+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   15247 (1989 WS) Classification: Main-belt Asteroid          SPK-ID: 2015247 [ 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 24 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1928401823642442 5.6559e-08   a 2.568259605556552 1.0779e-08 au q 2.072995954862304 1.4113e-07 au i 8.745676794196012 4.5663e-06 deg node 237.2276522301716 2.5607e-05 deg peri 159.2466368955723 2.7418e-05 deg M 155.6905919096727 1.086e-05 deg tp 2458350.345343302015 (2018-Aug-19.84534330) 4.4263e-05 TDB period 1503.338599592884 4.12 9.4646e-06 2.591e-08 d yr n .2394670103578068 1.5076e-09 deg/d Q 3.063523256250799 1.2858e-08 au   Orbit Determination Parameters    # obs. used (total)      1522      data-arc span      21797 days (59.68 yr)      first obs. used      1960-09-24      last obs. used      2020-05-29      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .50533      source      ORB      producer      Otto Matic      solution date      2020-Jun-23 17:48:57   Additional Information  Earth MOID = 1.08325 au   Jupiter MOID = 2.36419 au   T_jup = 3.389  [ 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 MPO332961   diameter diameter 4.407 km 1.036 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   geometric albedo albedo 0.301   0.172 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   15247 (1989 WS)          Discovered 1989-Nov-20 by Ueda, S., Kaneda, H. at Kushiro Reference: 20000621/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1989 WS = 1993 TZ12  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Sep-22 07:20 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin