+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 30 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .02960563122827899 4.0026e-08   a 3.251026406902182 2.1696e-08 au q 3.154777717986039 1.3152e-07 au i 14.05849349711176 5.0417e-06 deg node 321.6049642823627 1.597e-05 deg peri 249.4156630734744 8.4348e-05 deg M 315.6295535395604 8.414e-05 deg tp 2459464.388503610727 (2021-Sep-06.88850361) 0.00050059 TDB period 2141.061649775444 5.86 2.1433e-05 5.868e-08 d yr n .1681408847044442 1.6832e-09 deg/d Q 3.347275095818325 2.2338e-08 au   Orbit Determination Parameters    # obs. used (total)      1749      data-arc span      16668 days (45.63 yr)      first obs. used      1975-06-01      last obs. used      2021-01-18      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .47851      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 02:41:07   Additional Information  Earth MOID = 2.18523 au   Jupiter MOID = 1.72596 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 13.02   n/a E2021B10   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 ] 2021-Apr-10 14:44 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin