+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   18399 Tentoumushi (1992 WK1) Classification: Main-belt Asteroid          SPK-ID: 2018399 [ 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 .2022232859259511 6.9763e-09   a 3.153786136749798 1.1802e-08 au q 2.516017141068543 1.9227e-08 au i 18.29765295188305 2.517e-07 deg node 75.71438337592751 8.9833e-07 deg peri 330.0426647820599 6.2239e-06 deg M 7.928653869822349 4.8729e-06 deg tp 2459155.444922126056 (2020-Nov-01.94492213) 2.7628e-05 TDB period 2045.72280502181 5.60 1.1483e-05 3.144e-08 d yr n .1759769207813871 9.8778e-10 deg/d Q 3.791555132431053 1.4188e-08 au   Orbit Determination Parameters    # obs. used (total)      2241      data-arc span      11241 days (30.78 yr)      first obs. used      1990-05-25      last obs. used      2021-03-04      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .43383      source      ORB      producer      Otto Matic      solution date      2021-Mar-17 01:54:15   Additional Information  Earth MOID = 1.54214 au   Jupiter MOID = 1.62679 au   T_jup = 3.098  [ 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 12.39   n/a E2021B10   diameter diameter 22.987 km 0.095 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   geometric albedo albedo 0.048   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   18399 Tentoumushi           Discovered 1992 Nov. 17 by K. Endate and K. Watanabe at Kitami. The Tentoumushi astronomy club was named after the seven-starred ladybug. The club received an award from the city of Komatsu for its astronomy popularization. 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 2017-01-12 Last Updated: 2017-01-17 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-11 17:26 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin