+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   181708 (1993 FW) Classification: TransNeptunian Object          SPK-ID: 2181708 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 5 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .05061891516837467 2.0503e-05   a 43.81973468767359 0.0013225 au q 41.60162725481755 0.00036842 au i 7.754903636331218 5.3682e-05 deg node 187.9531158846123 0.00024813 deg peri 46.65028393793978 0.011491 deg M 351.4343047045194 0.010682 deg tp 2461721.443794694094 (2027-Nov-11.94379469) 3.0413 TDB period 105950.507785247 290.08 4.7964 0.01313 d yr n .003397812880044807 1.5382e-07 deg/d Q 46.03784212052962 0.0013894 au   Orbit Determination Parameters    # obs. used (total)      172      data-arc span      9936 days (27.20 yr)      first obs. used      1993-03-28      last obs. used      2020-06-10      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      2      norm. resid. RMS      .7183      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 21:31:42   Additional Information  Earth MOID = 40.5943 au   Jupiter MOID = 36.2133 au   T_jup = 5.862  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 6.89   n/a E2021B55   181708 (1993 FW)          Discovered 1993-Mar-28 by Jewitt, D. C., Luu, J. X. at Mauna Kea Reference: 20080420/Numbers.arc Last Updated: 2008-04-23 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2021-Apr-23 10:07 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin