+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   130P/McNaught-Hughes Classification: Jupiter-family Comet          SPK-ID: 1000134 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] alternate orbits: [epoch=2011-Aug-24.0] 44 (default) [epoch=1998-Mar-08.0] SAO/1998 [epoch=1991-Jul-03.0] SAO/1991 Orbital Elements at Epoch 2455797.5 (2011-Aug-24.0) TDB Reference: JPL 44 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .406738707574909 9.6472e-08   a 3.536509937680266 1.9193e-07 au q 2.098074456302373 3.261e-07 au i 7.307309105263396 6.398e-06 deg node 89.81289187480661 6.5508e-05 deg peri 224.3736637933758 7.8331e-05 deg M 8.922286273971444 1.2794e-05 deg tp 2455737.294744488128 (2011-Jun-24.79474449) 8.5209e-05 TDB period 2429.185896837016 6.65 0.00019775 5.414e-07 d yr n .1481977976525993 1.2064e-08 deg/d Q 4.97494541905816 2.6999e-07 au Additional Model Parameters  Parameter Value Uncertainty (1-sigma)  A1 [EST] 3.563459882542453E-10 8.947E-11 A2 [EST] 3.596247524528032E-13 3.874E-12   Orbit Determination Parameters    # obs. used (total)      1132      data-arc span      10010 days (27.41 yr)      first obs. used      1991-09-14      last obs. used      2019-02-09      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .6786      source      ORB      producer      Davide Farnocchia      solution date      2019-May-15 16:21:44   Additional Information  Earth MOID = 1.09113 au   Jupiter MOID = .479954 au   T_jup = 2.965  [ 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 13.3   0.9 44 2 parameter fit from 351 observations, autocmod 2.6q comet total magnitude slope K1 9.   n/a 44 autocmod 2.6q diameter diameter 4.2 km n/a Scotti,J (1994) BAAS 26:1375   130P/McNaught-Hughes          Discovered 1991-Sep-30 by McNaught, Robert H. at U. K. Schmidt Telescope Unit, Siding Spring discovered on plate/photo taken on discovery date Reference: comet.dis Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  Perihelion  Year (est.)  New-Style  Desig Roman  Numeral  Year/  Letter   1998.2   130P/1997 H1         1991.5   130P/1991 S1   1991 IX   1991y  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-23 15:20 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin