+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   72P/Denning-Fujikawa Classification: Jupiter-family Comet [NEO]          SPK-ID: 1000020 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] alternate orbits: [epoch=2014-Nov-20.0] 21 (default) [epoch=1881-Aug-28.0] SAO/1881 Orbital Elements at Epoch 2456981.5 (2014-Nov-20.0) TDB Reference: JPL 21 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .8191545266363583 5.9575e-07   a 4.336084232317145 8.3349e-07 au q .7841612055380167 2.7234e-06 au i 9.169283869658974 7.652e-05 deg node 36.10919645775216 0.00031423 deg peri 337.8580424566273 0.00030724 deg M 14.33936241459959 1.0935e-05 deg tp 2456850.137219423717 (2014-Jul-11.63721942) 8.2091e-05 TDB period 3297.957024875322 9.03 0.00095091 2.603e-06 d yr n .1091584872952096 3.1474e-08 deg/d Q 7.888007259096272 1.5163e-06 au   Orbit Determination Parameters    # obs. used (total)      44      data-arc span      13080 days (35.81 yr)      first obs. used      1978-10-10      last obs. used      2014-08-02      planetary ephem.      DE431      SB-pert. ephem.      SB431-BIG16      condition code      1      norm. resid. RMS      1.0399      source      ORB      producer      Ryan S. Park      solution date      2014-Nov-10 13:40:54   Additional Information  Earth MOID = .0852532 au   Jupiter MOID = .162384 au   T_jup = 2.234  [ 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 18.3   1. 21 2 parameter fit from 18 observations, autocmod 2.6 comet total magnitude slope K1 33.   n/a 21 autocmod 2.6 comet nuclear magnitude M2 21.4   0.9 21 from 3 observations, autocmod 2.6 comet nuclear magnitude slope K2 5.   n/a 21 autocmod 2.6 comet nuclear phase coefficient PC 0.03   n/a 21 autocmod 2.6 72P/Denning-Fujikawa          Discovered 1881-Oct-04 by Denning, William F. Reference: comet.dis Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  Perihelion  Year (est.)  New-Style  Desig Roman  Numeral  Year/  Letter   1978.4   72P/1978 T2   1978 XIX   1978n   1879.1   72P/1881 T1   1881 V   1881f  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Mar-05 11:39 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin