+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   259P/Garradd Classification: Encke-type Comet          SPK-ID: 1002991 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2455618.5 (2011-Feb-26.0) TDB Reference: JPL 13 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .3415297612571303 7.028e-07   a 2.727440932037478 6.8387e-08 au q 1.795938681675793 1.9484e-06 au i 15.89853595203317 2.5762e-05 deg node 51.96969233798974 0.000188 deg peri 256.5908921731303 0.0002245 deg M 206.9966005001279 6.65e-05 deg tp 2456317.746074890684 (2013-Jan-25.24607489) 0.00029026 TDB period 1645.248326399811 4.50 6.1879e-05 1.694e-07 d yr n .2188119533224291 8.2296e-09 deg/d Q 3.658943182399162 9.1743e-08 au   Orbit Determination Parameters    # obs. used (total)      68      data-arc span      3306 days (9.05 yr)      first obs. used      2008-09-02      last obs. used      2017-09-21      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .78106      source      ORB      producer      Otto Matic      solution date      2017-Oct-03 10:47:43   Additional Information  Earth MOID = .857638 au   Jupiter MOID = 1.9249 au   T_jup = 3.217  [ 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 13.7   1. 13 2 parameter fit from 57 observations, autocmod 2.6i comet total magnitude slope K1 22.   n/a 13 autocmod 2.6i comet nuclear magnitude M2 18.9   01. 13 from 9 observations, autocmod 2.6i comet nuclear magnitude slope K2 5.   n/a 13 autocmod 2.6i comet nuclear phase coefficient PC 0.03   n/a 13 autocmod 2.6i [ show close-approach data ] Alternate Designations  Perihelion  Year (est.)  New-Style  Desig Roman  Numeral  Year/  Letter   2008.6   259P/2008 R1        [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] 2021-Mar-05 10:39 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin