+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   5102 Benfranklin (1986 RD1) Classification: Main-belt Asteroid          SPK-ID: 2005102 [ 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 38 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1942258405713521 3.952e-08   a 2.8019125422902 9.9784e-09 au q 2.257708723556472 1.0961e-07 au i 8.103677541188075 4.3374e-06 deg node 317.245946441579 2.2835e-05 deg peri 53.19566934562258 2.5356e-05 deg M 92.66082459794009 9.1186e-06 deg tp 2458759.565632889285 (2019-Oct-03.06563289) 4.3565e-05 TDB period 1713.090433293921 4.69 9.1512e-06 2.505e-08 d yr n .2101465240850093 1.1226e-09 deg/d Q 3.346116361023928 1.1916e-08 au   Orbit Determination Parameters    # obs. used (total)      2534      data-arc span      29752 days (81.46 yr)      first obs. used      1939-08-08      last obs. used      2021-01-21      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .46305      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 01:22:27   Additional Information  Earth MOID = 1.2661 au   Jupiter MOID = 2.18143 au   T_jup = 3.282  [ 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 12.79   n/a E2021B10   diameter diameter 16.727 km 0.276 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   geometric albedo albedo 0.041   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   SMASSII spectral type spec_B B   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) 5102 Benfranklin (1986 RD1)          Discovered 1986-Sep-02 by Mrkos, A. at Klet Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1986 RD1 = 1930 UA1 = 1939 PB = 1988 AJ1  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Feb-25 17:11 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin