+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   73P/Schwassmann-Wachmann 3-AH Classification: Jupiter-family Comet [NEO]          SPK-ID: 1002356 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2453839.5 (2006-Apr-14.0) TDB Reference: JPL 3 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.69335823324 0.041634   a 3.07520604461415 0.42167 au q 0.942986614671515 0.0022483 au i 11.330632437678 0.27926 deg node 70.70742060713012 1.4524 deg peri 197.7396253755624 1.5769 deg M 349.8328553284363 2.1387 deg tp 2453895.129641204721 (2006-Jun-08.62964120) 0.26154 TDB period 1969.743864244588 5.39 405.13 1.109 d yr n .1827648795027788 0.037591 deg/d Q 5.207425474556787 0.71404 au   Orbit Determination Parameters    # obs. used (total)      19      data-arc span      3 days      first obs. used      2006-04-05      last obs. used      2006-04-08      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      9      norm. resid. RMS      .99185      source      ORB      producer      Nick Mastrodemos      solution date      2006-Apr-21 22:37:20   Additional Information  Earth MOID = .0401536 au   T_jup = 2.778  [ 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 10:23 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin