+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   80P/Peters-Hartley Classification: Jupiter-family Comet          SPK-ID: 1000067 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] alternate orbits: [epoch=2014-Sep-08.0] 17 (default) [epoch=1990-Jul-08.0] SAO/1990 [epoch=1982-Apr-21.0] SAO/1982 [epoch=1846-May-24.0] SAO/1846 Orbital Elements at Epoch 2456908.5 (2014-Sep-08.0) TDB Reference: JPL 17 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .5989902415048468 1.9223e-06   a 4.021659589584823 1.0432e-05 au q 1.612724740769127 6.2601e-06 au i 29.92275599280534 0.00011866 deg node 259.8892998524929 0.00019231 deg peri 339.1311051464525 0.00086019 deg M 352.2961693179048 0.00032108 deg tp 2456971.539188830275 (2014-Nov-10.03918883) 0.0028567 TDB period 2945.821230422856 8.07 0.011462 3.138e-05 d yr n .1222070084505176 4.7549e-07 deg/d Q 6.43059443840052 1.668e-05 au Additional Model Parameters  Parameter Value Uncertainty (1-sigma)  A1 [EST] 7.370111226638529E-9 1.014E-9 A2 [EST] -7.828764110205031E-10 3.122E-12 A3 [EST] -1.023511746192518E-9 4.164E-10   Orbit Determination Parameters    # obs. used (total)      48      data-arc span      11703 days (32.04 yr)      first obs. used      1982-07-11      last obs. used      2014-07-26      planetary ephem.      DE431      SB-pert. ephem.      SB431-BIG16      condition code      2      norm. resid. RMS      .81327      source      ORB      producer      Ryan S. Park      solution date      2014-Aug-29 12:57:29   Additional Information  Earth MOID = .620458 au   Jupiter MOID = .454638 au   T_jup = 2.514  [ 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 9.3   0.6 17 2 parameter fit from 17 observations, autocmod 2.5c comet total magnitude slope K1 27.   n/a 17 autocmod 2.5c 80P/Peters-Hartley          Discovered 1846-Jun-26 by Peters, C. at Naples (Capodimonte) Reference: http://articles.adsabs.harvard.edu/pdf/1846AN.....24..387P Last Updated: 2018-12-10 [ show close-approach data ] Alternate Designations  Perihelion  Year (est.)  New-Style  Desig Roman  Numeral  Year/  Letter   1990.7       1990 IX   1990d   1982.6   80P/1982 N1   1982 III   1982h   1845.5   80P/1846 M1   1846 VI    [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-18 13:03 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin