+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   15713 (1989 SM4) Classification: Main-belt Asteroid          SPK-ID: 2015713 [ 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 23 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1352652535651586 4.2215e-08   a 3.047519811607277 1.8285e-08 au q 2.635296271545374 1.357e-07 au i 2.520625643156074 4.1736e-06 deg node 108.957818457095 9.8901e-05 deg peri 245.1294267369436 0.00010006 deg M 297.3886635061213 1.6803e-05 deg tp 2459338.462649989336 (2021-May-03.96264999) 9.1928e-05 TDB period 1943.203272909785 5.32 1.7488e-05 4.788e-08 d yr n .1852611124213115 1.6673e-09 deg/d Q 3.45974335166918 2.0758e-08 au   Orbit Determination Parameters    # obs. used (total)      1355      data-arc span      11222 days (30.72 yr)      first obs. used      1989-09-26      last obs. used      2020-06-17      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .52998      source      ORB      producer      Otto Matic      solution date      2020-Jun-23 17:52:14   Additional Information  Earth MOID = 1.63152 au   Jupiter MOID = 1.97386 au   T_jup = 3.222  [ 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 13.8   n/a MPO347648   diameter diameter 8.112 km 0.136 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.097   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   15713 (1989 SM4)          Discovered 1989-Sep-26 by Elst, E. W. at La Silla Reference: 20000726/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1989 SM4 = 1993 KM3 = 1994 PP23  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Oct-25 00:35 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin