+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   11500 Tomaiyowit (1989 UR) Classification: Apollo [NEO, PHA]          SPK-ID: 2011500 [ 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 209 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .3558396905673628 3.6395e-08   a 1.079754280747829 6.9049e-10 au q .6955348515977359 3.8985e-08 au i 10.30840193065735 3.2943e-06 deg node 234.420238952373 1.1378e-05 deg peri 289.4704010827379 1.2063e-05 deg M 173.9211257101999 5.9453e-06 deg tp 2459002.513460184672 (2020-Jun-02.01346018) 6.6722e-06 TDB period 409.8130922420663 1.12 3.931e-07 1.076e-09 d yr n .8784492414101722 8.4263e-10 deg/d Q 1.463973709897922 9.3619e-10 au   Orbit Determination Parameters    # obs. used (total)      1199      # delay obs. used      0      # Doppler obs. used      1      data-arc span      10889 days (29.81 yr)      first obs. used      1989-10-25      last obs. used      2019-08-18      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .42669      source      ORB      producer      Otto Matic      solution date      2019-Sep-30 06:41:07   Additional Information  Earth MOID = .0341646 au   Jupiter MOID = 3.54442 au   T_jup = 5.657  [ 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 18.3   n/a MPO435808   diameter diameter 0.738 km 0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2011ApJ...743..156M)   rotation period rot_per 73.0 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Pravec, P.; Wolf, M.; Sarounova, L. (1998) http://www.asu.cas.cz/~ppravec/neo.htm] geometric albedo albedo 0.142   0.024 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2011ApJ...743..156M)   SMASSII spectral type spec_B S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002) 11500 Tomaiyowit           Discovered 1989 Oct. 28 by J. E. Mueller and J. D. Mendenhall at Palomar. Tomaiyowit is Earth Mother in the Luiseno creation story. She, together with Tukmit, gave birth to the First People, which are all things and features of the earth forming the basis of Luiseno existence. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20081113/MPCPages.arc Last Updated: 2008-11-17 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-12 15:04 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin