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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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1168287423994896 3.7946e-08  
a 3.016928819486574 1.5531e-08 au
q 2.664464819597181 1.129e-07 au
i 10.33093160902494 3.4468e-06 deg
node 128.9758714428569 2.3479e-05 deg
peri 43.23491543376471 2.7934e-05 deg
M 28.64475526581593 1.4475e-05 deg
tp 2458848.203950618393
(2019-Dec-30.70395062)
7.7061e-05 TDB
period 1914.018020702289
5.24
1.478e-05
4.047e-08
d
yr
n .1880860034263989 1.4524e-09 deg/d
Q 3.369392819375967 1.7345e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2288  
   data-arc span      13684 days (37.46 yr)  
   first obs. used      1983-02-15  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45873  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 01:02:13  

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

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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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