+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   14221 (1999 WL) Classification: Main-belt Asteroid          SPK-ID: 2014221 [ 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 40 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .09930571562823987 1.9028e-08   a 2.251712090762744 5.5012e-09 au q 2.02810421020079 4.3392e-08 au i 6.076333848602126 1.0412e-06 deg node 99.17266708813588 6.0228e-06 deg peri 15.48010067189708 1.0964e-05 deg M 108.1753950181157 1.0522e-05 deg tp 2459025.653908999174 (2020-Jun-25.15390900) 3.5701e-05 TDB period 1234.149343646398 3.38 4.5227e-06 1.238e-08 d yr n .2916988951566832 1.069e-09 deg/d Q 2.475319971324699 6.0475e-09 au   Orbit Determination Parameters    # obs. used (total)      2340      data-arc span      15128 days (41.42 yr)      first obs. used      1980-01-23      last obs. used      2021-06-24      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .46808      source      ORB      producer      Otto Matic      solution date      2021-Jul-08 03:27:29   Additional Information  Earth MOID = 1.0457 au   Jupiter MOID = 2.59723 au   T_jup = 3.613  [ 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 14.36   n/a MPO614063   diameter diameter 3.465 km 0.049 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.337   0.075 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   14221 (1999 WL)          Discovered 1999-Nov-16 by Kobayashi, T. at Oizumi Reference: 20000320/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1999 WL = 1980 BX = 1980 DW1 = 1992 UK4 = 1996 WN3 = 1998 MP35  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jul-31 12:16 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin