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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6531701385027832 2.3956e-07  
a 2.122499146706894 4.9083e-08 AU
q .736146085080313 5.1745e-07 AU
i 34.84752045158587 3.5117e-05 deg
node 275.6088575615153 4.4675e-05 deg
peri 284.7244081911282 3.7632e-05 deg
M 342.7069433378582 2.7403e-05 deg
tp 2457054.754901213766
(2015-Feb-01.25490121)
8.744e-05 JED
period 1129.457031139841
3.09
3.9178e-05
1.073e-07
d
yr
n .3187372251219599 1.1056e-08 deg/d
Q 3.508852208333475 8.1142e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      144  
   data-arc span      9126 days (24.99 yr)  
   first obs. used      1989-10-29  
   last obs. used      2014-10-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54727  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Oct-25 06:15:56  

Additional Information
 Earth MOID = .0208824 AU 
 T_jup = 3.245 
[ 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 15.7 mag n/a MPO311355  

[ 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 00:32 < 00:01 Mars 0.0751060425335733 0.0750938506669056 0.0751182371965156 22.7142095572433 22.7140417405018 2420800.522452335 0.425437189329467 923.984460756334 72.5835309918254 50.3650307350424 116620.486962219 T 28 CATAB v2.0c-linF95 2014-Oct-25 06:16:02 2014-Oct-25 06:16
1919-Jan-13 19:03 < 00:01 Earth 0.255673616839407 0.25567169304502 0.255675542229731 24.5690240653236 24.5685998930424 2421972.293526679 0.299744876030205 1094.13436879921 51.9452336700781 84.5300452623628 667409.216848494 T 28 CATAB v2.0c-linF95 2014-Oct-25 06:16:02 2014-Oct-25 06:16
1922-Jun-01 14:41 < 00:01 Earth 0.430097229596211 0.430075743119766 0.430118716251043 18.5055951901113 18.5052604200729 2423207.111806127 0.529261738310588 893.179071023397 60.494040483596 12.1007809652342 200214.370456293 T 28 CATAB v2.0c-linF95 2014-Oct-25 06:16:02 2014-Oct-25 06:16
1925-Jul-04 20:25 < 00:01 Earth 0.162962754446336 0.162940984732621 0.162984524141094 28.4394120209276 28.4388371004513 2424336.351018098 0.507652346211373 1039.21264188305 66.8033025808352 8.08146608014899 52347.471914899 T 28 CATAB v2.0c-linF95 2014-Oct-25 06:16:02 2014-Oct-25 06:16
1950-Jan-02 08:08 < 00:01 Earth 0.417763154872416 0.417744101361527 0.417782208783413 32.3156993828165 32.3155020178845 2433283.839040878 0.336998149227042 1123.42323489477 50.339326483693 34.021621887652 658004.430905154 T 28 CATAB v2.0c-linF95 2014-Oct-25 06:16:02 2014-Oct-25 06:16
1953-Jan-18 15:59 < 00:01 Earth 0.363500399089953 0.363484358218388 0.363516440948659 19.8620509483453 19.8616818964773 2434396.165723054 0.130721941857527 993.530804264106 63.972636595453 -49.6700292077647 565890.371610965 T 28 CATAB v2.0c-linF95 2014-Oct-25 06:16:02 2014-Oct-25 06:16
1956-Jun-16 01:43 < 00:01 Earth 0.204931015894286 0.204911056446016 0.20495097549256 21.3781108051676 21.3775026120269 2435640.571511245 0.489827733842159 855.336684467537 67.3849478583588 0.760696075127025 32212.3480541809 T 28 CATAB v2.0c-linF95 2014-Oct-25 06:16:02 2014-Oct-25 06:16
1959-Jul-14 15:09 < 00:01 Earth 0.354586811193772 0.354568950524324 0.35460467183901 33.0830802736845 33.0828531380205 2436764.131050626 0.387558963048177 869.304540454965 71.466846303414 1.2431708717383 59771.2749690428 T 28 CATAB v2.0c-linF95 2014-Oct-25 06:16:02 2014-Oct-25 06:16
1984-Jan-05 18:21 < 00:01 Earth 0.363036631979066 0.363025398509457 0.363047865747996 30.2048449048 30.2046019155592 2445705.264544836 0.215506153444704 740.434943753887 53.4795457164155 42.5245499120777 645847.786492772 T 28 CATAB v2.0c-linF95 2014-Oct-25 06:16:02 2014-Oct-25 06:16
1987-Jan-19 13:45 < 00:01 Earth 0.419384156113761 0.419373042473607 0.419395270071422 18.9836574861667 18.9833228103929 2446815.073088490 0.0601513689391429 624.609280747559 70.3296760548537 -45.551823221616 552462.431330747 T 28 CATAB v2.0c-linF95 2014-Oct-25 06:16:02 2014-Oct-25 06:16
1990-Jun-21 17:27 < 00:01 Earth 0.0968440507126469 0.0968321430294287 0.096855958484909 23.1794032232513 23.1782162299176 2448064.226813333 0.293422617124421 535.782011343689 73.8193989976967 -10.0627367638901 39059.7465857421 T 28 CATAB v2.0c-linF95 2014-Oct-25 06:16:02 2014-Oct-25 06:16
1993-Jul-19 06:26 < 00:01 Earth 0.474977406125328 0.474967757948518 0.474987054298328 35.9800015277081 35.9798456158423 2449187.767816630 0.197631393326351 474.824440323627 76.9329429849762 -0.489414957015157 143126.927228216 T 28 CATAB v2.0c-linF95 2014-Oct-25 06:16:02 2014-Oct-25 06:16
2011-Sep-24 02:34 < 00:01 Mars 0.0767593699139706 0.0767570282131322 0.0767617116528957 24.1540721730335 24.153917759339 2455828.607080889 0.0662135949858281 157.79553075072 72.9224632994084 -50.8622974970031 127731.770099354 T 28 CATAB v2.0c-linF95 2014-Oct-25 06:16:02 2014-Oct-25 06:16
2018-Jan-10 12:15 < 00:01 Earth 0.28103090709481 0.281029433772832 0.281032380423049 26.4424898323556 26.4421312748069 2458129.010508792 0.106318753392844 167.353804686653 61.2422906079474 77.3971438910982 619325.138154886 T 28 CATAB v2.0c-linF95 2014-Oct-25 06:16:02 2014-Oct-25 06:16
2024-Jun-27 20:16 < 00:01 Earth 0.0443953668502294 0.0443852152178593 0.044405518648387 25.8822474441782 25.8799284899379 2460489.344182606 0.246818050977655 485.985515606332 58.8004656767536 16.0539622825719 31023.5126915822 T 28 CATAB v2.0c-linF95 2014-Oct-25 06:16:02 2014-Oct-25 06:16
2052-Jan-15 00:36 < 00:01 Earth 0.279060772279734 0.279058631677672 0.27906291364529 23.2755190449926 23.2751088238711 2470551.525208073 0.148069550313963 708.987295305321 43.4461923319005 -84.876524579453 863096.117048801 T 28 CATAB v2.0c-linF95 2014-Oct-25 06:16:02 2014-Oct-25 06:16
2055-Jun-06 18:43 < 00:01 Earth 0.34545281669005 0.345439443601036 0.345466189869216 19.5236963482546 19.5233012856086 2471790.279669282 0.308142230124949 562.790178972633 32.3614719966036 12.1269499410566 301427.845783382 T 28 CATAB v2.0c-linF95 2014-Oct-25 06:16:02 2014-Oct-25 06:16
2058-Jul-07 03:58 < 00:01 Earth 0.232811628377566 0.232797084661061 0.232826172080662 30.0315041931329 30.0311230980384 2472916.665503046 0.346495212095183 701.965782579495 40.5568995290024 7.11000833695366 109680.922955959 T 28 CATAB v2.0c-linF95 2014-Oct-25 06:16:02 2014-Oct-25 06:16
2083-Jan-07 06:35 < 00:01 Earth 0.338012522622638 0.33799220101888 0.33803284629991 28.7430796850886 28.742805434013 2481866.774479954 0.457202922920045 1590.42623158116 40.4402979228025 51.441858075387 911692.669586743 T 28 CATAB v2.0c-linF95 2014-Oct-25 06:16:02 2014-Oct-25 06:16
2086-Jan-18 14:05 < 00:01 Earth 0.476469474958376 0.47644181098261 0.476497140361595 18.4172861822588 18.4169825448913 2482974.087030370 0.110438670125806 1448.14014941563 52.852927872238 -41.3954164378428 763532.8179982 T 28 CATAB v2.0c-linF95 2014-Oct-25 06:16:02 2014-Oct-25 06:16
2089-Jun-25 03:48 < 00:01 Earth 0.0178252617891485 0.0178167097616561 0.0178338672962867 24.9568471865223 24.9508570207236 2484227.658190939 0.781054540112277 1462.78704458475 35.1330874450116 -74.7123755356044 66685.3693099249 T 28 CATAB v2.0c-linF95 2014-Oct-25 06:16:02 2014-Oct-25 06:16
2107-Aug-24 12:32 00:10 Mars 0.0977787211590618 0.0974072970571294 0.0981502094882974 24.5829793390662 24.5828602345114 2490861.022003473 9.73711423819617 18635.503239019 77.2263749150299 -12.5239623627529 40210.6331619951 T 28 CATAB v2.0c-linF95 2014-Oct-25 06:16:02 2014-Oct-25 06:16
2117-Jan-11 12:38 00:11 Earth 0.291152168566895 0.290965262487168 0.291340867605849 25.9044203918616 25.9040671099436 2494289.026452330 10.6267794207739 34372.9731070344 42.7317096837977 73.6575079536003 898355.817337701 T 28 CATAB v2.0c-linF95 2014-Oct-25 06:16:02 2014-Oct-25 06:16
2120-May-25 15:16 00:22 Earth 0.473140345620228 0.472340424960045 0.473940456583552 18.5955307353781 18.5952278925228 2495519.136242406 22.2192603673831 34340.7404939787 37.3716347318507 15.0233289242962 420954.13774018 T 28 CATAB v2.0c-linF95 2014-Oct-25 06:16:02 2014-Oct-25 06:16
2123-Jul-01 02:37 00:21 Earth 0.0990390527061916 0.098149099093483 0.0999290093366979 27.0379138844101 27.0369188440652 2496650.609144181 20.9627200443609 41899.8285553991 38.657763767508 7.95214718402336 48859.0068522855 T 28 CATAB v2.0c-linF95 2014-Oct-25 06:16:02 2014-Oct-25 06:16
2148-Jan-01 07:24 00:13 Earth 0.486618990893716 0.485918775090652 0.487319689485693 33.6097640089953 33.6096010948132 2505600.808512305 13.4004937127477 41693.6438123786 40.9944355204445 34.1430714367273 945884.355888866 T 28 CATAB v2.0c-linF95 2014-Oct-25 06:16:02 2014-Oct-25 06:16
2151-Jan-18 10:47 00:06 Earth 0.353518048048992 0.353010152836032 0.35402764385653 20.5672131175956 20.5668466553935 2506713.949559990 6.16885907103007 37936.5032891473 49.5399194537027 -57.4005835228975 790629.977728928 T 28 CATAB v2.0c-linF95 2014-Oct-25 06:16:02 2014-Oct-25 06:16
2154-Jun-16 20:25 00:22 Earth 0.173593884703553 0.172719672508889 0.17446836020667 21.9390493422145 21.9383497144199 2507959.350801718 21.7352301887285 37958.2354916035 32.4732578117542 -2.25565634758225 27872.6745990121 T 28 CATAB v2.0c-linF95 2014-Oct-25 06:16:02 2014-Oct-25 06:16
2157-Jul-14 17:26 00:16 Earth 0.394292972623299 0.393498519771931 0.395087385338595 33.8370582606198 33.8368585496124 2509083.226697582 16.4657909238691 38782.2421681688 46.384463886341 -1.51060713254714 31735.9912030552 T 28 CATAB v2.0c-linF95 2014-Oct-25 06:16:02 2014-Oct-25 06:16
2182-Jan-06 21:38 00:07 Earth 0.364024693542206 0.363750542861503 0.364299192968019 29.2201254676283 29.2198749713389 2518025.401373152 6.78410774679356 21469.421677734 41.9566524624038 51.1910111770591 944875.807267029 T 28 CATAB v2.0c-linF95 2014-Oct-25 06:16:02 2014-Oct-25 06:16
2185-Jan-18 12:15 < 00:01 Earth 0.457565358301685 0.457247441169003 0.457883493003775 18.7979831360105 18.7976733573179 2519133.010683022 0.208900056124885 17274.6837669139 54.6985294335752 -43.2671705261488 737723.111509601 T 28 CATAB v2.0c-linF95 2014-Oct-25 06:16:02 2014-Oct-25 06:16
2188-Jun-22 07:34 00:09 Earth 0.0538770391388068 0.053506990072957 0.0542472895501941 24.0626487862123 24.0605934458441 2520383.815265202 9.34025732354285 17153.6899969372 35.050291303723 -14.2431363350908 51161.0290619438 T 28 CATAB v2.0c-linF95 2014-Oct-25 06:16:02 2014-Oct-25 06:16
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]
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