+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   73P/Schwassmann-Wachmann 3-N Classification: Jupiter-family Comet [NEO]          SPK-ID: 1002338 [ 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 14 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.692288993783599 0.00012341   a 3.05239117034204 0.0012047 au q 0.939254358392007 6.1686e-06 au i 11.3809412138733 0.0010068 deg node 69.89730281276252 0.0017606 deg peri 198.7643511012408 0.0016084 deg M 349.7850410923837 0.0062388 deg tp 2453894.770428668092 (2006-Jun-08.27042867) 0.0010368 TDB period 1947.864352707054 5.33 1.1532 0.003157 d yr n .1848177977587034 0.00010942 deg/d Q 5.165527982292075 0.0020387 au   Orbit Determination Parameters    # obs. used (total)      133      data-arc span      41 days      first obs. used      2006-03-23      last obs. used      2006-05-03      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      6      norm. resid. RMS      1.1812      source      ORB      producer      Nick Mastrodemos      solution date      2006-Aug-22 12:46:16   Additional Information  Earth MOID = .0405265 au   T_jup = 2.788  [ 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 20.4   1.0 10 2 parameter fit from 21 observations comet total magnitude slope K1 10.0   n/a 10 2 parameter fit from 21 observations comet nuclear magnitude M2 21.2   0.9 10 from 13 observations comet nuclear magnitude slope K2 5.0   n/a 10 from 13 observations [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-17 22:17 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin