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6979 Shigefumi (1993 RH)
Classification: Main-belt Asteroid          SPK-ID: 2006979
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2216402120959445 5.2778e-08  
a 2.653537030494 9.0525e-09 au
q 2.065406520250867 1.3919e-07 au
i 14.88061911260823 5.3587e-06 deg
node 359.2035339904967 1.3748e-05 deg
peri 339.0346196288106 1.6161e-05 deg
M 345.6088228219009 9.3283e-06 deg
tp 2458663.614620491886
4.1003e-05 TDB
period 1578.832856818477
n .228016536674718 1.1668e-09 deg/d
Q 3.241667540737133 1.1059e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2210  
   data-arc span      24779 days (67.84 yr)  
   first obs. used      1952-01-31  
   last obs. used      2019-12-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4371  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 22:19:12  

Additional Information
 Earth MOID = 1.06328 au 
 Jupiter MOID = 2.19037 au 
 T_jup = 3.307 
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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.4   n/a MPO452266  
diameter diameter 8.232 km 0.098 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 12.10795 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.253   0.027 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

6979 Shigefumi           Discovered 1993 Sept. 12 by K. Endate and K. Watanabe at Kitami.
Named in honor of Shigefumi Mori (b. 1951), Japanese mathematician who was awarded the Fields Medal in 1990. He resolved Hartshorne's expectation.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19980808/MPCPages.arcLast Updated: 2009-11-17
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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