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285990 (2001 SK9)
Classification: Apollo [NEO]          SPK-ID: 2285990
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 48 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .7890708672211509 7.3645e-08  
a 1.785429062193525 9.0984e-09 au
q .3765990037266339 1.3145e-07 au
i 25.96530845299349 1.5626e-05 deg
node 195.7569554452769 1.8407e-05 deg
peri 34.55763454738934 1.9306e-05 deg
M 344.0474790034992 1.3335e-05 deg
tp 2459039.113498388513
(2020-Jul-08.61349839)
3.2514e-05 TDB
period 871.3895078347642
2.39
6.6608e-06
1.824e-08
d
yr
n .4131332736545462 3.1579e-09 deg/d
Q 3.194259120660416 1.6278e-08 au
  Orbit Determination Parameters
   # obs. used (total)      163  
   data-arc span      6931 days (18.98 yr)  
   first obs. used      2001-09-17  
   last obs. used      2020-09-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51287  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Sep-15 06:58:24  

Additional Information
 Earth MOID = .219766 au 
 Jupiter MOID = 1.99494 au 
 T_jup = 3.561 
[ show covariance matrix ]

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 17.9   n/a MPO455119  

285990 (2001 SK9)          Discovered 2001-Sep-17 by LINEAR at Socorro
Reference: 20110912/Numbers.arcLast Updated: 2011-09-14

[ 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
1908-Jan-26 06:43 00:01 Earth 0.423247105137876 0.423245611646419 0.423248598877643 29.9244072684487 29.9241968933513 2417966.780034660 1.10525098045661 567.41500740009 31.0740068526319 83.1386029526985 1948123.13177823 T 48 CATAB v2.0f-lin.ifort 2020-Sep-15 06:58:30 2020-Sep-15 06:58
1910-Sep-11 21:32 < 00:01 Earth 0.25180418537636 0.251803053039477 0.251805318044669 28.7549983801008 28.7546303877057 2418926.397537185 0.590288313418808 524.740638957341 27.5224013451395 -84.6005406231902 1361724.13191659 T 48 CATAB v2.0f-lin.ifort 2020-Sep-15 06:58:30 2020-Sep-15 06:58
1920-Jan-20 22:20 < 00:01 Earth 0.439948043111782 0.439945247769485 0.439950838681152 31.8583828462424 31.8581927434329 2422344.430570431 0.95256963791215 530.43294887282 31.6605210894127 75.1443001342897 1946947.01875356 T 48 CATAB v2.0f-lin.ifort 2020-Sep-15 06:58:30 2020-Sep-15 06:58
1922-Sep-08 12:02 < 00:01 Earth 0.260230982434883 0.260228172070857 0.260233793143809 26.1577164276713 26.1573249952651 2423306.001379905 0.526288238069572 501.925558158872 27.7322829772957 74.0897978624792 1368789.69577857 T 48 CATAB v2.0f-lin.ifort 2020-Sep-15 06:58:30 2020-Sep-15 06:58
1932-Jan-12 16:00 < 00:01 Earth 0.491847787685937 0.491843181132715 0.491852394393769 35.5041056524835 35.503953070242 2426719.166350282 0.810676467444348 495.521312458537 31.7927495723197 62.608778375875 2000226.06699423 T 48 CATAB v2.0f-lin.ifort 2020-Sep-15 06:58:30 2020-Sep-15 06:58
1934-Sep-03 18:28 < 00:01 Earth 0.336414831060933 0.336408410751192 0.336421251530561 22.3083138484232 22.3079588111633 2427684.269533586 0.399226941570109 487.099268674921 27.7677340602986 49.013763502077 1439303.81239878 T 48 CATAB v2.0f-lin.ifort 2020-Sep-15 06:58:30 2020-Sep-15 06:58
1944-Jan-30 16:53 00:01 Mercury 0.0378994492014424 0.0378866075578823 0.0379122919041571 37.9442123416178 37.9441099306854 2431120.203175341 1.01844217082981 714.139713964693 18.4924725573288 -26.2785287563158 135806.995407799 T 48 CATAB v2.0f-lin.ifort 2020-Sep-15 06:58:30 2020-Sep-15 06:58
1963-Feb-28 09:59 < 00:01 Earth 0.474562837634758 0.47456072016067 0.474564955208738 27.1724532000988 27.1722465710234 2438088.916144702 0.9985918138105 367.623056186386 23.4407226555182 -73.7021859768778 2515377.15128321 T 48 CATAB v2.0f-lin.ifort 2020-Sep-15 06:58:30 2020-Sep-15 06:58
1965-Sep-25 01:34 < 00:01 Earth 0.385236428682155 0.385231734908499 0.38524112248774 37.4684533845338 37.468268789373 2439028.565614976 0.383123976866342 292.924464009785 27.6576248106432 -37.1548587040204 1244833.99155555 T 48 CATAB v2.0f-lin.ifort 2020-Sep-15 06:58:30 2020-Sep-15 06:58
1975-Jan-28 06:17 < 00:01 Earth 0.415907872458117 0.415907234040032 0.415908510876605 28.9764473679555 28.9762262766141 2442440.761969662 0.539249573808399 272.812710065882 31.743843254161 89.490659622838 1883339.22036333 T 48 CATAB v2.0f-lin.ifort 2020-Sep-15 06:58:30 2020-Sep-15 06:58
1975-Feb-26 15:52 < 00:01 Mercury 0.0742510158264879 0.0742443779419305 0.074257653898051 36.70975652015 36.7097024894505 2442470.160978325 0.619017155996683 379.74446486035 18.7418938583124 -29.3868486873417 291721.650668718 T 48 CATAB v2.0f-lin.ifort 2020-Sep-15 06:58:30 2020-Sep-15 06:58
1977-Jul-18 02:17 < 00:01 Mercury 0.0838505608348626 0.0838434258209925 0.0838576959302374 46.573978973201 46.5739412615943 2443342.595416408 0.363330014314845 378.973258958818 16.2158299552386 20.1611809085755 267824.616708342 T 48 CATAB v2.0f-lin.ifort 2020-Sep-15 06:58:30 2020-Sep-15 06:58
1977-Sep-11 10:07 < 00:01 Earth 0.233156449333068 0.233155762761735 0.233157135931717 27.8419981238916 27.8415876668362 2443397.921284341 0.255330699676455 225.6108520992 28.2642945724514 85.047634538163 1236275.8561641 T 48 CATAB v2.0f-lin.ifort 2020-Sep-15 06:58:30 2020-Sep-15 06:58
1989-Sep-01 07:00 < 00:01 Earth 0.466510971415245 0.466508467351738 0.466513475485038 18.8635309647978 18.8632281821441 2447770.792005714 0.0760384516639611 152.539324679874 27.6881997753069 35.736439591631 1644119.4997566 T 48 CATAB v2.0f-lin.ifort 2020-Sep-15 06:58:30 2020-Sep-15 06:58
2000-Feb-09 04:56 < 00:01 Jupiter 1.99443846516199 1.99443750377872 1.99443942654672 7.37716537392743 7.31937049874114 2451583.705268802 0.270147495163433 120.55132255849 31.2387317671191 -71.8530627117497 6627821.9170619 T 48 CATAB v2.0f-lin.ifort 2020-Sep-15 06:58:30 2020-Sep-15 06:58
2003-Oct-20 02:17 < 00:01 Mercury 0.0442330415225699 0.0442309919997673 0.0442350910835706 43.3629780048569 43.3629012229922 2452932.595330990 0.121710462154296 121.420921241345 15.2923190097653 32.9733580848754 239504.661115939 T 48 CATAB v2.0f-lin.ifort 2020-Sep-15 06:58:30 2020-Sep-15 06:58
2006-Feb-14 10:50 < 00:01 Earth 0.439740796817242 0.439739959615074 0.439741634023685 26.0600985544684 26.0598660445513 2453780.951138166 0.208198025990343 97.4375983139314 26.3003789746828 -69.7834248224131 2092823.72929111 T 48 CATAB v2.0f-lin.ifort 2020-Sep-15 06:58:30 2020-Sep-15 06:58
2008-Sep-17 19:35 < 00:01 Earth 0.257402774433245 0.257402156901556 0.257403391965124 32.2980138941043 32.2976933959957 2454727.315657788 0.0679080582544927 42.1037071860064 28.4557684618947 -67.7114409508372 1289362.56969875 T 48 CATAB v2.0f-lin.ifort 2020-Sep-15 06:58:30 2020-Sep-15 06:58
2012-Jan-10 19:40 < 00:01 Jupiter 1.98391876358269 1.98391783506693 1.98391969210013 7.43555844097709 7.37791576419233 2455937.319772840 0.25719140981959 113.364062729768 22.0165589788847 -68.667876030856 5730388.21604149 T 48 CATAB v2.0f-lin.ifort 2020-Sep-15 06:58:30 2020-Sep-15 06:58
2018-Jan-14 01:58 < 00:01 Earth 0.459182892806963 0.459181873046816 0.459183912570348 34.376791773407 34.376622977318 2458132.582168333 0.119886988902847 95.9116438979747 33.8267179867888 64.9725897536541 1818943.26390404 T 48 CATAB v2.0f-lin.ifort 2020-Sep-15 06:58:30 2020-Sep-15 06:58
2020-Sep-03 06:26 < 00:01 Earth 0.359379972728538 0.359378614180655 0.359381331278014 21.3472873025385 21.346939990911 2459095.767775706 0.073111072494687 79.3920933500351 27.6601548433416 33.7970615516465 1294883.72751486 T 48 CATAB v2.0f-lin.ifort 2020-Sep-15 06:58:30 2020-Sep-15 06:58
2023-Dec-13 02:06 < 00:01 Jupiter 1.98946903311064 1.98946812648548 1.9894699397375 7.52034581569559 7.46351760770556 2460291.587217075 0.294278221298424 108.005426484594 15.2946486740297 -66.7944657931849 4677083.00700912 T 48 CATAB v2.0f-lin.ifort 2020-Sep-15 06:58:30 2020-Sep-15 06:58
2030-Jan-18 10:52 < 00:01 Mercury 0.0728024425939957 0.0727981355570331 0.0728067496769227 45.9353696350254 45.9353255966573 2462519.952468509 0.224204110301721 233.443373978227 16.024062042936 23.1267975949635 269805.886564811 T 48 CATAB v2.0f-lin.ifort 2020-Sep-15 06:58:30 2020-Sep-15 06:58
2037-Mar-01 13:24 < 00:01 Earth 0.481113741784347 0.481112387034517 0.481115096563111 27.0656934014398 27.0654887819116 2465119.058659784 0.552886461035112 210.348353631866 24.1525792199599 -72.4263757712827 2439482.97922159 T 48 CATAB v2.0f-lin.ifort 2020-Sep-15 06:58:30 2020-Sep-15 06:58
2039-Sep-24 20:33 < 00:01 Earth 0.340963400972696 0.340960488779528 0.340966313183306 36.5017948077015 36.5015807200359 2466056.356114790 0.237544458536676 190.90005353252 27.9229622983068 -41.0070471909857 1195487.09225306 T 48 CATAB v2.0f-lin.ifort 2020-Sep-15 06:58:30 2020-Sep-15 06:58
2049-Jan-25 06:39 < 00:01 Earth 0.403556181194171 0.403555296846845 0.403557065575815 29.5923983798359 29.5921752642931 2469466.776981213 0.521258552773716 288.083304227551 33.4424068099027 84.2342898383462 1739902.30266642 T 48 CATAB v2.0f-lin.ifort 2020-Sep-15 06:58:30 2020-Sep-15 06:58
2051-Sep-09 23:49 < 00:01 Earth 0.231331487395907 0.231328959122887 0.231334015776847 26.0430799571552 26.0426376856598 2470424.492499088 0.286861212491984 285.134358995908 28.4378340142053 64.3456967571056 1117681.14583639 T 48 CATAB v2.0f-lin.ifort 2020-Sep-15 06:58:30 2020-Sep-15 06:58
2056-Apr-24 05:10 < 00:01 Mercury 0.0334802742222677 0.0334722487618691 0.0334883008280004 38.6852892401211 38.6851755323994 2472112.715220113 0.698791940065906 505.684928639129 17.5810148837245 -37.7052473695648 174255.604662058 T 48 CATAB v2.0f-lin.ifort 2020-Sep-15 06:58:30 2020-Sep-15 06:58
2063-Sep-01 17:55 < 00:01 Earth 0.476884158780797 0.47687753820188 0.476890779391132 18.4387159357733 18.4384129150326 2474799.246419105 0.0694294546667178 382.774119940977 27.6268844732954 30.4881893188374 1435866.46310055 T 48 CATAB v2.0f-lin.ifort 2020-Sep-15 06:58:30 2020-Sep-15 06:58
2080-Mar-04 04:55 00:01 Earth 0.485226729243709 0.485223577091116 0.485229881575915 27.1941702203253 27.1939682937679 2480827.704890006 1.38869636663834 496.456455070292 23.7024157650477 -71.7384342046602 2488655.77829224 T 48 CATAB v2.0f-lin.ifort 2020-Sep-15 06:58:30 2020-Sep-15 06:58
2082-Sep-27 02:52 < 00:01 Earth 0.379228955587635 0.379221349279666 0.379236561962235 38.1167781665642 38.1165938366876 2481764.619789158 0.581013747071819 455.022999423408 28.1378242967223 -33.6050092405792 1099939.23532945 T 48 CATAB v2.0f-lin.ifort 2020-Sep-15 06:58:30 2020-Sep-15 06:58
2089-Oct-15 08:34 00:01 Mercury 0.0235148965582659 0.0235030583403027 0.0235267400964368 38.9421728439582 38.9420120159 2484339.856685640 1.08322718740007 812.398503549799 17.2341454575732 -43.3928016343311 140103.421558126 T 48 CATAB v2.0f-lin.ifort 2020-Sep-15 06:58:30 2020-Sep-15 06:58
2092-Feb-11 11:20 00:01 Earth 0.415518194487303 0.415515321241201 0.415521068047897 25.7753222327051 25.7750734499322 2485188.972494611 1.44804598616411 600.24315409314 29.9275779095259 -76.4826517614609 1860154.90323094 T 48 CATAB v2.0f-lin.ifort 2020-Sep-15 06:58:30 2020-Sep-15 06:58
2094-Sep-19 01:48 < 00:01 Earth 0.243805467596151 0.243799669203868 0.243811266291594 32.5984521109901 32.5981168568341 2486139.575100240 0.616680961466536 518.851134629013 28.5412976692814 -56.2614683930859 1051711.11012899 T 48 CATAB v2.0f-lin.ifort 2020-Sep-15 06:58:30 2020-Sep-15 06:58
2104-Jan-31 17:22 00:01 Earth 0.390384971671817 0.390384255633564 0.390385687762241 28.1022798288607 28.1020369556642 2489560.223603773 1.16135788619136 590.044488573622 32.9976294170531 -88.6726440811933 1706359.2692098 T 48 CATAB v2.0f-lin.ifort 2020-Sep-15 06:58:30 2020-Sep-15 06:58
2106-Sep-15 01:43 < 00:01 Earth 0.19981516460464 0.19981409962582 0.199816230008904 29.0960308551625 29.0955725512304 2490517.571661235 0.613550900312316 548.961734714999 28.6980652560919 -85.3236956417406 1037879.22457534 T 48 CATAB v2.0f-lin.ifort 2020-Sep-15 06:58:30 2020-Sep-15 06:58
2116-Jan-25 18:33 00:01 Earth 0.393636010997429 0.393633938229104 0.393638084101791 30.2060629884656 30.2058388971522 2493937.272861963 1.08989586756239 615.06887962664 33.5469561951774 80.8397488803748 1684100.52179715 T 48 CATAB v2.0f-lin.ifort 2020-Sep-15 06:58:30 2020-Sep-15 06:58
2118-Sep-12 06:58 < 00:01 Earth 0.204150274638316 0.20414713135782 0.204153418544891 27.125912505947 27.1254313544035 2494897.790334346 0.63295073205879 594.522228864004 28.7376952033054 74.9588293520352 1036271.69474596 T 48 CATAB v2.0f-lin.ifort 2020-Sep-15 06:58:30 2020-Sep-15 06:58
2128-Jan-23 10:48 00:01 Earth 0.399352956296699 0.399349651774704 0.399356261230868 31.2098632395427 31.2096494605262 2498317.949753351 1.15428358319249 673.915126381519 33.5375396533774 76.1307869536499 1683076.96068985 T 48 CATAB v2.0f-lin.ifort 2020-Sep-15 06:58:30 2020-Sep-15 06:58
2130-Sep-11 05:35 < 00:01 Earth 0.21121603517714 0.211211007175344 0.211221063885107 26.3827430384397 26.3822648826061 2499279.732304002 0.692293673246095 662.347551185115 28.7365107269889 67.8869006713604 1033407.98035519 T 48 CATAB v2.0f-lin.ifort 2020-Sep-15 06:58:30 2020-Sep-15 06:58
2140-Jan-22 19:25 00:01 Earth 0.400925435196474 0.40092143330041 0.400929437590453 31.5108210480806 31.5106101413296 2502700.308964190 1.25834686841133 742.035881957652 33.4730616077835 74.6089219509155 1681651.39200929 T 48 CATAB v2.0f-lin.ifort 2020-Sep-15 06:58:30 2020-Sep-15 06:58
2142-Jul-17 08:41 00:02 Mercury 0.05275676289193 0.0527365666197738 0.0527769607038224 36.6773962026658 36.6773200915676 2503606.861928427 1.71306804947988 1102.9032094155 17.8264326805639 -24.0552825659415 180469.257854779 T 48 CATAB v2.0f-lin.ifort 2020-Sep-15 06:58:30 2020-Sep-15 06:58
2142-Sep-11 02:59 < 00:01 Earth 0.21100390973624 0.210998183349609 0.211009636967525 26.2683239696202 26.2678432482108 2503662.624565342 0.763314041431718 727.508109700197 28.7326814916575 66.9921985698229 1026484.65150925 T 48 CATAB v2.0f-lin.ifort 2020-Sep-15 06:58:30 2020-Sep-15 06:58
2144-Dec-09 12:20 00:01 Mercury 0.0252372473210451 0.0252165247061566 0.0252579742402218 41.2009718225464 41.2008301859516 2504483.014098914 1.31342764591435 1156.81774008008 16.5362110411984 26.7038047623656 102418.887728853 T 48 CATAB v2.0f-lin.ifort 2020-Sep-15 06:58:30 2020-Sep-15 06:58
2152-Jan-23 07:06 00:01 Earth 0.397830245145959 0.397826862960541 0.397833627720767 31.3206004084689 31.3203865699375 2507083.795633903 1.11058859615884 655.306875095572 33.4481028192063 75.3687527161287 1675861.75068647 T 48 CATAB v2.0f-lin.ifort 2020-Sep-15 06:58:30 2020-Sep-15 06:58
2154-Sep-11 11:19 < 00:01 Earth 0.206477630130301 0.206473282950587 0.206481977895546 26.5034610183782 26.5029741172868 2508045.971589150 0.624349145094474 594.147057730798 28.7412725336511 68.7715039216716 1015494.3651737 T 48 CATAB v2.0f-lin.ifort 2020-Sep-15 06:58:30 2020-Sep-15 06:58
2164-Jan-23 02:26 < 00:01 Earth 0.397824509623193 0.397821944213992 0.397827075226035 31.4136423771405 31.4134291688936 2511466.601684991 0.785850894706384 471.071684121969 33.3756383425374 74.7621668969612 1675221.35312165 T 48 CATAB v2.0f-lin.ifort 2020-Sep-15 06:58:30 2020-Sep-15 06:58
2166-Sep-11 09:34 < 00:01 Earth 0.206539212875115 0.206535963346653 0.20654246268159 26.381191043023 26.3807020310806 2512428.898492565 0.43267968047219 416.755034464433 28.7581887981725 67.4442505682405 1006814.12978908 T 48 CATAB v2.0f-lin.ifort 2020-Sep-15 06:58:30 2020-Sep-15 06:58
2176-Jan-22 02:24 < 00:01 Earth 0.401419660085171 0.40141773147396 0.401421588766821 31.8313597438491 31.8311512179754 2515848.599810566 0.477299212723419 298.35609902057 33.0875245711946 72.2693749930392 1684793.8940865 T 48 CATAB v2.0f-lin.ifort 2020-Sep-15 06:58:30 2020-Sep-15 06:58
2178-Sep-10 16:43 < 00:01 Earth 0.214668210102965 0.214665701208136 0.214670719089228 25.793451330657 25.7929701155916 2516811.196285915 0.251953510615622 259.194506983949 28.7688856463327 61.7913020819028 1003404.23677744 T 48 CATAB v2.0f-lin.ifort 2020-Sep-15 06:58:30 2020-Sep-15 06:58
2188-Jan-18 17:12 < 00:01 Earth 0.419790774956045 0.419789343375363 0.419792206548323 33.3907543646207 33.3905642767212 2520228.216967809 0.20468143154542 141.735046422989 31.3794084927473 62.3604209996783 1740385.67197943 T 48 CATAB v2.0f-lin.ifort 2020-Sep-15 06:58:30 2020-Sep-15 06:58
2190-Sep-08 11:50 < 00:01 Earth 0.251638685739768 0.251636889810264 0.251640481684778 24.0879111223788 24.0874715405098 2521191.992891170 0.101676868836181 137.065794702541 28.1753934192546 50.6730663034548 1072855.40348833 T 48 CATAB v2.0f-lin.ifort 2020-Sep-15 06:58:30 2020-Sep-15 06:58
2200-Jan-12 23:15 < 00:01 Earth 0.466008824640125 0.466007374536064 0.466010274748902 36.2628138854837 36.2626562123646 2524605.468409478 0.191514628972462 109.320706668139 31.0436803354032 51.4611496537497 1756495.86258296 T 48 CATAB v2.0f-lin.ifort 2020-Sep-15 06:58:30 2020-Sep-15 06:58
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