+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   326P/Hill Classification: Jupiter-family Comet          SPK-ID: 1002486 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2456125.5 (2012-Jul-17.0) TDB Reference: JPL 19 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .3182112079161584 9.2428e-07   a 4.072726914735172 1.6927e-07 au q 2.776739563684644 3.8533e-06 au i 2.470573216101709 1.9565e-05 deg node 99.82132354216186 0.0010534 deg peri 278.8376448014993 0.0011562 deg M 217.0800833824003 0.00022053 deg tp 2457317.336320773580 (2015-Oct-21.83632077) 0.0018837 TDB period 3002.108352935133 8.22 0.00018716 5.124e-07 d yr n .1199157251096655 7.4759e-09 deg/d Q 5.3687142657857 2.2313e-07 au   Orbit Determination Parameters    # obs. used (total)      184      data-arc span      9622 days (26.34 yr)      first obs. used      1990-09-24      last obs. used      2017-01-27      planetary ephem.      DE431      SB-pert. ephem.      SB431-BIG16      condition code      1      norm. resid. RMS      .66504      source      ORB      producer      Otto Matic      solution date      2017-Mar-08 15:47:23   Additional Information  Earth MOID = 1.77896 au   Jupiter MOID = .145747 au   T_jup = 2.953  [ 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 13.9   0.8 19 2 parameter fit from 126 observations, autocmod 2.6g comet total magnitude slope K1 10.   n/a 19 autocmod 2.6g comet nuclear magnitude M2 16.2   0.4 19 from 41 observations, autocmod 2.6g comet nuclear magnitude slope K2 5.   n/a 19 autocmod 2.6g comet nuclear phase coefficient PC 0.03   n/a 19 autocmod 2.6g [ show close-approach data ] Alternate Designations  Perihelion  Year (est.)  New-Style  Desig Roman  Numeral  Year/  Letter   2015.8   326P/2015 P1         2007.6   326P/2007 V2        [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] 2021-Mar-05 11:00 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin