+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   37786 Tokikonaruko (1997 SS17) Classification: Main-belt Asteroid          SPK-ID: 2037786 [ 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 21 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1399029860417697 4.2451e-08   a 2.191591036928986 8.1557e-09 au q 1.884980906680243 9.2342e-08 au i 4.564141316263944 3.822e-06 deg node 71.31847849955189 6.6224e-05 deg peri 317.2485685392768 6.8191e-05 deg M 48.22129678844983 1.7901e-05 deg tp 2459041.764492455002 (2020-Jul-11.26449245) 5.8583e-05 TDB period 1185.052798702145 3.24 6.615e-06 1.811e-08 d yr n .303783932997979 1.6957e-09 deg/d Q 2.49820116717773 9.2967e-09 au   Orbit Determination Parameters    # obs. used (total)      799      data-arc span      9007 days (24.66 yr)      first obs. used      1996-05-23      last obs. used      2021-01-19      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .55631      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 04:07:57   Additional Information  Earth MOID = .892008 au   Jupiter MOID = 2.93084 au   T_jup = 3.655  [ 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 16.0   n/a MPO436032   diameter diameter 1.390 km 0.386 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.399   0.216 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   37786 Tokikonaruko           Discovered 1997 Sept. 30 by Y. Ikari at Moriyama. Tokiko Naruko (1923-1995), a selfless volunteer, devoted herself to the social welfare activities in the City of Otsu. She later served as president of the Otsu City Volunteer Association. She was the daughter of Issei Yamamoto, who founded the Oriental Astronomical Association. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20071124/MPCPages.arc Last Updated: 2007-11-26 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Mar-02 05:38 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin