+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   73P/Schwassmann-Wachmann 3-L Classification: Jupiter-family Comet [NEO]          SPK-ID: 1002334 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2453839.5 (2006-Apr-14.0) TDB Reference: JPL 7 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.694735674965028 7.8807e-05   a 3.07631556437795 0.0007884 au q 0.939089394354414 2.9457e-06 au i 11.3987127952321 0.00054599 deg node 69.93678268425323 0.0019206 deg peri 198.7475944367357 0.0020232 deg M 349.8933270105301 0.0040119 deg tp 2453894.828699747282 (2006-Jun-08.32869975) 0.00069859 TDB period 1970.809971765627 5.40 0.75762 0.002074 d yr n .1826660130390349 7.0221e-05 deg/d Q 5.213541734401494 0.0013361 au   Orbit Determination Parameters    # obs. used (total)      39      data-arc span      58 days      first obs. used      2006-03-05      last obs. used      2006-05-02      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      6      norm. resid. RMS      1.2502      source      ORB      producer      Nick Mastrodemos      solution date      2006-May-07 19:12:36   Additional Information  Earth MOID = .0406543 au   T_jup = 2.776  [ 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 comet total magnitude M1 20.9   2.4 6 2 parameter fit from 5 observations comet total magnitude slope K1 10.0   n/a 6 2 parameter fit from 5 observations comet nuclear magnitude M2 21.7   0.5 6 from 6 observations comet nuclear magnitude slope K2 5.0   n/a 6 from 6 observations [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-18 13:24 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin