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(2011 UL21)
Classification: Apollo [NEO, PHA]          SPK-ID: 3582235
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6532038792680992 2.8353e-07  
a 2.122152751410701 2.958e-08 AU
q .7359543417897612 6.0857e-07 AU
i 34.85010115942157 4.2839e-05 deg
node 275.607109073525 6.3092e-05 deg
peri 284.7397449026383 4.7753e-05 deg
M 278.9393881657584 2.8902e-05 deg
tp 2457054.755739279617
(2015-Feb-01.25573928)
9.4406e-05 JED
period 1129.180548597797
3.09
2.3609e-05
6.464e-08
d
yr
n .3188152686893549 6.6657e-09 deg/d
Q 3.508351161031642 4.8901e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      133  
   data-arc span      8306 days (22.74 yr)  
   first obs. used      1989-10-29  
   last obs. used      2012-07-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53138  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Sep-23 17:16:51  

Additional Information
 Earth MOID = .0192581 AU 
 T_jup = 3.246 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.8 mag n/a E2013Q25  

[ 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
1915-Oct-30 00:33 < 00:01 Mars 0.0751095092164751 0.0750989037986313 0.0751201164247676 22.7141660717633 22.7139982624462 2420800.522593489 0.316802219835722 770.095885523104 91.97214348441 48.4774353159973 89787.1629928387 T 23 CATAB v2.0c-linF95 2013-Sep-23 17:16:59 2013-Sep-23 17:17
1919-Jan-13 19:03 < 00:01 Earth 0.255672653471038 0.255670399542489 0.255674908346985 24.56894857481 24.5685243996272 2421972.293584476 0.212909319761892 845.189886120037 57.7819138629544 82.4984429413109 597593.785643481 T 23 CATAB v2.0c-linF95 2013-Sep-23 17:16:59 2013-Sep-23 17:17
1922-Jun-01 14:41 < 00:01 Earth 0.430095034022316 0.430080678812553 0.430109389323626 18.5056224900721 18.5052877188186 2423207.111999702 0.343884413664597 602.17170730572 50.2726427504148 14.6522872846982 291018.129610642 T 23 CATAB v2.0c-linF95 2013-Sep-23 17:16:59 2013-Sep-23 17:17
1925-Jul-04 20:26 < 00:01 Earth 0.162964752983758 0.162950582694782 0.162978923281363 28.4394758724799 28.4389009603451 2424336.351132118 0.346804220374384 681.505422623181 73.4713100686859 10.5193399765126 65146.5933669213 T 23 CATAB v2.0c-linF95 2013-Sep-23 17:16:59 2013-Sep-23 17:17
1950-Jan-02 08:08 < 00:01 Earth 0.417760232663353 0.417746533559715 0.417773931942148 32.3156429259914 32.315445559334 2433283.839071502 0.21730862889498 788.941481809392 55.2056127598721 32.1714693239994 573245.239591751 T 23 CATAB v2.0c-linF95 2013-Sep-23 17:16:59 2013-Sep-23 17:17
1953-Jan-18 15:59 < 00:01 Earth 0.363501884823533 0.363491170601539 0.363512599553536 19.862023188388 19.8616541375125 2434396.165709389 0.0991207448101012 697.974334069859 77.3296727401991 -52.5743148717875 488706.643147125 T 23 CATAB v2.0c-linF95 2013-Sep-23 17:16:59 2013-Sep-23 17:17
1956-Jun-16 01:43 < 00:01 Earth 0.20493047888338 0.204918719091394 0.2049422387315 21.3781324363516 21.3775242422326 2435640.571543448 0.294636985275271 505.075321619834 63.8991087381808 4.24282422325958 62174.8582167784 T 23 CATAB v2.0c-linF95 2013-Sep-23 17:16:59 2013-Sep-23 17:17
1959-Jul-14 15:09 < 00:01 Earth 0.354587011456953 0.354576799921955 0.354597222985455 33.0831049708845 33.0828778355184 2436764.131079187 0.241171698222942 498.733765014496 86.992787321937 4.19038998102838 109004.454515146 T 23 CATAB v2.0c-linF95 2013-Sep-23 17:16:59 2013-Sep-23 17:17
1984-Jan-05 18:21 < 00:01 Earth 0.363035154430446 0.363027766752789 0.363042542205755 30.2048350469398 30.2045920566308 2445705.264506896 0.129344203272029 461.125212729451 61.7459754823365 39.4737972975405 531386.184987028 T 23 CATAB v2.0c-linF95 2013-Sep-23 17:16:59 2013-Sep-23 17:17
1987-Jan-19 13:45 < 00:01 Earth 0.419384541720798 0.419378059324555 0.419391024247295 18.9836556744436 18.9833209989455 2446815.073051219 0.0776035556456411 392.924963978002 86.4295460105006 -51.2052370852964 495415.003104955 T 23 CATAB v2.0c-linF95 2013-Sep-23 17:16:59 2013-Sep-23 17:17
1990-Jun-21 17:27 < 00:01 Earth 0.0968451800242868 0.0968391189116487 0.0968512411548175 23.1793953515403 23.1782083716454 2448064.226757683 0.169384395346409 271.371563482873 82.7914763631245 -8.35795239498994 52799.6884117878 T 23 CATAB v2.0c-linF95 2013-Sep-23 17:16:59 2013-Sep-23 17:17
1993-Jul-19 06:26 < 00:01 Earth 0.47497610607908 0.474971170415374 0.474981041741759 35.9799888423198 35.9798329299723 2449187.767773410 0.116365718115456 242.579803391552 99.3363496505312 -2.27410500940684 280868.671697128 T 23 CATAB v2.0c-linF95 2013-Sep-23 17:16:59 2013-Sep-23 17:17
2011-Sep-24 02:34 < 00:01 Mars 0.0767586971883428 0.0767554004413042 0.0767619940022328 24.1540667376783 24.1539123225957 2455828.607050959 0.0899756288285203 213.904781601438 98.964893933077 -47.819184522353 91261.2515266972 T 23 CATAB v2.0c-linF95 2013-Sep-23 17:16:59 2013-Sep-23 17:17
2018-Jan-10 12:15 < 00:01 Earth 0.281030017665404 0.281028181611578 0.281031853720099 26.4425048878331 26.4421463293539 2458129.010438227 0.106277771642495 120.656831060539 81.3935888315342 73.2518352890097 465015.017732316 T 23 CATAB v2.0c-linF95 2013-Sep-23 17:16:59 2013-Sep-23 17:17
2024-Jun-27 20:15 < 00:01 Earth 0.0443931483441354 0.0443846063836444 0.0444016903661606 25.8822180245541 25.8798989517848 2460489.344083639 0.207445002305332 402.24112571081 61.3628177635296 12.3965326198145 25891.7201434698 T 23 CATAB v2.0c-linF95 2013-Sep-23 17:16:59 2013-Sep-23 17:17
2052-Jan-15 00:36 < 00:01 Earth 0.27906130431887 0.279058995956153 0.279063613734191 23.2753975909344 23.2749873684544 2470551.525316882 0.161730171264886 836.179819886835 48.8477728406182 -85.6112795071768 768471.543035977 T 23 CATAB v2.0c-linF95 2013-Sep-23 17:16:59 2013-Sep-23 17:17
2055-Jun-06 18:43 < 00:01 Earth 0.345447139074982 0.345431533480427 0.345462744783368 19.5237693043658 19.523374236703 2471790.280058563 0.350096168221499 656.077329004024 37.8231684039677 11.2260119249101 240401.501232482 T 23 CATAB v2.0c-linF95 2013-Sep-23 17:16:59 2013-Sep-23 17:17
2058-Jul-07 03:59 < 00:01 Earth 0.232817782265583 0.232800839827912 0.232834724685697 30.0316651768189 30.0312840938405 2472916.665818214 0.390247174462431 817.622055516841 54.5029677343604 7.17409706570632 84562.1059300277 T 23 CATAB v2.0c-linF95 2013-Sep-23 17:16:59 2013-Sep-23 17:17
2083-Jan-07 06:36 < 00:01 Earth 0.338004113560353 0.337980999802527 0.338027229945947 28.7427770570978 28.7425027963116 2481866.774860261 0.503997499711943 1797.94803833824 46.9186506745455 51.1632017806294 782744.838222467 T 23 CATAB v2.0c-linF95 2013-Sep-23 17:16:59 2013-Sep-23 17:17
2086-Jan-18 14:05 < 00:01 Earth 0.476480160388114 0.476449129948752 0.476511192688986 18.4171831302882 18.4168794980311 2482974.086951258 0.137910783635285 1633.94891209965 65.3865787093608 -41.9646483809096 624197.241653118 T 23 CATAB v2.0c-linF95 2013-Sep-23 17:16:59 2013-Sep-23 17:17
2089-Jun-25 03:49 < 00:01 Earth 0.0178222098988747 0.0178126696655314 0.0178318163203855 24.9571026425309 24.9511115121874 2484227.658806586 0.858332082383929 1629.23249899214 44.2083195069555 -74.6971477886852 52983.425352327 T 23 CATAB v2.0c-linF95 2013-Sep-23 17:16:59 2013-Sep-23 17:17
2107-Aug-24 12:43 00:11 Mars 0.0976378932438388 0.0972239725620822 0.0980518942840224 24.5810335404578 24.5809142546705 2490861.029689808 10.8215907147964 20770.4267174441 102.837922591539 -12.5567210677074 30232.5365998039 T 23 CATAB v2.0c-linF95 2013-Sep-23 17:16:59 2013-Sep-23 17:17
2117-Jan-11 12:50 00:12 Earth 0.291080865142947 0.290873503804481 0.291290449506227 25.8980896057342 25.8977361508933 2494289.035023221 11.8125713957087 38259.2596662485 51.503227701826 73.6973764683974 745297.656687428 T 23 CATAB v2.0c-linF95 2013-Sep-23 17:16:59 2013-Sep-23 17:17
2120-May-25 16:14 00:25 Earth 0.472838510606378 0.471948249487227 0.473729007049909 18.5968245237202 18.5965215086271 2495519.176388343 24.6970189319916 38210.8150480937 42.3304510320783 14.9784118840166 370325.648388382 T 23 CATAB v2.0c-linF95 2013-Sep-23 17:16:59 2013-Sep-23 17:17
2123-Jul-01 03:01 00:23 Earth 0.0993748886767392 0.0983845274448619 0.100365251610145 27.0451329367032 27.0441415238586 2496650.625822645 23.3114280333812 46626.671799826 50.4652720871278 7.91996136089855 37404.8942430233 T 23 CATAB v2.0c-linF95 2013-Sep-23 17:16:59 2013-Sep-23 17:17
2148-Jan-01 07:42 00:15 Earth 0.486353761559381 0.48557081343884 0.487137314318503 33.6011671930325 33.6010041483018 2505600.821135705 14.9747648869138 46628.7503602305 47.0854587317755 34.1570273317793 823349.690837188 T 23 CATAB v2.0c-linF95 2013-Sep-23 17:16:59 2013-Sep-23 17:17
2151-Jan-18 10:54 00:07 Earth 0.353710239187159 0.353141564563872 0.35428104143956 20.5621928878827 20.5618265353782 2506713.953992601 6.87853721328292 42448.4943444492 61.8023830042916 -57.3731633658321 633873.201969254 T 23 CATAB v2.0c-linF95 2013-Sep-23 17:16:59 2013-Sep-23 17:17
2154-Jun-16 20:51 00:24 Earth 0.173263742475144 0.172285213711833 0.174242601105719 21.9443558092622 21.9436550178613 2507959.368736501 24.3160065146126 42493.4812734051 37.6229384574558 -2.27579030889431 24228.7437781724 T 23 CATAB v2.0c-linF95 2013-Sep-23 17:16:59 2013-Sep-23 17:17
2157-Jul-14 17:48 00:18 Earth 0.394592902183064 0.393703226356229 0.395482527737865 33.844477114008 33.8442775985456 2509083.241405223 18.4273187695485 43431.6590382375 63.9560494394957 -1.50571512343192 22972.3671099859 T 23 CATAB v2.0c-linF95 2013-Sep-23 17:16:59 2013-Sep-23 17:17
2182-Jan-06 21:46 00:08 Earth 0.363920672319876 0.363611103334464 0.364230686379754 29.2159244002183 29.2156737962976 2518025.407210162 7.65012314803645 24248.1395783837 49.9989122755861 51.1962914446137 792711.554598973 T 23 CATAB v2.0c-linF95 2013-Sep-23 17:16:59 2013-Sep-23 17:17
2185-Jan-18 12:15 < 00:01 Earth 0.457685270440184 0.457325556538321 0.458045263328719 18.7965398249614 18.7962301036497 2519133.010533779 0.252179983458159 19550.2792494858 68.9001164454777 -43.2923629845238 586080.971762918 T 23 CATAB v2.0c-linF95 2013-Sep-23 17:16:59 2013-Sep-23 17:17
2188-Jun-22 07:45 00:11 Earth 0.0537378151295328 0.0533183346727165 0.0541575561772055 24.0653497508705 24.0632893165932 2520383.822616689 10.577122036175 19450.431323607 43.6230880926992 -14.2866445466259 41124.4433554249 T 23 CATAB v2.0c-linF95 2013-Sep-23 17:16:59 2013-Sep-23 17:17
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]
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