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9986 Hirokun (1996 NX)
Classification: Main-belt Asteroid          SPK-ID: 2009986
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05708888128463017 6.3572e-08  
a 2.571994762146176 2.4229e-08 AU
q 2.425162458505322 1.5856e-07 AU
i 14.0036287604007 6.5407e-06 deg
node 271.2726217424621 2.7678e-05 deg
peri 316.0618100458109 6.9661e-05 deg
M 219.5903851559313 6.361e-05 deg
tp 2457588.121792817625
(2016-Jul-18.62179282)
0.00026501 JED
period 1506.619369686856
4.12
2.1289e-05
5.829e-08
d
yr
n .2389455540285695 3.3764e-09 deg/d
Q 2.718827065787029 2.5612e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      927  
   data-arc span      8724 days (23.89 yr)  
   first obs. used      1991-02-11  
   last obs. used      2014-12-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50303  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jan-08 00:32:05  

Additional Information
 Earth MOID = 1.42939 AU 
 T_jup = 3.385 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.4 mag n/a MPO267747  

9986 Hirokun           Discovered 1996 July 12 by Y. Shimizu and T. Urata at Nachi-Katsuura.
Hirokun is a nickname for Hiroshi Fukazawa, who was the fiancé of Mizuho Urata (1972-2004), daughter of the second discoverer.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20050721/MPCPages.arcLast Updated: 2005-07-21

[ show close-approach data ]
Alternate Designations
 1996 NX = 1991 CM2 = 1991 GM1 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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