+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   213P/Van Ness-B Classification: Jupiter-family Comet          SPK-ID: 1003151 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2455791.5 (2011-Aug-18.0) TDB Reference: JPL 11 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .3797273022751771 4.5881e-05   a 3.422250471846395 0.00021829 au q 2.122728532462212 6.7295e-05 au i 10.24005100770656 0.00045556 deg node 312.6706695170379 0.0010415 deg peri 3.341503759615148 0.0079435 deg M 9.74101651092603 0.0022527 deg tp 2455728.929749505833 (2011-Jun-16.42974951) 0.018868 TDB period 2312.416794760032 6.33 0.22125 0.0006057 d yr n .155681277188336 1.4895e-05 deg/d Q 4.721772411230579 0.00030118 au   Orbit Determination Parameters    # obs. used (total)      115      data-arc span      77 days      first obs. used      2011-07-12      last obs. used      2011-09-27      planetary ephem.      DE431      SB-pert. ephem.      SB431-BIG16      condition code      5      norm. resid. RMS      .92217      source      ORB      producer      Otto Matic      solution date      2014-Jun-13 19:41:56   Additional Information  Earth MOID = 1.10881 au   T_jup = 2.997  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes comet total magnitude M1 7.3   0.7 11 from 68 observations, assumed slope, autocmod 2.5c comet total magnitude slope K1 37.   n/a 11 autocmod 2.5c comet nuclear magnitude M2 18.2   0.7 11 from 59 observations, autocmod 2.5c comet nuclear magnitude slope K2 5.   n/a 11 autocmod 2.5c comet nuclear phase coefficient PC 0.03   n/a 11 autocmod 2.5c [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] 2021-Apr-19 18:54 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin