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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1167564881505041 2.3437e-08  
a 3.017140723522652 1.4413e-08 au
q 2.664869968388276 6.8791e-08 au
i 10.33102384463959 8.7767e-07 deg
node 128.9748226831075 6.4943e-06 deg
peri 43.31019234271904 1.1459e-05 deg
M 66.20130396236438 7.4157e-06 deg
tp 2458848.489336356430
(2019-Dec-30.98933636)
3.8397e-05 TDB
period 1914.219680381646
5.24
1.3716e-05
3.755e-08
d
yr
n .1880661888964726 1.3476e-09 deg/d
Q 3.369411478657028 1.6096e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2326  
   data-arc span      13694 days (37.49 yr)  
   first obs. used      1983-02-15  
   last obs. used      2020-08-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45614  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 01:09:46  

Additional Information
 Earth MOID = 1.68234 au 
 Jupiter MOID = 1.65095 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 12.77   n/a E2021B10  
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. 2020-October); 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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1929-Mar-01 04:11 00:02 Jupiter 1.91884550190714 1.91884453025641 1.9188464735582 2.51134509249591 2.32895002127518 2425671.674332115 2.00226900026905 72.530069834265 3.83911179601024 80.1619527926999 3454359.41106251 T 34 CATAB v2.0f-lin.ifort 2021-Apr-13 01:10:18 2021-Apr-13 01:10
1938-Feb-28 19:08 00:02 Jupiter 1.81747341114268 1.81747255478532 1.81747426750169 3.29067118377253 3.14585901047102 2428958.297110795 1.64879754815321 104.725163347652 10.7665363158248 -70.0279966001169 6349073.81912717 T 34 CATAB v2.0f-lin.ifort 2021-Apr-13 01:10:18 2021-Apr-13 01:10
1975-Dec-30 14:57 < 00:01 Jupiter 1.77961289428811 1.77961243905339 1.77961334952323 1.99390333592282 1.73888838282539 2442777.122691040 0.962676204405302 61.0369212880874 8.67955168131134 77.6388189007298 4622284.85839681 T 34 CATAB v2.0f-lin.ifort 2021-Apr-13 01:10:18 2021-Apr-13 01:10
2022-Nov-05 03:04 < 00:01 Jupiter 1.67747189289998 1.67747172546728 1.67747206033269 2.11599284556266 1.86213476878163 2459888.627893143 0.246666813621576 22.0046313740059 6.49128304324263 67.8130966932811 6205621.65271402 T 34 CATAB v2.0f-lin.ifort 2021-Apr-13 01:10:18 2021-Apr-13 01:10
2069-Sep-27 07:58 00:01 Jupiter 1.64914419412171 1.64914393703394 1.64914445121033 2.50174933656808 2.28725228127613 2477016.831619991 1.3078597244066 100.384684636389 5.7572287693474 85.5852955426801 6643001.91259823 T 34 CATAB v2.0f-lin.ifort 2021-Apr-13 01:10:18 2021-Apr-13 01:10
2116-Aug-25 09:02 00:02 Jupiter 1.71445522255154 1.71445430600038 1.71445613910874 2.93831274077511 2.76506537637533 2494149.876356651 2.39984447095457 176.891564060753 8.21597092043529 -80.7332213907753 6641196.80411314 T 34 CATAB v2.0f-lin.ifort 2021-Apr-13 01:10:18 2021-Apr-13 01:10
2154-Jul-28 21:52 00:04 Jupiter 1.88762448862429 1.88762303540899 1.88762594184066 2.39837553464416 2.20335133356535 2508001.411013396 3.59759647195897 126.122984379184 3.28279313244011 -89.9101864552603 3069081.55085025 T 34 CATAB v2.0f-lin.ifort 2021-Apr-13 01:10:18 2021-Apr-13 01:10
2163-Jul-20 10:31 00:03 Jupiter 1.85055453304515 1.85055257712505 1.85055648897219 3.39514614798014 3.25754382176754 2511279.938185887 3.41629987407343 208.657753032128 10.2233389224021 -66.5953240958413 6391556.00498497 T 34 CATAB v2.0f-lin.ifort 2021-Apr-13 01:10:18 2021-Apr-13 01:10

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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