+ 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 [ 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 1912-Oct-06 03:36 00:05 Mercury 0.00660154474076364 0.00652147044062137 0.00668191991809497 45.9407191510979 45.9402335441915 2419681.650185435 4.9126909469104 4576.73136582461 105.650706897001 29.0684908140385 4522.28700523788 T 21 CATAB v2.0g-lin.ifort 2021-Apr-14 18:18:14 2021-Apr-14 18:18 2037-Apr-09 04:17 00:02 Mercury 0.0812391168725282 0.0812053776077509 0.0812728575963617 54.2747983914207 54.2747649901768 2465157.678777422 1.69271391182519 1768.39416543644 129.03311119964 -17.9829703184896 29755.1629699576 T 21 CATAB v2.0g-lin.ifort 2021-Apr-14 18:18:14 2021-Apr-14 18:18 2064-Dec-19 08:19 00:03 Mercury 0.0735772922174789 0.0735237087618401 0.0736308887065498 54.5415721823441 54.5415354833118 2475273.846397525 3.14223504926901 3087.27012966664 126.933663280845 -30.0777323591822 43503.4156402895 T 21 CATAB v2.0g-lin.ifort 2021-Apr-14 18:18:14 2021-Apr-14 18:18 2076-Oct-11 23:47 00:05 Mercury 0.0645785642537134 0.0645242570254375 0.0646329082403749 46.7836242741326 46.7835755275811 2479588.491281072 5.13449149080448 3641.14445611401 143.115861889343 41.9668045061419 45151.130464412 T 21 CATAB v2.0g-lin.ifort 2021-Apr-14 18:18:14 2021-Apr-14 18:18 2084-Oct-05 23:29 00:04 Earth 0.467887606326634 0.467852653791296 0.467922561726398 43.8684338904531 43.8683040771121 2482504.478246038 3.50226852064607 2530.94754548988 177.63221181426 46.6237689819033 283498.736085403 T 21 CATAB v2.0g-lin.ifort 2021-Apr-14 18:18:14 2021-Apr-14 18:18 2088-Sep-17 15:23 00:03 Earth 0.37910188262733 0.379079112714089 0.379124660329317 31.1277688696612 31.1275430769088 2483947.140835175 3.03158626428315 2970.80555888131 182.054502156029 -67.7878620302275 291826.071470607 T 21 CATAB v2.0g-lin.ifort 2021-Apr-14 18:18:14 2021-Apr-14 18:18 2127-Sep-23 06:00 00:06 Earth 0.329285152094603 0.329264335698328 0.329305999376214 33.5054661970612 33.5052246920712 2498195.750134604 5.6876668314234 5203.15727343889 171.014769168688 -78.6364245155956 284937.23084183 T 21 CATAB v2.0g-lin.ifort 2021-Apr-14 18:18:14 2021-Apr-14 18:18 2158-Sep-29 10:14 00:08 Earth 0.320468890607507 0.320435795502605 0.320502032499626 37.7100373754211 37.7098168946157 2509524.926169209 7.70560585388334 6354.21110293211 162.490869382224 75.0055894016331 284969.484288321 T 21 CATAB v2.0g-lin.ifort 2021-Apr-14 18:18:14 2021-Apr-14 18:18 2189-Oct-03 06:37 00:08 Earth 0.352554122736807 0.352490152845746 0.352618125313289 40.4367348958956 40.4365479949572 2520851.775370933 7.99846328843922 6237.33260214398 156.620598428291 59.2631055324451 287997.427885796 T 21 CATAB v2.0g-lin.ifort 2021-Apr-14 18:18:14 2021-Apr-14 18:18 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-22 00:52 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin