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380128 (1997 WB21)
Classification: Apollo [NEO]          SPK-ID: 2380128
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 63 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3173525647417619 4.4131e-08  
a 1.460611239290138 1.6044e-09 au
q .9970825164107694 6.5028e-08 au
i 3.391336890005391 4.7391e-06 deg
node 281.037264052564 5.4692e-05 deg
peri 81.84060687267582 5.7462e-05 deg
M 300.2568546428813 7.2533e-06 deg
tp 2459107.500539392247
(2020-Sep-15.00053939)
1.2942e-05 TDB
period 644.7634109478457
1.77
1.0624e-06
2.909e-09
d
yr
n .5583443382290811 9.1998e-10 deg/d
Q 1.924139962169507 2.1136e-09 au
  Orbit Determination Parameters
   # obs. used (total)      300  
   data-arc span      8312 days (22.76 yr)  
   first obs. used      1997-11-26  
   last obs. used      2020-08-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47424  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-30 12:29:58  

Additional Information
 Earth MOID = .0512996 au 
 Jupiter MOID = 3.54124 au 
 T_jup = 4.566 
[ 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 20.1   n/a MPO285618  

380128 (1997 WB21)          Discovered 1997-Nov-26 by NEAT at Haleakala
Reference: Last Updated: 2013-12-19

[ 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
1900-Aug-08 23:24 < 00:01 Earth 0.116540147144475 0.116539453510847 0.116540840778587 8.53993961650964 8.53726198947162 2415240.475143582 0.107583167522838 36.6528542407916 7.93292191768907 -19.8449475180265 738321.643046987 T 63 CATAB v2.0f-lin.ifort 2020-Aug-30 12:30:11 2020-Aug-30 12:30
1907-Nov-01 07:56 < 00:01 Earth 0.120386369703749 0.120385847939689 0.120386891468076 8.30444572894134 8.30178013438046 2417880.830662075 0.145737119392943 28.0835694670881 13.963965088605 -25.7575816185042 645711.811876137 T 63 CATAB v2.0f-lin.ifort 2020-Aug-30 12:30:11 2020-Aug-30 12:30
1914-Nov-24 00:24 < 00:01 Earth 0.491749429172124 0.491749043377295 0.491749814966953 19.8680314146083 19.8677586948301 2420460.516716522 0.111439818321763 20.5002357794685 15.2553891932125 -31.1459416671124 3490503.1398296 T 63 CATAB v2.0f-lin.ifort 2020-Aug-30 12:30:11 2020-Aug-30 12:30
1923-Jul-18 03:08 < 00:01 Earth 0.47115912750423 0.471158834664239 0.471159420344221 19.1486553767706 19.1483600452416 2423618.630628564 0.0612427690660733 15.2907900738055 9.47479834970703 22.2055410609062 4594169.2315663 T 63 CATAB v2.0f-lin.ifort 2020-Aug-30 12:30:11 2020-Aug-30 12:30
1930-Aug-10 21:46 < 00:01 Earth 0.106921733858257 0.106921366235725 0.106922101480831 8.21082185908277 8.20778629069352 2426199.406978972 0.0884224288699718 18.6572211002391 7.13263247175232 -11.7063284849535 769130.108988542 T 63 CATAB v2.0f-lin.ifort 2020-Aug-30 12:30:11 2020-Aug-30 12:30
1937-Nov-01 21:11 < 00:01 Earth 0.126360129784079 0.12635955299711 0.126360706572053 8.53402438829116 8.53155316892776 2428839.382627822 0.0876968777237268 35.0661370937411 13.2463906337307 -38.1762015893409 870652.489809867 T 63 CATAB v2.0f-lin.ifort 2020-Aug-30 12:30:11 2020-Aug-30 12:30
1944-Nov-23 20:02 < 00:01 Earth 0.489534981372452 0.489534359989734 0.489535602755281 19.8153741050676 19.8150994235997 2431418.335055831 0.0927176148570374 33.3600701395306 13.1719681716013 -23.7850114988364 2700911.32222639 T 63 CATAB v2.0f-lin.ifort 2020-Aug-30 12:30:11 2020-Aug-30 12:30
1953-Jul-17 05:54 < 00:01 Earth 0.484815513434581 0.484815104483778 0.484815922385383 19.5389651965457 19.5386839174771 2434575.745700346 0.0691480394824103 20.3955805969786 11.0881336419243 -1.21625027583079 3061326.45102859 T 63 CATAB v2.0f-lin.ifort 2020-Aug-30 12:30:11 2020-Aug-30 12:30
1960-Aug-08 16:51 < 00:01 Earth 0.125835784249909 0.125835374494034 0.125836194005877 8.84911882015274 8.84672568680402 2437155.202273102 0.0852319284221214 21.2563672748342 8.01422760951188 -17.3581062999198 910337.572269833 T 63 CATAB v2.0f-lin.ifort 2020-Aug-30 12:30:11 2020-Aug-30 12:30
1967-Oct-31 11:53 < 00:01 Earth 0.106652171019981 0.106651704616245 0.106652637423862 7.81737267386554 7.81417620381925 2439794.995050880 0.105340318206024 24.4487542256728 13.2887500899308 -21.5958304444609 642604.809459977 T 63 CATAB v2.0f-lin.ifort 2020-Aug-30 12:30:11 2020-Aug-30 12:30
1974-Nov-23 22:26 < 00:01 Earth 0.47370810971424 0.473707847211595 0.473708372216886 19.345181187959 19.3448904297406 2442375.434858308 0.108112783621308 16.1816239977029 12.9879118548467 80.272258384473 5287625.19363805 T 63 CATAB v2.0f-lin.ifort 2020-Aug-30 12:30:11 2020-Aug-30 12:30
1983-Jul-17 17:08 < 00:01 Earth 0.491400960037607 0.491400447413767 0.491401472661447 19.731028179881 19.730753371696 2445533.213849715 0.0638284948396093 25.56410894725 10.8442495756156 0.775547509921516 2616195.32609235 T 63 CATAB v2.0f-lin.ifort 2020-Aug-30 12:30:11 2020-Aug-30 12:30
1990-Aug-09 12:25 < 00:01 Earth 0.126042951355851 0.126042257978981 0.126043644733015 8.85784682787835 8.85545998328316 2448113.017702429 0.099230009334889 35.9650703321972 7.82081314229899 -16.4169299487491 709859.19732639 T 63 CATAB v2.0f-lin.ifort 2020-Aug-30 12:30:11 2020-Aug-30 12:30
1993-Nov-12 12:47 < 00:01 Mars 0.0426484759658092 0.0426479135399778 0.0426490383935801 6.39548248748949 6.39443278796977 2449304.032796435 0.140051172082784 34.0460322735743 18.7630890284431 42.8020844898868 261428.09159318 T 63 CATAB v2.0f-lin.ifort 2020-Aug-30 12:30:11 2020-Aug-30 12:30
1997-Nov-01 02:07 < 00:01 Earth 0.111743673326844 0.111743193240299 0.111744153413777 8.02859570379331 8.02562519956995 2450753.588407248 0.15560543163203 27.1690248949084 14.1561619392832 -33.6864892657467 662608.783910684 T 63 CATAB v2.0f-lin.ifort 2020-Aug-30 12:30:11 2020-Aug-30 12:30
2004-Nov-24 04:07 < 00:01 Earth 0.479389752127649 0.479389343762464 0.479390160492834 19.5237438380017 19.5234591535972 2453333.671461171 0.115013992498975 20.684180535005 15.9742898903333 -16.0369758019352 3069216.08220761 T 63 CATAB v2.0f-lin.ifort 2020-Aug-30 12:30:11 2020-Aug-30 12:30
2013-Jul-17 18:51 < 00:01 Earth 0.486812389151341 0.486812079393406 0.486812698909304 19.5993251071061 19.5990458445482 2456491.285748992 0.0566909792878881 16.1241039313735 9.3544916597702 20.6242903505454 4687869.12402161 T 63 CATAB v2.0f-lin.ifort 2020-Aug-30 12:30:11 2020-Aug-30 12:30
2020-Aug-09 20:21 < 00:01 Earth 0.121343797761932 0.121343584526118 0.121344010997759 8.7009255951312 8.69840157790457 2459071.348229900 0.0581842166355898 10.9008554177769 5.94785858259169 15.2605253562121 1602558.06658153 T 63 CATAB v2.0f-lin.ifort 2020-Aug-30 12:30:11 2020-Aug-30 12:30
2022-Jan-29 04:26 < 00:01 Mars 0.0965290260010215 0.0965285161826969 0.096529535819401 4.61591135495347 4.6152687840852 2459608.684578877 0.212932210506734 25.8609434100241 15.7470794075543 13.3318492365151 698544.893028774 T 63 CATAB v2.0f-lin.ifort 2020-Aug-30 12:30:11 2020-Aug-30 12:30
2027-Nov-02 22:04 < 00:01 Earth 0.11976008222535 0.11975956972595 0.11976059472507 8.34678768346561 8.3441217441069 2461712.419467801 0.0731683970877562 28.1644999379177 14.1648351234064 -29.1188332793951 729958.452839562 T 63 CATAB v2.0f-lin.ifort 2020-Aug-30 12:30:11 2020-Aug-30 12:30
2034-Nov-25 20:23 < 00:01 Earth 0.497189446689275 0.497188885397902 0.497190007980705 20.0421411776941 20.0418737851859 2464292.349194258 0.0911524269452798 29.7547143084147 14.293141947253 -22.7630405317758 2775666.38190332 T 63 CATAB v2.0f-lin.ifort 2020-Aug-30 12:30:11 2020-Aug-30 12:30
2043-Jul-19 22:32 < 00:01 Earth 0.46139172092249 0.461391278146163 0.461392163698816 18.8693843544469 18.8690783072892 2467450.439199382 0.074434376570586 22.1694091941924 10.8295363512158 -5.93522143480024 2702119.52814045 T 63 CATAB v2.0f-lin.ifort 2020-Aug-30 12:30:11 2020-Aug-30 12:30
2050-Aug-13 18:12 < 00:01 Earth 0.0949052212141757 0.0949047508795902 0.0949056915492199 7.7690328358493 7.76541826839275 2470032.258325355 0.121512487946844 25.9260810625225 7.87314025824167 -26.6210411091386 773506.108960141 T 63 CATAB v2.0f-lin.ifort 2020-Aug-30 12:30:11 2020-Aug-30 12:30
2057-Nov-04 17:31 < 00:01 Earth 0.138325256112159 0.138324744949786 0.138325767274846 9.01511871696226 9.01298178399588 2472672.230090996 0.11059317834823 28.408226903458 14.0899346556502 -30.5826038009864 834040.526029042 T 63 CATAB v2.0f-lin.ifort 2020-Aug-30 12:30:11 2020-Aug-30 12:30
2073-Jul-18 16:08 < 00:01 Earth 0.481832585733294 0.481832136073938 0.481833035392678 19.4629188268161 19.4626347005474 2478407.171903146 0.0674290740589311 22.599522689225 11.0193800986924 -8.22755141661613 3019905.35591029 T 63 CATAB v2.0f-lin.ifort 2020-Aug-30 12:30:11 2020-Aug-30 12:30
2080-Aug-09 21:18 < 00:01 Earth 0.12747974857526 0.127479116629905 0.127480380520991 8.89919435726251 8.89684538554796 2480986.387385862 0.0967520290337587 33.4895442743219 8.04746388502138 -20.4391990655403 843737.406107342 T 63 CATAB v2.0f-lin.ifort 2020-Aug-30 12:30:11 2020-Aug-30 12:30
2087-Nov-01 12:37 < 00:01 Earth 0.101850063005569 0.101849510493408 0.101850615518176 7.69137691355243 7.68797484531629 2483626.025512420 0.162705237237691 30.1226894207684 13.4350724857578 -26.906292522056 554412.283086661 T 63 CATAB v2.0f-lin.ifort 2020-Aug-30 12:30:11 2020-Aug-30 12:30
2094-Nov-25 03:31 < 00:01 Earth 0.468504264816001 0.468503815443498 0.468504714188505 19.1854207793803 19.1851243434553 2486206.646221965 0.117383628481571 22.430071626925 15.9508338336041 -3.62210234714374 2672209.45712791 T 63 CATAB v2.0f-lin.ifort 2020-Aug-30 12:30:11 2020-Aug-30 12:30
2103-Jul-19 16:11 < 00:01 Earth 0.497410441719525 0.497409955891666 0.497410927547383 19.9179073575076 19.9176384167134 2489364.174333004 0.0572597593726497 24.5380951532985 9.17859953615855 9.87102763955002 2991050.01935648 T 63 CATAB v2.0f-lin.ifort 2020-Aug-30 12:30:11 2020-Aug-30 12:30
2110-Aug-11 04:34 < 00:01 Earth 0.132491279235396 0.132490792202232 0.132491766268569 9.06860138199433 9.06638350293141 2491943.690135907 0.0698878885766434 24.3384843555145 5.2056436122542 -3.9762277022311 706938.883087443 T 63 CATAB v2.0f-lin.ifort 2020-Aug-30 12:30:11 2020-Aug-30 12:30
2117-Nov-03 03:36 < 00:01 Earth 0.107407825107299 0.107407498418873 0.107408151796616 7.91536419830977 7.91222953041628 2494584.650074329 0.100186060860681 25.8850153628917 10.4545380983315 -58.1700263535989 1358274.59689964 T 63 CATAB v2.0f-lin.ifort 2020-Aug-30 12:30:11 2020-Aug-30 12:30
2124-Nov-26 18:59 < 00:01 Earth 0.484774253529442 0.484773752084624 0.484774754974454 19.6689450365727 19.6686655925472 2497165.291140594 0.100011586814263 29.520006898147 8.94931879500311 -33.9021478157015 4485150.36169286 T 63 CATAB v2.0f-lin.ifort 2020-Aug-30 12:30:11 2020-Aug-30 12:30
2133-Jul-20 21:11 < 00:01 Earth 0.471279033801285 0.471278490625541 0.471279576977029 19.1740278242819 19.1737329586043 2500323.382318073 0.0729579536106308 27.1120679142745 10.165247096087 2.73936957958872 2241922.16934511 T 63 CATAB v2.0f-lin.ifort 2020-Aug-30 12:30:11 2020-Aug-30 12:30
2136-Oct-25 19:24 < 00:01 Mars 0.029074397158533 0.0290738918083644 0.0290749025112697 6.18009781964838 6.17850430480543 2501516.308474662 0.128923534261715 32.0497379902583 18.2813403829535 48.7911775191755 196128.528995867 T 63 CATAB v2.0f-lin.ifort 2020-Aug-30 12:30:11 2020-Aug-30 12:30
2140-Aug-14 04:15 < 00:01 Earth 0.103658478542713 0.103657916953958 0.103659040131857 8.06550367026572 8.06231608462947 2502904.677268053 0.116894539772252 29.8680927780224 7.54926704131313 -21.1184913707582 715262.6219013 T 63 CATAB v2.0f-lin.ifort 2020-Aug-30 12:30:11 2020-Aug-30 12:30
2147-Nov-06 07:56 < 00:01 Earth 0.126148243718221 0.126147540891047 0.126148946546018 8.62024386832932 8.61779326323463 2505544.830449966 0.0965102345809967 38.2532681094449 14.0616150236932 -25.5556323157509 608800.611496959 T 63 CATAB v2.0f-lin.ifort 2020-Aug-30 12:30:11 2020-Aug-30 12:30
2154-Nov-27 18:56 < 00:01 Earth 0.487453747821312 0.487453107346848 0.487454388295776 19.7500118989074 19.7497351317047 2508123.288730633 0.0910942325303616 31.9757888952792 16.0063774345606 -3.24263019861667 2041403.06692426 T 63 CATAB v2.0f-lin.ifort 2020-Aug-30 12:30:11 2020-Aug-30 12:30
2163-Jul-20 17:08 < 00:01 Earth 0.490214804682356 0.490214239469034 0.490215369895679 19.7271480523788 19.7268725250621 2511280.213629880 0.0620139592857846 28.5487417208817 10.9196014063988 -9.92478711953269 2437611.39242998 T 63 CATAB v2.0f-lin.ifort 2020-Aug-30 12:30:11 2020-Aug-30 12:30
2165-Jan-11 16:26 < 00:01 Mars 0.0783852147837275 0.0783844260764705 0.0783860034912785 4.86301078932564 4.86225968486493 2511821.184855066 0.174924483928105 40.0992241357731 10.5877149564898 11.6450159195042 406348.25408766 T 63 CATAB v2.0f-lin.ifort 2020-Aug-30 12:30:11 2020-Aug-30 12:30
2170-Aug-12 07:20 < 00:01 Earth 0.12839680802334 0.128396122986366 0.128397493060992 8.91696460849171 8.91463706518121 2513859.805837315 0.0894946353782731 37.3435121872774 7.47993767737412 -24.3825670946535 994700.718157379 T 63 CATAB v2.0f-lin.ifort 2020-Aug-30 12:30:11 2020-Aug-30 12:30
2177-Nov-04 03:48 < 00:01 Earth 0.108938004377107 0.108937223475681 0.108938785278984 7.98548650189475 7.98242302313199 2516500.658199266 0.150232081550674 40.533754270546 8.07618901015266 -16.5176487199965 545654.152651647 T 63 CATAB v2.0f-lin.ifort 2020-Aug-30 12:30:11 2020-Aug-30 12:30
2184-Nov-27 09:29 < 00:01 Earth 0.483776453607834 0.483775936684066 0.483776970531602 19.6386840352184 19.6384035833431 2519080.895468500 0.117086529952928 26.2066549975084 14.5665777112862 12.5372014650744 2541313.00885661 T 63 CATAB v2.0f-lin.ifort 2020-Aug-30 12:30:11 2020-Aug-30 12:30
2193-Jul-21 07:15 < 00:01 Earth 0.475755162800272 0.475754464717854 0.475755860882689 19.3154349314273 19.3151449784217 2522238.802274572 0.0811031208437061 34.8609567070583 10.6567526812009 -3.25476297410528 1828957.89888958 T 63 CATAB v2.0f-lin.ifort 2020-Aug-30 12:30:11 2020-Aug-30 12:30
2200-Aug-15 17:11 < 00:01 Earth 0.105265117445069 0.105264243780961 0.105265991110237 8.10324254940778 8.10011824910742 2524820.215940520 0.167881835081821 46.7257746442747 7.20204537220507 -21.506185596295 695236.37609009 T 63 CATAB v2.0f-lin.ifort 2020-Aug-30 12:30:11 2020-Aug-30 12:30
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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