+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   101465 (1998 WL12) Classification: Mars-crossing Asteroid          SPK-ID: 2101465 [ 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 21 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .301547211417998 4.2438e-08   a 2.288528772710088 9.4826e-09 au q 1.598429303049508 9.9905e-08 au i 3.130304736702889 5.0056e-06 deg node 263.9653581957729 8.1454e-05 deg peri 86.77528776115655 8.2026e-05 deg M 116.670198846622 1.0215e-05 deg tp 2458590.682566070772 (2019-Apr-17.18256607) 3.4477e-05 TDB period 1264.541225377312 3.46 7.8595e-06 2.152e-08 d yr n .2846882274578148 1.7694e-09 deg/d Q 2.978628242370668 1.2342e-08 au   Orbit Determination Parameters    # obs. used (total)      553      data-arc span      10347 days (28.33 yr)      first obs. used      1991-10-05      last obs. used      2020-02-02      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .56016      source      ORB      producer      Otto Matic      solution date      2020-Feb-24 01:20:34   Additional Information  Earth MOID = .596604 au   Jupiter MOID = 2.47526 au   T_jup = 3.536  [ 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 16.0   n/a MPO412743   diameter diameter 1.463 km 0.203 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)   geometric albedo albedo 0.329   0.116 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)   101465 (1998 WL12)          Discovered 1998-Nov-21 by LINEAR at Socorro Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ show close-approach data ] Alternate Designations  1998 WL12 = 1991 TC5  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Nov-26 22:38 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin