+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   119P/Parker-Hartley Classification: Jupiter-family Comet          SPK-ID: 1000120 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2455072.5 (2009-Aug-29.0) TDB Reference: JPL 51 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2906392019630723 1.015e-07   a 4.283706862364677 8.7533e-08 au q 3.038693718443271 4.7275e-07 au i 5.191035413678438 8.0316e-06 deg node 244.0747717582044 8.0591e-05 deg peri 181.0994002470446 9.4066e-05 deg M 173.3366942404771 3.101e-05 deg tp 2453513.248925846395 (2005-May-22.74892585) 0.00028472 TDB period 3238.381746893945 8.87 9.9259e-05 2.718e-07 d yr n .1111666344912207 3.4073e-09 deg/d Q 5.528720006286084 1.1297e-07 au Additional Model Parameters  Parameter Value Uncertainty (1-sigma)  A1 [EST] 2.869568668291466E-8 7.115E-9 A2 [EST] 9.82989861460121E-9 2.073E-10   Orbit Determination Parameters    # obs. used (total)      1716      data-arc span      10777 days (29.51 yr)      first obs. used      1986-09-29      last obs. used      2016-04-01      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .73025      source      ORB      producer      Otto Matic      solution date      2021-Apr-15 23:27:37   Additional Information  Earth MOID = 2.0524 au   Jupiter MOID = .177476 au   T_jup = 2.944  [ 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 12.1   0.9 51 2 parameter fit from 604 observations, autocmod 2.9c comet total magnitude slope K1 7.75   n/a 51 autocmod 2.9c comet nuclear magnitude M2 13.9   0.6 51 from 894 observations, autocmod 2.9c comet nuclear magnitude slope K2 5.   n/a 51 autocmod 2.9c comet nuclear phase coefficient PC 0.03   n/a 51 autocmod 2.9c 119P/Parker-Hartley          Discovered 1989-Mar-02 by Parker, Quentin A. and Hartley, Malcolm at U. K. Schmidt Telescope, Siding Spring Obs. 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   1996.5   119P/1995 M2         1987.7   119P/1989 E1   1987 XXXVI   1989i  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-20 08:40 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin