+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   447238 (2005 US191) Classification: Main-belt Asteroid          SPK-ID: 2447238 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 10 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1183019728868272 8.757e-08   a 3.105265442855722 5.2165e-08 au q 2.737906414628603 2.6119e-07 au i 6.072441365411828 9.8496e-06 deg node 42.15458580190042 7.4677e-05 deg peri 26.26022935558915 8.5791e-05 deg M 230.7430528011622 3.9748e-05 deg tp 2459718.125588449367 (2022-May-18.62558845) 0.00022644 TDB period 1998.694982671654 5.47 5.0363e-05 1.379e-07 d yr n .1801175282477511 4.5386e-09 deg/d Q 3.472624471082842 5.8336e-08 au   Orbit Determination Parameters    # obs. used (total)      116      data-arc span      4934 days (13.51 yr)      first obs. used      2005-10-27      last obs. used      2019-05-01      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .63111      source      ORB      producer      Otto Matic      solution date      2020-Feb-26 11:08:34   Additional Information  Earth MOID = 1.75339 au   Jupiter MOID = 1.84005 au   T_jup = 3.201  [ hide covariance matrix ] Orbital Elements at Epoch 2457243.5 (2015-Aug-09.0) TDB Reference: JPL 10 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1227907538476702 8.9288e-08   q 2.716706540656147 2.6986e-07 au tp 2457715.828832342970 (2016-Nov-23.32883234) 0.0001975 TDB node 42.39127312349965 7.415e-05 deg peri 24.82126682413798 8.413e-05 deg i 6.101946977367483 9.8894e-06 deg   Orbit Determination Parameters    # obs. used (total)      116      data-arc span      4934 days (13.51 yr)      first obs. used      2005-10-27      last obs. used      2019-05-01      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .63111      source      ORB      producer      Otto Matic      solution date      2020-Feb-26 11:08:34   Additional Information  Jupiter MOID = 1.84005 au   T_jup = 3.201  Orbit Covariance (6×6)   e q tp node peri i e 7.972268730955759E-15 -2.380228772344467E-14 -1.307007386093918E-12 1.070484030501019E-13 -4.337073353977937E-13 -8.452267553317253E-15 q -2.380228772344467E-14 7.282231801981223E-14 5.747693174459299E-12 -3.270686078840343E-13 1.564950255397726E-12 2.607775819042453E-14 tp -1.307007386093918E-12 5.747693174459299E-12 3.900675269688209E-8 -3.769237405418525E-11 7.892241110921336E-9 7.075739050367095E-12 node 1.070484030501019E-13 -3.270686078840343E-13 -3.769237405418525E-11 5.498288711391247E-9 -5.474475427506346E-9 9.320222995637343E-11 peri -4.337073353977937E-13 1.564950255397726E-12 7.892241110921336E-9 -5.474475427506346E-9 7.077861979981155E-9 -9.143770028835517E-11 i -8.452267553317253E-15 2.607775819042453E-14 7.075739050367095E-12 9.320222995637343E-11 -9.143770028835517E-11 9.780004074460264E-11 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 16.8   n/a MPO437739   447238 (2005 US191)          Discovered 2005-Oct-27 by Mt. Lemmon Survey at Mount Lemmon Reference: Last Updated: 2015-10-28 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Jul-14 23:47 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin