+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   284P/McNaught Classification: Jupiter-family Comet          SPK-ID: 1002452 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2455364.5 (2010-Jun-17.0) TDB Reference: JPL 63 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .378282265685388 4.5339e-07   a 3.671705087170562 1.8973e-07 au q 2.282764167867117 1.7706e-06 au i 11.87390871232397 1.4979e-05 deg node 144.3645670617869 5.755e-05 deg peri 202.7676674604866 0.00011612 deg M 144.8207017271704 4.4512e-05 deg tp 2454330.719679578275 (2007-Aug-18.21967958) 0.00037263 TDB period 2569.804668209244 7.04 0.00019918 5.453e-07 d yr n .1400884683779738 1.0858e-08 deg/d Q 5.060646006474006 2.615e-07 au Additional Model Parameters  Parameter Value Uncertainty (1-sigma)  A1 [EST] 7.774230491208296E-9 2.98E-9 A2 [EST] -2.891174738738197E-10 1.597E-10 A3 [EST] -5.51791598126629E-9 5.977E-10   Orbit Determination Parameters    # obs. used (total)      1831      data-arc span      4819 days (13.19 yr)      first obs. used      2007-04-17      last obs. used      2020-06-26      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .59612      source      ORB      producer      Shantanu Naidu      solution date      2020-Jul-09 16:11:44   Additional Information  Earth MOID = 1.27995 au   Jupiter MOID = .419105 au   T_jup = 2.939  [ 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 7.5   1. 63 2 parameter fit from 347 observations, autocmod 2.8 comet total magnitude slope K1 20.5   n/a 63 autocmod 2.8 comet nuclear magnitude M2 13.5   0.8 63 from 1302 observations, autocmod 2.8 comet nuclear magnitude slope K2 5.   n/a 63 autocmod 2.8 comet nuclear phase coefficient PC 0.03   n/a 63 autocmod 2.8 [ show close-approach data ] Alternate Designations  Perihelion  Year (est.)  New-Style  Desig Roman  Numeral  Year/  Letter   2014.7   284P/2013 J1         2007.6   284P/2007 H1        [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] 2021-Mar-05 11:20 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin