+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   16669 Rionuevo (1993 XK3) Classification: Inner Main-belt Asteroid          SPK-ID: 2016669 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 34 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .08484623726972156 1.3252e-08   a 1.933866468237976 4.7256e-09 au q 1.769785175025898 2.4017e-08 au i 24.59633828476629 1.0323e-06 deg node 67.53065348329875 2.2907e-06 deg peri 329.3347994712464 7.9844e-06 deg M 137.6106657104975 8.7927e-06 deg tp 2459021.019189524601 (2020-Jun-20.51918952) 2.3652e-05 TDB period 982.2864461357811 2.69 3.6005e-06 9.858e-09 d yr n .3664918735427988 1.3433e-09 deg/d Q 2.097947761450053 5.1266e-09 au   Orbit Determination Parameters    # obs. used (total)      2107      data-arc span      14119 days (38.66 yr)      first obs. used      1982-10-17      last obs. used      2021-06-13      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .38361      source      ORB      producer      Otto Matic      solution date      2021-Jul-08 04:11:32   Additional Information  Earth MOID = .796619 au   Jupiter MOID = 3.2419 au   T_jup = 3.795  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.61   n/a MPCxxxxx   diameter diameter 3.975 km 0.095 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   rotation period rot_per 4.953 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Warner, B.D. (2010) Minor Planet Bull. 37, 57-64.] [Warner, B.D. (2013) Minor Planet Bull. 40, 137-145.] [Warner, B.D. (2016) Minor Planet Bull. 43, 227-233.] [Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.] [Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.] geometric albedo albedo 0.309   0.057 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   16669 Rionuevo           Discovered 1993 Dec. 8 by C. S. Shoemaker and D. H. Levy at Palomar. In an effort to understand its history stretching back at least 2500 years, Tucson's Rio Nuevo project is preserving and developing the city's heritage. With help from the University of Arizona, the site will benefit all students of the history of the American Southwest. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20030501/MPCPages.arc Last Updated: 2003-10-02 Alternate Designations  1993 XK3 = 1999 AF3  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Aug-02 01:51 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin