+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   15806 Kohei (1994 GN1) Classification: Main-belt Asteroid          SPK-ID: 2015806 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2457800.5 (2017-Feb-16.0) TDB Reference: JPL 18 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1176697952904561 5.0289e-08   a 3.018054156301832 2.6738e-08 au q 2.662920341554285 1.4547e-07 au i 10.3300152480706 5.1578e-06 deg node 128.9986774339301 2.8995e-05 deg peri 43.00197693533512 3.684e-05 deg M 163.3275253529742 2.1634e-05 deg tp 2456931.647908596376 (2014-Oct-01.14790860) 0.00011639 JED period 1915.08903492738 5.24 2.545e-05 6.968e-08 d yr n .1879808162619714 2.4981e-09 deg/d Q 3.373187971049379 2.9884e-08 au   Orbit Determination Parameters    # obs. used (total)      1276      data-arc span      12232 days (33.49 yr)      first obs. used      1983-02-15      last obs. used      2016-08-12      planetary ephem.      DE431      SB-pert. ephem.      SB431-BIG16      condition code      0      fit RMS      .47773      data source      ORB      producer      Otto Matic      solution date      2016-Aug-22 12:50:29   Additional Information  Earth MOID = 1.68078 au   Jupiter MOID = 1.65222 au   T_jup = 3.212  [ 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 12.7 mag n/a MPO337392   diameter diameter 9.653 km 0.147 EAR_A_COMPIL_5_NEOWISEDIAM_V1_0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   rotation period rot_per 145.7002 h n/a LCDB (Rev. 2016-September); 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. (2016) Astron. J. 150, A75.] geometric albedo albedo 0.157   0.017 EAR_A_COMPIL_5_NEOWISEDIAM_V1_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 2015-08-29 Last Updated: 2015-09-02 [ show close-approach data ] Alternate Designations  1994 GN1 = 1983 CT2 = 1999 HT3  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2017-Jan-08 03:21 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin