+ 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 2454972.5 (2009-May-21.0) TDB Reference: JPL 28 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .997512330328695 4.2642e-06   a 512.1897873070631 0.87816 au q 1.27415899983593 1.0903e-06 au i 85.76480576086456 3.9619e-05 deg node 278.6790016737545 4.631e-05 deg peri 129.7722945374815 0.00012646 deg M .001153513663202778 2.9757e-06 deg tp 2454958.933586777743 (2009-May-07.43358678) 0.00013264 TDB period 4233940.97166751 11591.90 10889 29.81 d yr n 8.502716556726493E-5 2.1867e-07 deg/d Q 1023.10541561429 1.7541 au   Orbit Determination Parameters    # obs. used (total)      489      data-arc span      330 days      first obs. used      2009-04-06      last obs. used      2010-03-02      planetary ephem.      DE431      SB-pert. ephem.      SB431-BIG16      norm. resid. RMS      .70638      source      ORB      producer      Otto Matic      solution date      2014-Jun-13 19:44:19   Additional Information  Earth MOID = .504959 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. 28 2 parameter fit from 80 observations, autocmod 2.5c comet total magnitude slope K1 13.   n/a 28 autocmod 2.5c comet nuclear magnitude M2 13.2   1. 28 from 320 observations, autocmod 2.5c comet nuclear magnitude slope K2 5.   n/a 28 autocmod 2.5c comet nuclear phase coefficient PC 0.03   n/a 28 autocmod 2.5c [ 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 < 00:01 Jupiter 0.796920588987494 0.796843524400535 0.796997654773761 22.141854634108 22.0937997596393 2454520.499972603 0.800363830262675 4145.94406813076 486.887976108353 22.2399205609785 91628.595597925 T 28 CATAB v2.0e-lin.ifort 2017-Nov-30 19:07:23 2017-Nov-30 19:07 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-Feb-28 09:54 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin