 2456978.772426379732
(2014-Nov-17.27242638)
0.00023533 TDB
node 44.92045918707453 5.5735e-05 deg
peri 200.5249632889758 6.7672e-05 deg
i 5.780076099209361 5.6376e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      632  
   data-arc span      10257 days (28.08 yr)  
   first obs. used      1991-04-08  
   last obs. used      2019-05-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60983  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 05:55:32  

Additional Information
 Jupiter MOID = 1.5364 au 
 T_jup = 3.183 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.417025586858171E-15 -7.867610949862322E-15 -3.348784763384386E-12 8.723037556942066E-16 -5.159850824721389E-13 -3.338187859422329E-18
q -7.867610949862322E-15 2.623011983714003E-14 1.143206009768486E-11 -1.288969143854694E-14 1.735210379290054E-12 3.93123740815439E-16
tp -3.348784763384386E-12 1.143206009768486E-11 5.538253777255748E-8 -2.365904728609513E-11 9.07255615867662E-9 5.72309208926332E-12
node 8.723037556942066E-16 -1.288969143854694E-14 -2.365904728609513E-11 3.106408104699475E-9 -3.09421054315335E-9 -5.753673539035635E-11
peri -5.159850824721389E-13 1.735210379290054E-12 9.07255615867662E-9 -3.09421054315335E-9 4.579436805611507E-9 5.819095351123156E-11
i -3.338187859422329E-18 3.93123740815439E-16 5.72309208926332E-12 -5.753673539035635E-11 5.819095351123156E-11 3.178307234098393E-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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