+ 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 20 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .85597370893876 3.8512e-07   a 2.516833057444134 6.1684e-08 au q .3624901304839994 9.6976e-07 au i 44.47011270100649 0.00012762 deg node 21.64972272951725 1.7672e-05 deg peri 210.0227419681698 7.1885e-05 deg M 322.921840944899 8.4548e-05 deg tp 2459350.708913091430 (2021-May-16.20891309) 0.00034449 TDB period 1458.411369144698 3.99 5.3616e-05 1.468e-07 d yr n .2468439341714171 9.0748e-09 deg/d Q 4.671175984404268 1.1448e-07 au   Orbit Determination Parameters    # obs. used (total)      81      data-arc span      4373 days (11.97 yr)      first obs. used      2005-10-29      last obs. used      2017-10-19      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      1      norm. resid. RMS      .65557      source      ORB      producer      Otto Matic      solution date      2017-Nov-11 06:21:27   Additional Information  Earth MOID = .419089 au   Jupiter MOID = 1.36685 au   T_jup = 2.581  [ hide covariance matrix ] Orbital Elements at Epoch 2456535.5 (2013-Aug-31.0) TDB Reference: JPL 20 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .8557566580502267 3.8567e-07   q .3630815066984052 9.7109e-07 au tp 2456434.384329413812 (2013-May-21.88432941) 0.00031974 TDB node 21.6817757256943 1.7682e-05 deg peri 209.9911273233058 7.1845e-05 deg i 44.49700506058763 0.00012764 deg   Orbit Determination Parameters    # obs. used (total)      81      data-arc span      4373 days (11.97 yr)      first obs. used      2005-10-29      last obs. used      2017-10-19      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      1      norm. resid. RMS      .65557      source      ORB      producer      Otto Matic      solution date      2017-Nov-11 06:21:27   Additional Information  Jupiter MOID = 1.36685 au   T_jup = 2.581  Orbit Covariance (6×6)   e q tp node peri i e 1.487402977403524E-13 -3.745040406804907E-13 2.14339310770493E-11 -3.52177025325188E-13 -1.921816567970801E-11 2.122939749758793E-12 q -3.745040406804907E-13 9.430207107649753E-13 -5.367802029990116E-11 8.703418511098031E-13 4.845526087757019E-11 -5.287124593042088E-12 tp 2.14339310770493E-11 -5.367802029990116E-11 1.022367450700636E-7 3.200764469757636E-10 1.270469942479675E-8 -8.953824128330741E-9 node -3.52177025325188E-13 8.703418511098031E-13 3.200764469757636E-10 3.126583007089401E-10 -1.265990120793102E-10 -1.403541381352805E-9 peri -1.921816567970801E-11 4.845526087757019E-11 1.270469942479675E-8 -1.265990120793102E-10 5.161646490376601E-9 -6.491215176289496E-10 i 2.122939749758793E-12 -5.287124593042088E-12 -8.953824128330741E-9 -1.403541381352805E-9 -6.491215176289496E-10 1.629092275135516E-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-Mar-03 22:41 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin