+ 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 ] [ show orbit diagram ] Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 28 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1928958842067981 3.7494e-08   a 2.568458922358305 9.4925e-09 au q 2.07301376748116 9.4204e-08 au i 8.745266724049763 6.072e-07 deg node 237.2242333352708 3.7897e-06 deg peri 159.1580884217514 4.5012e-06 deg M 250.6456133584315 7.4312e-06 deg tp 2459853.210579231546 (2022-Sep-30.71057923) 3.291e-05 TDB period 1503.513609035762 4.12 8.335e-06 2.282e-08 d yr n .2394391363247296 1.3274e-09 deg/d Q 3.063904077235449 1.1324e-08 au   Orbit Determination Parameters    # obs. used (total)      1593      data-arc span      22190 days (60.75 yr)      first obs. used      1960-09-24      last obs. used      2021-06-26      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .51143      source      ORB      producer      Otto Matic      solution date      2021-Jul-08 03:46:12   Additional Information  Earth MOID = 1.08266 au   Jupiter MOID = 2.36625 au   T_jup = 3.389  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 13.84   n/a MPO614063   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 Alternate Designations  1989 WS = 1993 TZ12  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Aug-04 05:30 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin