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

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05634870427261876 2.7122e-08  
a 2.573699107511179 1.0439e-08 au
q 2.428674497615329 7.1294e-08 au
i 13.99079092475798 4.2584e-07 deg
node 271.1855794150347 3.2174e-06 deg
peri 317.0806508627596 1.0521e-05 deg
M 70.90726201960733 7.5206e-06 deg
tp 2459099.454279405613
(2020-Sep-06.95427941)
3.1824e-05 TDB
period 1508.11717119199
4.13
9.1751e-06
2.512e-08
d
yr
n .2387082428850421 1.4523e-09 deg/d
Q 2.718723717407029 1.1027e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2466  
   data-arc span      11091 days (30.37 yr)  
   first obs. used      1991-02-11  
   last obs. used      2021-06-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40219  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 02:10:23  

Additional Information
 Earth MOID = 1.43064 au 
 Jupiter MOID = 2.36905 au 
 T_jup = 3.384 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.59   n/a E2021B10  
rotation period rot_per 6.9626 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Behrend, R. (2020) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]

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

Alternate Designations
 1996 NX = 1991 CM2 = 1991 GM1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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