+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   P/2012 O2 (McNaught) Classification: Jupiter-family Comet          SPK-ID: 1003200 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2456139.5 (2012-Jul-31.0) TDB Reference: JPL 9 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .5382710102096243 1.7238e-05   a 3.596989187297545 0.00015146 au q 1.6608341837378 9.2178e-06 au i 24.52745486680309 0.00030657 deg node 120.8135816327748 0.00025099 deg peri 183.0473914904109 0.00060768 deg M 5.186765158058672 0.00028619 deg tp 2456103.599441127633 (2012-Jun-25.09944113) 0.00097688 TDB period 2491.765252562438 6.82 0.15738 0.0004309 d yr n .1444758889826357 9.1254e-06 deg/d Q 5.53314419085729 0.00023299 au   Orbit Determination Parameters    # obs. used (total)      81      data-arc span      124 days      first obs. used      2012-05-20      last obs. used      2012-09-21      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      4      norm. resid. RMS      .3883      source      ORB      producer      Otto Matic      solution date      2021-Apr-15 23:32:20   Additional Information  Earth MOID = .645459 au   Jupiter MOID = .259083 au   T_jup = 2.722  [ 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 17.3   0.6 9 from 50 observations, assumed slope, autocmod 2.9c comet total magnitude slope K1 10.   n/a 9 autocmod 2.9c [ show close-approach data ] Alternate Designations  Perihelion  Year (est.)  New-Style  Desig Roman  Numeral  Year/  Letter   2012.5   P/2012 O2        [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] 2021-Apr-17 09:52 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin