+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   73P/Schwassmann-Wachmann 3-AB Classification: Jupiter-family Comet [NEO]          SPK-ID: 1002350 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2453856.5 (2006-May-01.0) TDB Reference: JPL 4 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.691246808725753 0.00044924   a 3.04180282124803 0.0043403 au q 0.939166328287337 2.6548e-05 au i 11.3731938601948 0.0038719 deg node 69.85894300547889 0.0049519 deg peri 198.8169658347176 0.0039608 deg M 352.8076642007583 0.016048 deg tp 2453895.213502916651 (2006-Jun-08.71350292) 0.0035229 TDB period 1937.737814113712 5.31 4.1473 0.01135 d yr n .1857836480136286 0.00039763 deg/d Q 5.144439314208728 0.0073404 au   Orbit Determination Parameters    # obs. used (total)      35      data-arc span      31 days      first obs. used      2006-04-02      last obs. used      2006-05-03      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      7      norm. resid. RMS      .68441      source      ORB      producer      Nick Mastrodemos      solution date      2006-May-07 14:05:05   Additional Information  Earth MOID = .0406154 au   T_jup = 2.794  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Discovery Circumstances | Close-Approach Data ] no physical parameters available [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Discovery Circumstances | Close-Approach Data ] 2021-Apr-19 08:33 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin