+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   504033 (2005 UN157) Classification: Apollo [NEO]          SPK-ID: 2504033 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 21 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .8559737216020404 3.8412e-07   a 2.516833044653903 6.0408e-08 au q .3624900967705072 9.6718e-07 au i 44.47010191818287 0.00012735 deg node 21.64971945767413 1.7479e-05 deg peri 210.0227589711868 7.0689e-05 deg M 322.9218250523752 8.2151e-05 deg tp 2459350.708976329297 (2021-May-16.20897633) 0.00033475 TDB period 1458.411358027501 3.99 5.2506e-05 1.438e-07 d yr n .2468439360530621 8.887e-09 deg/d Q 4.671175992537298 1.1212e-07 au   Orbit Determination Parameters    # obs. used (total)      80      data-arc span      4373 days (11.97 yr)      first obs. used      2005-10-29      last obs. used      2017-10-19      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      1      norm. resid. RMS      .65374      source      ORB      producer      Otto Matic      solution date      2021-Apr-14 18:18:13   Additional Information  Earth MOID = .419088 au   Jupiter MOID = 1.36685 au   T_jup = 2.581  [ hide covariance matrix ] Orbital Elements at Epoch 2456504.5 (2013-Jul-31.0) TDB Reference: JPL 21 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .8557605807395702 3.8466e-07   q .3630795181999708 9.685e-07 au tp 2456434.384880690544 (2013-May-21.88488069) 0.00031037 TDB node 21.6817504497922 1.749e-05 deg peri 209.9912850697881 7.0649e-05 deg i 44.49705169343019 0.00012737 deg   Orbit Determination Parameters    # obs. used (total)      80      data-arc span      4373 days (11.97 yr)      first obs. used      2005-10-29      last obs. used      2017-10-19      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      1      norm. resid. RMS      .65374      source      ORB      producer      Otto Matic      solution date      2021-Apr-14 18:18:13   Additional Information  Jupiter MOID = 1.36685 au   T_jup = 2.581  Orbit Covariance (6×6)   e q tp node peri i e 1.479637808696185E-13 -3.725283581090941E-13 2.150760161140189E-11 -3.527318335185283E-13 -1.912283929718204E-11 2.182845404485694E-12 q -3.725283581090941E-13 9.379912594633417E-13 -5.387840683086772E-11 8.713927557430247E-13 4.820893490438906E-11 -5.439319147474506E-12 tp 2.150760161140189E-11 -5.387840683086772E-11 9.632733093059015E-8 2.911192264148969E-10 1.17476627266973E-8 -9.447826995603974E-9 node -3.527318335185283E-13 8.713927557430247E-13 2.911192264148969E-10 3.058855087496216E-10 -1.261947991033521E-10 -1.406831478876463E-9 peri -1.912283929718204E-11 4.820893490438906E-11 1.17476627266973E-8 -1.261947991033521E-10 4.991296199035952E-9 -7.347184708611769E-10 i 2.182845404485694E-12 -5.439319147474506E-12 -9.447826995603974E-9 -1.406831478876463E-9 -7.347184708611769E-10 1.622304784547529E-8 [ 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 18.3   n/a MPO428210   504033 (2005 UN157)          Discovered 2005-Oct-29 by Mt. Lemmon Survey at Mount Lemmon Reference: Last Updated: 2017-11-07 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jun-23 16:37 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin