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(2021 HA)
Classification: Apollo [NEO]          SPK-ID: 54137799
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ hide orbit diagram ]

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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2304699923262437 0.00048153  
a 1.192622913312702 0.00052835 au
q .917759119633421 0.0001677 au
i 3.158578279134694 0.0053677 deg
node 224.4433490505795 0.00044702 deg
peri 49.96407761876367 0.0041619 deg
M 222.537658122821 0.10025 deg
tp 2459382.149575830580
(2021-Jun-16.64957583)
0.011764 TDB
period 475.7219061307516
1.30
0.31613
0.0008655
d
yr
n .7567446345450707 0.00050288 deg/d
Q 1.467486706991983 0.00065012 au
  Orbit Determination Parameters
   # obs. used (total)      21  
   data-arc span      16 days  
   first obs. used      2021-04-06  
   last obs. used      2021-04-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      7  
   norm. resid. RMS      .37785  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-22 06:20:18  

Additional Information
 Earth MOID = .00784257 au 
 Jupiter MOID = 3.62251 au 
 T_jup = 5.293 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 25.58   .30265 E2021-HB4 autocmod 2.9c

[ 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
1948-Sep-24 17:47 8_10:12 Earth 0.468708425494212 0.299799683492314 0.638578453955248 20.0333356305004 20.0330518651232 2432819.241107236 12132.1918898275 8512859.58298951 68.5626534619525 -6.66905758493442 106657.376205278 T 4 CATAB v2.0g-lin.ifort 2021-Apr-22 06:20:19 2021-Apr-22 06:20
1956-Mar-28 08:49 4_13:51 Earth 0.49448600666495 0.395040890136595 0.593941093365664 20.9537453522228 20.9534881946287 2435560.867303171 6591.28398176241 4960410.36634779 12.0128110399013 1.29643362459884 124840.102616512 T 4 CATAB v2.0g-lin.ifort 2021-Apr-22 06:20:19 2021-Apr-22 06:20
1956-Dec-08 10:15 6_09:59 Earth 0.465846693013888 0.453038900121062 0.478715816634269 8.47953524508528 8.47886069443572 2435815.926868802 9238.76401557288 693477.411035535 82.6979898661685 22.6124602290117 203758.220816406 T 4 CATAB v2.0g-lin.ifort 2021-Apr-22 06:20:19 2021-Apr-22 06:20
1961-Jan-27 10:25 3_02:43 Earth 0.437802440665402 0.429938447494637 0.445694178522078 7.85841046339231 7.85763596437506 2437326.933943005 4483.45497154785 429568.079712474 202.692743363983 -23.8936789417495 73604.1572484698 T 4 CATAB v2.0g-lin.ifort 2021-Apr-22 06:20:19 2021-Apr-22 06:20
1961-Sep-17 18:11 2_08:40 Earth 0.314593599602551 0.282978611453949 0.346322660283699 15.4653757957187 15.4648281374031 2437560.257381042 3399.51403397503 1607361.73715555 71.2863261139946 -10.6698352769358 111125.560664294 T 4 CATAB v2.0g-lin.ifort 2021-Apr-22 06:20:19 2021-Apr-22 06:20
1965-Apr-29 19:30 1_22:07 Earth 0.018867057995831 0.0113745214841263 0.0276444767666768 5.97527514193494 5.95159350428317 2438880.312224743 2767.15187247594 475531.696388899 42.9958120315851 -28.0254200257484 27046.8187238882 T 4 CATAB v2.0g-lin.ifort 2021-Apr-22 06:20:19 2021-Apr-22 06:20
1965-Oct-20 17:48 2_04:19 Earth 0.318194173966194 0.310785712560297 0.325617794465774 5.65683061794575 5.65535013369073 2439054.241404595 3139.19390198055 385688.350528962 63.1072505234172 16.6339039218473 99323.523051875 T 4 CATAB v2.0g-lin.ifort 2021-Apr-22 06:20:19 2021-Apr-22 06:20
1969-Dec-11 15:58 2_08:33 Earth 0.475777403351789 0.472405468708188 0.479165104402473 8.61844510689985 8.61779528252404 2440567.165121616 3393.36158582278 216931.817733418 122.855106817176 39.0296606369478 221535.46310284 T 4 CATAB v2.0g-lin.ifort 2021-Apr-22 06:20:19 2021-Apr-22 06:20
1974-Jan-23 00:07 3_16:36 Earth 0.452697604743402 0.444620770977657 0.460832313581961 8.12276417167092 8.12203953603487 2442070.504624150 5316.14846155023 478054.639722138 185.748929204044 -32.2833331141951 116119.97491392 T 4 CATAB v2.0g-lin.ifort 2021-Apr-22 06:20:19 2021-Apr-22 06:20
1974-Sep-20 02:39 1_20:12 Earth 0.378204919161106 0.329877807278937 0.426656082870465 17.3461279428412 17.3457217916581 2442310.610112408 2651.56149966142 2437027.71125412 69.5313849883996 -8.00269035581093 101056.871872628 T 4 CATAB v2.0g-lin.ifort 2021-Apr-22 06:20:19 2021-Apr-22 06:20
1982-Apr-02 00:05 3_03:26 Earth 0.402908350778156 0.336239741283577 0.469590581296888 18.2224394929316 18.2220765787864 2445061.503436598 4526.31292978465 3326885.26426563 11.5711580382691 2.02793373038904 164880.855858753 T 4 CATAB v2.0g-lin.ifort 2021-Apr-22 06:20:19 2021-Apr-22 06:20
1982-Nov-30 06:06 5_17:32 Earth 0.454156756981994 0.440591624646251 0.467779427685138 8.23767525726641 8.23696302657486 2445303.754035787 8252.10864693279 724222.429886783 84.286179626767 20.6245925503031 171314.578248994 T 4 CATAB v2.0g-lin.ifort 2021-Apr-22 06:20:19 2021-Apr-22 06:20
1987-Jan-11 02:28 5_22:34 Earth 0.475913310262326 0.468654046772025 0.483291130961962 8.53448250087186 8.5338264704105 2446806.602634147 8554.16300351463 522979.258860036 206.668442954523 -45.7500927006509 148847.54771536 T 4 CATAB v2.0g-lin.ifort 2021-Apr-22 06:20:19 2021-Apr-22 06:20
1995-Apr-09 15:02 5_20:20 Earth 0.249045850529918 0.138362331492967 0.359887038851688 13.6901929497346 13.6894114373338 2449817.126163382 8419.88633960575 5532104.41487312 12.0387171590268 2.96908461945455 118187.362264311 T 4 CATAB v2.0g-lin.ifort 2021-Apr-22 06:20:19 2021-Apr-22 06:20
2000-Jan-01 04:24 9_21:52 Earth 0.485023914854355 0.480380296736277 0.4899100703913 8.72998219465369 8.72935290368456 2451544.683669670 14272.0779019621 590788.226559422 214.434829566886 -66.2818623197526 187905.87470691 T 4 CATAB v2.0g-lin.ifort 2021-Apr-22 06:20:19 2021-Apr-22 06:20
2012-Dec-21 12:07 7_09:18 Earth 0.485023922842198 0.477907527351047 0.492249643061189 8.74184628820876 8.74121785136062 2456283.004995462 10637.6804709813 509648.5810947 126.943775904097 45.4392696502309 247498.204256614 T 4 CATAB v2.0g-lin.ifort 2021-Apr-22 06:20:19 2021-Apr-22 06:20
2017-Feb-04 05:40 4_17:36 Earth 0.418478547544193 0.406762674818236 0.430260214276395 7.45971873716299 7.45886516242822 2457788.736206692 6815.65693736802 641647.563331103 154.304354013338 -24.0945876214545 91512.4057242853 T 4 CATAB v2.0g-lin.ifort 2021-Apr-22 06:20:19 2021-Apr-22 06:20
2017-Sep-13 03:29 2_11:50 Earth 0.234063556968667 0.185419233304502 0.28327629626758 13.0202711586917 13.0193968332634 2458009.644872910 3590.14701309115 2506792.65734412 59.9822009906567 -12.9885001045648 118180.404034234 T 4 CATAB v2.0g-lin.ifort 2021-Apr-22 06:20:19 2021-Apr-22 06:20
2021-Apr-30 09:06 00:01 Earth 0.0198956952810922 0.0197799887993971 0.0200113920191184 5.94752167225276 5.92496153862921 2459334.879157002 1.18230275270595 5727.47759162228 15.9121780229007 0.286462360937526 295.536618534086 T 4 CATAB v2.0g-lin.ifort 2021-Apr-22 06:20:19 2021-Apr-22 06:20
2021-Oct-19 04:01 01:41 Earth 0.316528079407399 0.314672779262699 0.318383372470668 5.55664162010857 5.55512650042658 2459506.667683448 100.729776628936 92486.0018363161 70.2927777671451 -0.633437461464581 4465.54109940918 T 4 CATAB v2.0g-lin.ifort 2021-Apr-22 06:20:19 2021-Apr-22 06:20
2025-Mar-29 18:16 2_04:09 Earth 0.470281120956672 0.423227651982703 0.517337990865701 20.2372737675957 20.2369938012624 2460764.261418397 3129.37197100578 2347298.37785668 16.4361319850181 1.57133739494138 105426.547608189 T 4 CATAB v2.0g-lin.ifort 2021-Apr-22 06:20:19 2021-Apr-22 06:20
2025-Dec-04 03:25 3_22:09 Earth 0.467778437555278 0.463293023883557 0.472285983356983 8.43630184574013 8.43562663797578 2461013.642222674 5648.83538835569 275719.593426025 133.614910594975 35.5992503093778 183772.680744539 T 4 CATAB v2.0g-lin.ifort 2021-Apr-22 06:20:19 2021-Apr-22 06:20
2030-Jan-08 12:12 7_11:41 Earth 0.482990153292408 0.470328649863958 0.495805208117187 8.64694365680015 8.64630564681867 2462510.008193281 10781.3377554919 766767.411617877 197.311920669788 -34.0625303673244 126077.972141711 T 4 CATAB v2.0g-lin.ifort 2021-Apr-22 06:20:19 2021-Apr-22 06:20
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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