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415029 (2011 UL21)
Classification: Apollo [NEO, PHA]          SPK-ID: 2415029
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 182 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .652817557529898 4.8834e-08  
a 2.122702329509571 1.1135e-08 au
q .7369649793961079 1.0455e-07 au
i 34.85185223047949 1.1114e-05 deg
node 275.5565345635638 6.0829e-06 deg
peri 284.7780832801479 9.0929e-06 deg
M 323.9543516691824 5.6264e-06 deg
tp 2459313.605158372485
(2021-Apr-09.10515837)
1.8293e-05 TDB
period 1129.619216178239
3.09
8.8888e-06
2.434e-08
d
yr
n .3186914624363089 2.5077e-09 deg/d
Q 3.508439679623033 1.8405e-08 au
  Orbit Determination Parameters
   # obs. used (total)      872  
   data-arc span      11440 days (31.32 yr)  
   first obs. used      1989-10-29  
   last obs. used      2021-02-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .36563  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 20:37:48  

Additional Information
 Earth MOID = .0188791 au 
 Jupiter MOID = 2.7061 au 
 T_jup = 3.245 
[ 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 15.8   n/a MPO455958  
rotation period rot_per 2.732 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Warner, B.D. (2018) Minor Planet Bull. 45, 366-379.]

415029 (2011 UL21)          Discovered 2011-Oct-17 by CSS at Catalina
Reference: Last Updated: 2014-11-10

[ 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 0.075107219204935 0.0751051598320937 0.0751092786471106 22.7141934789464 22.7140256647153 2420800.522651412 0.231567731217102 154.094213199047 14.143040212603 48.4795908384252 596640.527179685 T 182 CATAB v2.0f-lin.ifort 2021-Feb-24 20:37:50 2021-Feb-24 20:37
1919-Jan-13 19:03 < 00:01 Earth 0.255673333333229 0.255672928635246 0.255673738078372 24.5689676190782 24.5685434453521 2421972.293665016 0.170697821732116 232.991294696862 13.4407094562451 86.2894013579061 2722017.33244527 T 182 CATAB v2.0f-lin.ifort 2021-Feb-24 20:37:50 2021-Feb-24 20:37
1922-Jun-01 14:41 < 00:01 Earth 0.430095310003353 0.430091454948658 0.430099165071739 18.5056216842767 18.5052869132235 2423207.112041795 0.522996895293529 227.596717506003 23.4118395061123 32.5603517431722 1413048.30978442 T 182 CATAB v2.0f-lin.ifort 2021-Feb-24 20:37:50 2021-Feb-24 20:37
1925-Jul-04 20:26 < 00:01 Earth 0.162964495357229 0.16296048235954 0.162968508356715 28.4394643789468 28.4388894656707 2424336.351202208 0.294725505823901 201.935347443677 18.3173192556889 7.73967164396297 211901.510939451 T 182 CATAB v2.0f-lin.ifort 2021-Feb-24 20:37:50 2021-Feb-24 20:37
1950-Jan-02 08:08 < 00:01 Earth 0.417760902360926 0.417757015814755 0.417764788931675 32.3156420292394 32.3154446628929 2433283.839186224 0.253912122119347 251.622630801649 18.3089755491657 39.7521251490434 2111719.75973125 T 182 CATAB v2.0f-lin.ifort 2021-Feb-24 20:37:50 2021-Feb-24 20:37
1953-Jan-18 15:59 < 00:01 Earth 0.363502126005507 0.36349877638598 0.363505475700391 19.8620226017465 19.8616535511051 2434396.165808299 0.0917500604325835 310.492685810409 12.5321710782064 -57.5276409689324 3718577.67569381 T 182 CATAB v2.0f-lin.ifort 2021-Feb-24 20:37:50 2021-Feb-24 20:37
1956-Jun-16 01:43 < 00:01 Earth 0.204929666365262 0.204925210392511 0.204934122338048 21.3781426784567 21.3775344822176 2435640.571667339 0.359008832924562 222.248648493455 19.5605220670885 -1.16270365889944 146250.524984822 T 182 CATAB v2.0f-lin.ifort 2021-Feb-24 20:37:50 2021-Feb-24 20:37
1959-Jul-14 15:09 < 00:01 Earth 0.354587875478925 0.354583760213991 0.354591990743859 33.0831189944026 33.0828918596862 2436764.131203689 0.296913375880532 205.216771193489 16.9839741410924 0.435601146662357 252756.345145294 T 182 CATAB v2.0f-lin.ifort 2021-Feb-24 20:37:50 2021-Feb-24 20:37
1984-Jan-05 18:21 < 00:01 Earth 0.363035468714811 0.363032561236908 0.363038376221749 30.2048202548764 30.2045772646587 2445705.264639784 0.208106169019387 218.326248142921 18.3277756005645 48.6180032304557 2153577.97041596 T 182 CATAB v2.0f-lin.ifort 2021-Feb-24 20:37:50 2021-Feb-24 20:37
1987-Jan-19 13:45 < 00:01 Earth 0.419385040749901 0.419381971620943 0.419388109926538 18.9836512868948 18.9833166117176 2446815.073149215 0.0439374698274938 271.194609320341 13.601979193294 -55.7487691397291 3939942.036501 T 182 CATAB v2.0f-lin.ifort 2021-Feb-24 20:37:50 2021-Feb-24 20:37
1990-Jun-21 17:27 < 00:01 Earth 0.0968439995660574 0.0968402745644833 0.0968477245747109 23.1794139225712 23.1782269291586 2448064.226898787 0.280371747135842 190.336141000801 19.7123018575687 -12.6690064964611 180108.499719533 T 182 CATAB v2.0f-lin.ifort 2021-Feb-24 20:37:50 2021-Feb-24 20:37
1993-Jul-19 06:26 < 00:01 Earth 0.474977137995627 0.474973923201069 0.474980352790213 35.9800079817216 35.9798520697958 2449187.767906174 0.225403554219073 160.410777491174 16.0103884608863 -2.05797400408745 456735.36164244 T 182 CATAB v2.0f-lin.ifort 2021-Feb-24 20:37:50 2021-Feb-24 20:37
2011-Sep-24 02:34 < 00:01 Mars 0.076760035627964 0.0767593876825577 0.0767606835766297 24.1540851313835 24.153930719111 2455828.607155717 0.0564537599573036 42.8890820444885 15.0951597859078 -44.6338678799412 566023.204668462 T 182 CATAB v2.0f-lin.ifort 2021-Feb-24 20:37:50 2021-Feb-24 20:37
2018-Jan-10 12:15 < 00:01 Earth 0.281030736331597 0.281030450646259 0.281031022017095 26.4425020201892 26.4421434625879 2458129.010552406 0.0379689648154968 23.8709035400986 12.0926723685079 -68.5361944085719 3265004.29086907 T 182 CATAB v2.0f-lin.ifort 2021-Feb-24 20:37:50 2021-Feb-24 20:37
2024-Jun-27 20:16 < 00:01 Earth 0.044393849317103 0.0443923476780442 0.0443953509588872 25.882228371428 25.8799093362053 2460489.344201962 0.0931477586847692 76.953055274287 15.591905524594 13.6160669237254 129896.005618967 T 182 CATAB v2.0f-lin.ifort 2021-Feb-24 20:37:50 2021-Feb-24 20:37
2052-Jan-15 00:37 < 00:01 Earth 0.279061306782095 0.279060575983139 0.279062037642868 23.2754554081697 23.2750451867124 2470551.525349943 0.141001588655334 228.16174522719 14.3205054888916 -81.5367439192851 2798762.17055507 T 182 CATAB v2.0f-lin.ifort 2021-Feb-24 20:37:50 2021-Feb-24 20:37
2055-Jun-06 18:43 < 00:01 Earth 0.345449833616413 0.345446147842408 0.345453519393443 19.5237397200224 19.5233446548426 2471790.279945561 0.366159909148632 190.762825578889 14.0216307431264 15.575234264596 1019295.86417338 T 182 CATAB v2.0f-lin.ifort 2021-Feb-24 20:37:50 2021-Feb-24 20:37
2058-Jul-07 03:59 < 00:01 Earth 0.232814797785065 0.232810929836997 0.232818665733902 30.0315898855092 30.0312087966901 2472916.665755196 0.302895743328432 194.019103109825 12.8575802881663 6.2308512359953 335789.226386357 T 182 CATAB v2.0f-lin.ifort 2021-Feb-24 20:37:50 2021-Feb-24 20:37
2083-Jan-07 06:36 < 00:01 Earth 0.338008079489229 0.33800376148947 0.338012397617681 28.7429111117788 28.7426368554896 2481866.774781476 0.351076842547557 393.923014086505 16.5208425472674 56.9425813888513 2457738.98161274 T 182 CATAB v2.0f-lin.ifort 2021-Feb-24 20:37:50 2021-Feb-24 20:37
2086-Jan-18 14:05 < 00:01 Earth 0.476475619394857 0.476469617040374 0.476481621897519 18.4172304095346 18.4169267751632 2482974.087065024 0.0442018693648265 515.369243989131 15.2044063818624 -54.5291213655439 3991189.38234804 T 182 CATAB v2.0f-lin.ifort 2021-Feb-24 20:37:50 2021-Feb-24 20:37
2089-Jun-25 03:48 < 00:01 Earth 0.0178233589432224 0.0178214952423037 0.0178252251863754 24.9569964272738 24.9510056577133 2484227.658630524 0.531206173767023 350.672960440678 11.0855682027733 -74.7252315750142 231718.262887603 T 182 CATAB v2.0f-lin.ifort 2021-Feb-24 20:37:50 2021-Feb-24 20:37
2107-Aug-24 12:38 00:06 Mars 0.0976992977220178 0.0976187028314578 0.0977798948105277 24.5818793010183 24.5817600943044 2490861.026506656 6.40683704444317 4084.88838316689 17.0407940742798 -10.3053078824521 152926.705347077 T 182 CATAB v2.0f-lin.ifort 2021-Feb-24 20:37:50 2021-Feb-24 20:37
2117-Jan-11 12:45 00:07 Earth 0.291111625694422 0.291070979295539 0.291152380095287 25.9007977410198 25.9004443604804 2494289.031445921 7.16106958935474 9072.22276253965 15.090993604236 77.0735588143351 2700668.45549009 T 182 CATAB v2.0f-lin.ifort 2021-Feb-24 20:37:50 2021-Feb-24 20:37
2120-May-25 15:49 00:33 Earth 0.472967551978148 0.472793241620327 0.473141999029109 18.5962769617293 18.5959740203896 2495519.159303150 33.3590947124109 15374.6769605367 31.9655874863279 55.5576786980423 1693588.13953566 T 182 CATAB v2.0f-lin.ifort 2021-Feb-24 20:37:50 2021-Feb-24 20:37
2123-Jul-01 02:51 00:14 Earth 0.0992311313698174 0.0990371974706572 0.0994250735690449 27.0420451164088 27.0410521538927 2496650.618771565 13.8873802800014 9776.22350322915 11.4574907756814 8.41990614977449 186994.714494931 T 182 CATAB v2.0f-lin.ifort 2021-Feb-24 20:37:50 2021-Feb-24 20:37
2148-Jan-01 07:35 00:11 Earth 0.486467806145279 0.486315227083714 0.486620420731782 33.604856902803 33.6046939141933 2505600.815809894 10.5342155766238 10043.7161687538 18.1997073316736 40.7449725755366 2502401.89304413 T 182 CATAB v2.0f-lin.ifort 2021-Feb-24 20:37:50 2021-Feb-24 20:37
2151-Jan-18 10:51 00:04 Earth 0.353627964207762 0.353516963285786 0.353739097192185 20.5643484533444 20.5639820540145 2506713.952174024 3.72144138566572 12116.2939489184 13.5378498510272 -62.7989176676008 3522433.35548578 T 182 CATAB v2.0f-lin.ifort 2021-Feb-24 20:37:50 2021-Feb-24 20:37
2154-Jun-16 20:40 00:15 Earth 0.173405315565887 0.173214512477069 0.17359611903479 21.9420826589306 21.9413823671417 2507959.361126121 14.9346120608585 9523.19704463044 10.7414820272474 -2.42550421282035 104445.753364592 T 182 CATAB v2.0f-lin.ifort 2021-Feb-24 20:37:50 2021-Feb-24 20:37
2157-Jul-14 17:39 00:12 Earth 0.39446431325676 0.394290932514089 0.394637694007794 33.841296801983 33.8410972027255 2509083.235187207 12.262663129665 8646.27108484116 11.3747053379254 -0.618400615942603 54279.025835725 T 182 CATAB v2.0f-lin.ifort 2021-Feb-24 20:37:50 2021-Feb-24 20:37
2182-Jan-06 21:43 00:05 Earth 0.363965519258467 0.36390587663155 0.36402518415265 29.2177253628094 29.217474805213 2518025.404798553 4.90226111316033 5385.38503726894 16.3714080900162 56.471396057814 2654587.33741472 T 182 CATAB v2.0f-lin.ifort 2021-Feb-24 20:37:50 2021-Feb-24 20:37
2185-Jan-18 12:15 < 00:01 Earth 0.457633953052058 0.457564652011347 0.457703277311489 18.7971616691752 18.7968519233797 2519133.010678931 0.0938576673514912 6194.28441584287 15.1328936233402 -56.083053701504 4018890.98854608 T 182 CATAB v2.0f-lin.ifort 2021-Feb-24 20:37:50 2021-Feb-24 20:37
2188-Jun-22 07:40 00:06 Earth 0.0537975050309445 0.0537167962411496 0.0538782217598516 24.0641934559305 24.0621352089595 2520383.819546816 6.14956786985755 4154.6733351376 11.2215600722395 -14.3610524714484 178594.21081085 T 182 CATAB v2.0f-lin.ifort 2021-Feb-24 20:37:50 2021-Feb-24 20:37
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