+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   150838 (2001 SW45) Classification: Main-belt Asteroid          SPK-ID: 2150838 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 11 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2334616311079259 5.1181e-08   a 2.554290836639902 1.5037e-08 au q 1.957961931593921 1.3368e-07 au i 3.750017039463338 5.0518e-06 deg node 98.32570279730497 8.7579e-05 deg peri 271.0971440842917 8.8715e-05 deg M 252.716662144096 1.9407e-05 deg tp 2459644.858734459555 (2022-Mar-06.35873446) 8.3581e-05 TDB period 1491.090299784481 4.08 1.3167e-05 3.605e-08 d yr n .241434070124414 2.1319e-09 deg/d Q 3.150619741685882 1.8547e-08 au   Orbit Determination Parameters    # obs. used (total)      244      data-arc span      6818 days (18.67 yr)      first obs. used      2001-08-27      last obs. used      2020-04-27      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .65259      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 19:20:15   Additional Information  Earth MOID = .960288 au   Jupiter MOID = 2.31955 au   T_jup = 3.397  [ 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 16.89   n/a E2021B55   150838 (2001 SW45)          Discovered 2001-Sep-16 by LINEAR at Socorro Reference: 20070303/Numbers.arc Last Updated: 2007-03-07 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-18 15:49 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin