+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   C/2009 F6 (Yi-SWAN) Classification: Comet          SPK-ID: 1003019 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2454973.5 (2009-May-22.0) TDB Reference: JPL 29 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .9975143424739534 4.422e-06   a 512.6044057937434 0.91213 au q 1.274158999145848 1.1385e-06 au i 85.7647855400708 4.1384e-05 deg node 278.6790256429147 4.7651e-05 deg peri 129.7723269890618 0.00013108 deg M .001237036211202921 3.3113e-06 deg tp 2454958.933613114178 (2009-May-07.43361311) 0.00013779 TDB period 4239083.085366305 11605.98 11315 30.98 d yr n 8.492402549097287E-5 2.2667e-07 deg/d Q 1023.934652588341 1.822 au   Orbit Determination Parameters    # obs. used (total)      487      data-arc span      330 days      first obs. used      2009-04-06      last obs. used      2010-03-02      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      norm. resid. RMS      .65944      source      ORB      producer      Otto Matic      solution date      2021-Apr-15 23:31:30   Additional Information  Earth MOID = .504727 au   Jupiter MOID = .723915 au   T_jup = 0.113  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes comet total magnitude M1 9.7   1. 29 2 parameter fit from 80 observations, autocmod 2.9c comet total magnitude slope K1 13.   n/a 29 autocmod 2.9c comet nuclear magnitude M2 13.2   1. 29 from 320 observations, autocmod 2.9c comet nuclear magnitude slope K2 5.   n/a 29 autocmod 2.9c comet nuclear phase coefficient PC 0.03   n/a 29 autocmod 2.9c [ hide close-approach data ] Close-Approach Data   ...sorted by Date/Time (TDB) Date/Time (TDB) Time Uncertainty (days_HH:MM) Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified 2008-Feb-24 00:00 00:03 Jupiter 0.796929510623083 0.796849470201198 0.797009552329546 22.1418713781857 22.0938170789613 2454520.500232792 2.51364800621033 4303.74270675837 497.421779228577 22.1582663125448 89361.1379739497 T 29 CATAB v2.0g-lin.ifort 2021-Apr-15 23:31:33 2021-Apr-15 23:31 Alternate Designations  Perihelion  Year (est.)  New-Style  Desig Roman  Numeral  Year/  Letter   2009.3   C/2009 F6        [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ] 2021-Apr-16 15:25 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin