+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 31 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1388427742778907 2.763e-08   a 2.154825280228741 5.3015e-09 au q 1.855643360237649 5.7848e-08 au i 2.764710958446608 2.982e-06 deg node 178.3359436865309 7.2669e-05 deg peri 351.6128738173351 7.4303e-05 deg M 237.4391128938518 1.6998e-05 deg tp 2459593.838008763364 (2022-Jan-14.33800876) 5.5372e-05 TDB period 1155.357851091368 3.16 4.2637e-06 1.167e-08 d yr n .3115917718998826 1.1499e-09 deg/d Q 2.454007200219832 6.0375e-09 au   Orbit Determination Parameters    # obs. used (total)      2323      data-arc span      12408 days (33.97 yr)      first obs. used      1987-02-23      last obs. used      2021-02-12      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .48264      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 00:52:13   Additional Information  Earth MOID = .86126 au   Jupiter MOID = 2.51213 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 14.87   n/a E2021B10   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 ] 2021-Apr-23 07:24 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin