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8552 Hyoichi (1995 HE)
Classification: Main-belt Asteroid          SPK-ID: 2008552
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1784718944185538 3.3989e-08  
a 2.80073089859734 1.4577e-08 au
q 2.300879149368094 9.5843e-08 au
i 4.344725240470241 5.1893e-06 deg
node 27.64049703012018 5.1859e-05 deg
peri 59.55497348400061 5.3823e-05 deg
M 236.1720861980187 1.4899e-05 deg
tp 2459589.372883514511
(2022-Jan-09.87288351)
7.2042e-05 TDB
period 1712.00686142733
4.69
1.3365e-05
3.659e-08
d
yr
n .2102795310644151 1.6416e-09 deg/d
Q 3.300582647826586 1.7178e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1156  
   data-arc span      21018 days (57.54 yr)  
   first obs. used      1960-11-24  
   last obs. used      2018-06-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52962  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Oct-03 16:45:36  

Additional Information
 Earth MOID = 1.32082 au 
 Jupiter MOID = 1.93764 au 
 T_jup = 3.297 
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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 14.0   n/a MPO263425  
diameter diameter 8.908 km 0.218 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.056   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

8552 Hyoichi           Discovered 1995 Apr. 20 by A. Nakamura at Kuma Kogen.
Named in honor of Hyoichi Kohno (b. 1958), Japanese adventurer, born in Ehime prefecture, where this minor planet was discovered. Since 1980, he has boated down the Yukon River; climbed Mt. McKinley (6194 m) and Cerro Aconcagua (6959 m), the highest mountains in North and South America; walked across Patagonia; walked from Los Angeles to New York; walked from Algeria to Togo across the Sahara desert; and so on. In 1997, he became the first Japanese to walk to the North Pole alone.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19980610/MPCPages.arcLast Updated: 2009-11-17

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Alternate Designations
 1995 HE = 1960 WB1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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