+ 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 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 33 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .02936782199093384 3.9941e-08   a 3.250212736128467 1.9556e-08 au q 3.15476106706118 1.3065e-07 au i 14.05869529545674 4.6692e-06 deg node 321.6054614946218 1.5091e-05 deg peri 249.5530427242492 7.4421e-05 deg M 348.4474372178358 7.2588e-05 deg tp 2459465.181843740871 (2021-Sep-07.68184374) 0.00043143 TDB period 2140.257898869589 5.86 1.9316e-05 5.288e-08 d yr n .1682040282108711 1.5181e-09 deg/d Q 3.345664405195754 2.013e-08 au   Orbit Determination Parameters    # obs. used (total)      2056      data-arc span      16818 days (46.05 yr)      first obs. used      1975-06-01      last obs. used      2021-06-17      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .46041      source      ORB      producer      Otto Matic      solution date      2021-Jul-08 04:44:41   Additional Information  Earth MOID = 2.18659 au   Jupiter MOID = 1.72693 au   T_jup = 3.134  [ 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-Jul-31 15:41 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin