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15806 Kohei (1994 GN1)
Classification: Main-belt Asteroid          SPK-ID: 2015806
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1168287400306727 3.8265e-08  
a 3.016928818321646 1.7411e-08 au
q 2.664464825714902 1.1494e-07 au
i 10.33092804639868 3.875e-06 deg
node 128.9758761415318 2.3658e-05 deg
peri 43.23490930414619 2.8522e-05 deg
M 28.64475714479716 1.6348e-05 deg
tp 2458848.203940716591
(2019-Dec-30.70394072)
8.6733e-05 TDB
period 1914.018019593698
5.24
1.6569e-05
4.536e-08
d
yr
n .1880860035353375 1.6281e-09 deg/d
Q 3.369392810928391 1.9445e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1925  
   data-arc span      13503 days (36.97 yr)  
   first obs. used      1983-02-15  
   last obs. used      2020-02-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49051  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 21:28:37  

Additional Information
 Earth MOID = 1.68224 au 
 Jupiter MOID = 1.65178 au 
 T_jup = 3.213 
[ show covariance matrix ]

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 12.7   n/a MPO337392  
diameter diameter 9.653 km 0.147 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 145.700 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.157   0.017 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

15806 Kohei           Discovered 1994 Apr. 15 by K. Endate and K. Watanabe at Kitami.
Kohei Mori (b. 1956) is an amateur astronomer and junior high school teacher. He has been a member of the Astronomical Society of Shikoku since 1983, and promotes the astronomical education in his local community.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2015-08-29Last Updated: 2015-09-02

[ show close-approach data ]
Alternate Designations
 1994 GN1 = 1983 CT2 = 1999 HT3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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