+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 27 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1929259942749454 3.8332e-08   a 2.568073400276477 9.7071e-09 au q 2.072625286157098 9.6029e-08 au i 8.746071615674973 6.0783e-07 deg node 237.2261393355469 3.7971e-06 deg peri 159.215746407109 4.5027e-06 deg M 203.6330560065217 7.3827e-06 deg tp 2459853.408050144755 (2022-Sep-30.90805015) 3.3592e-05 TDB period 1503.175108812736 4.12 8.5228e-06 2.333e-08 d yr n .2394930556589255 1.3579e-09 deg/d Q 3.063521514395856 1.158e-08 au   Orbit Determination Parameters    # obs. used (total)      1553      data-arc span      21821 days (59.74 yr)      first obs. used      1960-09-24      last obs. used      2020-06-22      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .50858      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 00:52:46   Additional Information  Earth MOID = 1.08186 au   Jupiter MOID = 2.36535 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 13.83   n/a E2021B10   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 ] 2021-Apr-14 07:07 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin