+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   15000 CCD (1997 WZ16) Classification: Main-belt Asteroid          SPK-ID: 2015000 [ 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 27 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1085480398289032 3.9443e-08   a 2.764052514561162 1.3923e-08 au q 2.464020032121397 1.0665e-07 au i 8.268194813271098 4.2271e-06 deg node 247.0565503361543 2.8576e-05 deg peri 338.162880045741 3.4373e-05 deg M 129.7163953465778 1.9851e-05 deg tp 2458395.702158146020 (2018-Oct-04.20215815) 9.1668e-05 TDB period 1678.486535843881 4.60 1.2682e-05 3.472e-08 d yr n .2144789322477379 1.6205e-09 deg/d Q 3.064084997000927 1.5434e-08 au   Orbit Determination Parameters    # obs. used (total)      1298      data-arc span      21945 days (60.08 yr)      first obs. used      1960-10-17      last obs. used      2020-11-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .53151      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 02:58:29   Additional Information  Earth MOID = 1.45626 au   Jupiter MOID = 1.94587 au   T_jup = 3.317  [ 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 14.3   n/a MPO299071   diameter diameter 3.607 km 0.268 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.284   0.067 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   15000 CCD           Discovered 1997 Nov. 23 by Spacewatch at Kitt Peak. A charge-coupled device, a two-dimensional array of light-sensitive microelectronic semiconductor capacitors, is used as an imaging detector. With its high sensitivity and stability, the CCD has almost completely replaced the photographic emulsion and photomultiplier as the detector of choice in quantitative scientific work. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20001111/MPCPages.arc Last Updated: 2013-03-29 [ show close-approach data ] Alternate Designations  1997 WZ16 = 1991 LR2  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-28 06:53 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin