+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   18984 Olathe (2000 RA8) Classification: Outer Main-belt Asteroid          SPK-ID: 2018984 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 26 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .02978348674201628 4.0384e-08   a 3.251536974454054 2.262e-08 au q 3.154694866084226 1.3245e-07 au i 14.05768084393163 5.0786e-06 deg node 321.6048990330338 1.6464e-05 deg peri 249.2565233368981 8.7151e-05 deg M 282.1784746443348 8.7332e-05 deg tp 2459463.444267228202 (2021-Sep-05.94426723) 0.00052017 TDB period 2141.566044105048 5.86 2.2348e-05 6.119e-08 d yr n .1681012831665636 1.7542e-09 deg/d Q 3.348379082823882 2.3294e-08 au   Orbit Determination Parameters    # obs. used (total)      1610      data-arc span      16394 days (44.88 yr)      first obs. used      1975-06-01      last obs. used      2020-04-19      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .48054      source      ORB      producer      Otto Matic      solution date      2020-May-20 04:55:50   Additional Information  Earth MOID = 2.1857 au   Jupiter MOID = 1.72565 au   T_jup = 3.133  [ 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 12.9   n/a MPO337418   diameter diameter 17.629 km 0.172 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.038   0.003 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   18984 Olathe           Discovered 2000 Sept. 2 by L. Robinson at the Sunflower Observatory. O-Lay'-tha is the old Shawnee word for "Beautiful". The township of Olathe, Kansas, was established in 1857 and later became a stop along the Santa Fe Trail. It is the site of the Sunflower Observatory. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20010109/MPCPages.arc Last Updated: 2009-05-11 [ show close-approach data ] Alternate Designations  2000 RA8 = 1975 LG1 = 1994 RS11  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Aug-10 02:42 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin