+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 22 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .3016970137847573 4.1961e-08   a 2.288343471899786 9.4639e-09 au q 1.597957079913777 9.892e-08 au i 3.130124204057705 4.582e-06 deg node 263.9581870893386 8.0603e-05 deg peri 86.78727596400816 8.1085e-05 deg M 173.5934111213469 1.0106e-05 deg tp 2458590.807321572150 (2019-Apr-17.30732157) 3.3207e-05 TDB period 1264.387644762603 3.46 7.8437e-06 2.147e-08 d yr n .2847228075117677 1.7663e-09 deg/d Q 2.978729863885795 1.2319e-08 au   Orbit Determination Parameters    # obs. used (total)      569      data-arc span      10754 days (29.44 yr)      first obs. used      1991-10-05      last obs. used      2021-03-15      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .55462      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 15:36:55   Additional Information  Earth MOID = .59441 au   Jupiter MOID = 2.47591 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 16.06   n/a E2021B55   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 ] 2021-Apr-18 06:56 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin