+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   15228 Ronmiller (1987 DG) Classification: Main-belt Asteroid          SPK-ID: 2015228 [ 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 25 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1387690063144144 2.8176e-08   a 2.15487645613201 5.5366e-09 au q 1.855846391584244 5.8963e-08 au i 2.764644589908996 3.0446e-06 deg node 178.3358055492465 8.6173e-05 deg peri 351.6533099462198 8.7776e-05 deg M 175.0664966887614 1.7772e-05 deg tp 2458438.634286228530 (2018-Nov-16.13428623) 5.614e-05 TDB period 1155.399009996379 3.16 4.4529e-06 1.219e-08 d yr n .3115806720321911 1.2008e-09 deg/d Q 2.453906520679776 6.3049e-09 au   Orbit Determination Parameters    # obs. used (total)      1934      data-arc span      12213 days (33.44 yr)      first obs. used      1987-02-23      last obs. used      2020-08-01      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .5089      source      ORB      producer      Otto Matic      solution date      2020-Aug-25 00:58:07   Additional Information  Earth MOID = .861815 au   Jupiter MOID = 2.51317 au   T_jup = 3.688  [ 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 14.8   n/a MPO319274   diameter diameter 2.410 km 0.462 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.440   0.115 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   15228 Ronmiller           Discovered 1987 Feb. 23 by C. S. Shoemaker and E. M. Shoemaker at Palomar. Ron Miller (b. 1955) is a forester for the Bureau of Indian Affairs. He maintains woodland areas and cultural resources for Native Americans. He runs sled dogs in Alaska, Colorado and Arizona and is a teacher and mentor for those entering the sport of dog sledding. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20020624/MPCPages.arc Last Updated: 2003-10-02 [ show close-approach data ] Alternate Designations  1987 DG = 1990 DK5 = 1998 VU12  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Oct-21 01:20 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin