+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   30785 Greeley (1988 PX) Classification: Mars-crossing Asteroid          SPK-ID: 2030785 [ 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 14 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .3441304552941655 5.1573e-08   a 2.200769138014536 1.1607e-08 au q 1.443417452552245 1.1465e-07 au i 5.401836736830243 7.1241e-06 deg node 13.38797547028755 5.319e-05 deg peri 308.9694028782926 5.4275e-05 deg M 265.7995114197066 1.5952e-05 deg tp 2459312.540390127484 (2021-Apr-08.04039013) 5.4785e-05 TDB period 1192.504859994904 3.26 9.4338e-06 2.583e-08 d yr n .3018855621280558 2.3882e-09 deg/d Q 2.958120823476826 1.5601e-08 au   Orbit Determination Parameters    # obs. used (total)      303      data-arc span      11599 days (31.76 yr)      first obs. used      1988-08-13      last obs. used      2020-05-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .58729      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 01:04:32   Additional Information  Earth MOID = .440132 au   Jupiter MOID = 2.40145 au   T_jup = 3.580  [ hide covariance matrix ] Orbital Elements at Epoch 2457381.5 (2015-Dec-25.0) TDB Reference: JPL 14 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .3448383406514145 5.1694e-08   q 1.441791220645954 1.1493e-07 au tp 2456926.367086216627 (2014-Sep-25.86708622) 4.1081e-05 TDB node 13.4176902034217 5.3218e-05 deg peri 308.8592171635306 5.4293e-05 deg i 5.402441550058546 7.1228e-06 deg   Orbit Determination Parameters    # obs. used (total)      303      data-arc span      11599 days (31.76 yr)      first obs. used      1988-08-13      last obs. used      2020-05-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .58729      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 01:04:32   Additional Information  Jupiter MOID = 2.40145 au   T_jup = 3.580  Orbit Covariance (6×6)   e q tp node peri i e 2.67225818960221E-15 -5.928437390265541E-15 1.876334369610293E-13 -6.444355332212365E-15 1.051855815697708E-13 3.57064814306017E-15 q -5.928437390265541E-15 1.320925984498157E-14 -2.249794839264295E-13 1.089582602994356E-14 -1.825626266828166E-13 -7.850644495724065E-15 tp 1.876334369610293E-13 -2.249794839264295E-13 1.687634087025137E-9 -2.586955493305293E-11 4.582727219159421E-10 1.141043467015633E-12 node -6.444355332212365E-15 1.089582602994356E-14 -2.586955493305293E-11 2.832185610769222E-9 -2.825119205963674E-9 -7.456598684431071E-11 peri 1.051855815697708E-13 -1.825626266828166E-13 4.582727219159421E-10 -2.825119205963674E-9 2.947675898044575E-9 7.456126195173501E-11 i 3.57064814306017E-15 -7.850644495724065E-15 1.141043467015633E-12 -7.456598684431071E-11 7.456126195173501E-11 5.073399762412854E-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 16.5   n/a MPO468102   30785 Greeley           Discovered 1988 Aug. 13 by C. S. Shoemaker and E. M. Shoemaker at Palomar. Ronald Greeley (b. 1939) has been involved in lunar and planetary studies since 1967. His current research focuses on understanding planetary surface processes and geological histories and involves a combination of spacecraft data analysis, laboratory experiments and geological field studies on the earth. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20030501/MPCPages.arc Last Updated: 2003-10-02 [ 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 1939-Aug-13 23:37 < 00:01 Earth 0.437933859884818 0.437933493270455 0.437934226506475 1.79716307586338 1.79377443159391 2429489.484172549 0.909965492077951 316.572668484976 17.5652514032576 88.8699530686493 452945.493026775 T 14 CATAB v2.0f-lin.ifort 2020-Nov-13 01:04:33 2020-Nov-13 01:04 1988-Aug-18 20:46 < 00:01 Earth 0.443468213992196 0.44346777383699 0.443468654154435 2.03913851401109 2.03618990463214 2447392.365309208 0.296126034027059 124.72931966343 15.1414177155598 -82.7636373982879 533280.82360074 T 14 CATAB v2.0f-lin.ifort 2020-Nov-13 01:04:33 2020-Nov-13 01:04 2001-Jul-26 01:28 < 00:01 Earth 0.489652089627477 0.489651607896455 0.489652571358667 1.4275002540036 1.42368318879001 2452116.561020843 0.151984674351722 65.3738689261531 22.9873517974893 -84.2983136247831 657162.877089066 T 14 CATAB v2.0f-lin.ifort 2020-Nov-13 01:04:33 2020-Nov-13 01:04 2037-Aug-26 10:25 < 00:01 Earth 0.453547941408723 0.453547120638008 0.453548762200424 2.3242212835847 2.32169228826281 2465296.933741446 0.374056608495811 171.694078774016 15.6608743195979 -77.3081802383978 612163.743614104 T 14 CATAB v2.0f-lin.ifort 2020-Nov-13 01:04:33 2020-Nov-13 01:04 2050-Aug-01 05:43 < 00:01 Earth 0.467262795623201 0.467261183185365 0.467264408063614 1.4597385713185 1.45582693611747 2470019.738094627 0.575873378311068 108.344728085794 52.6616231489391 -49.6905184531515 573344.09074158 T 14 CATAB v2.0f-lin.ifort 2020-Nov-13 01:04:33 2020-Nov-13 01:04 2086-Aug-30 17:16 < 00:01 Earth 0.462307295700685 0.462304936529496 0.46230965500227 2.49621734175708 2.49390740439838 2483198.219600801 0.920273293323639 408.448177484325 16.2368398410101 -73.4848391220717 656655.043249408 T 14 CATAB v2.0f-lin.ifort 2020-Nov-13 01:04:33 2020-Nov-13 01:04 2099-Aug-05 18:40 00:01 Earth 0.456745128205254 0.456742670775211 0.456747585637815 1.58876885191451 1.58509281016344 2487921.277601773 1.09654768222645 137.320778266631 65.4196832829496 29.4913741441536 352993.186489071 T 14 CATAB v2.0f-lin.ifort 2020-Nov-13 01:04:33 2020-Nov-13 01:04 2135-Sep-04 04:22 00:01 Earth 0.473112919297139 0.47310929891765 0.473116539886342 2.6535675099798 2.65144430859316 2501098.681688535 1.24032432659619 530.785736163108 16.9638685130295 -70.2628394783529 705016.948035978 T 14 CATAB v2.0f-lin.ifort 2020-Nov-13 01:04:33 2020-Nov-13 01:04 2148-Aug-09 21:42 00:01 Earth 0.450416698543363 0.450414469507119 0.450418927623031 1.73486975192742 1.73145657796916 2505822.404132683 1.31874305911769 257.868049825401 35.6038942646158 65.2857089374495 416229.707908431 T 14 CATAB v2.0f-lin.ifort 2020-Nov-13 01:04:33 2020-Nov-13 01:04 2184-Sep-05 09:51 00:01 Earth 0.480369698733134 0.480365542146376 0.480373855535581 2.74961200673037 2.74759399012231 2518997.910755543 1.31317020715143 550.089167645835 17.2868692068744 -67.9967342710487 737382.151276071 T 14 CATAB v2.0f-lin.ifort 2020-Nov-13 01:04:33 2020-Nov-13 01:04 2197-Aug-10 05:24 00:01 Earth 0.448751904174711 0.448749458586557 0.44875434980123 1.74237370053119 1.73896263498297 2523719.725241123 1.33665479528233 250.421604977105 39.8732241221248 61.8254978064416 409848.056632997 T 14 CATAB v2.0f-lin.ifort 2020-Nov-13 01:04:33 2020-Nov-13 01:04 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-18 04:16 UT (server date/time)   Site Manager:   Ryan S. 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