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4487 Pocahontas (1987 UA)
Classification: Amor [NEO]          SPK-ID: 2004487
[ 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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 146 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2965840958229981 4.3744e-08  
a 1.730239877014678 4.1349e-09 au
q 1.217078247533384 7.5933e-08 au
i 16.40612435201385 5.526e-06 deg
node 198.1155100398973 1.4158e-05 deg
peri 173.96231174135 1.5346e-05 deg
M 209.6832211793021 1.012e-05 deg
tp 2459547.606592526599
(2021-Nov-29.10659253)		 2.4271e-05 TDB
period 831.3002333467356
2.28		 2.9799e-06
8.159e-09		 d
yr
n .4330565366867206 1.5524e-09 deg/d
Q 2.243401506495971 5.3612e-09 au
   Orbit Determination Parameters
   # obs. used (total)      608  
   data-arc span      11810 days (32.33 yr)  
   first obs. used      1987-09-24  
   last obs. used      2020-01-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48985  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-25 06:41:39  

Additional Information
 Earth MOID = .218228 au 
 Jupiter MOID = 3.22448 au 
 T_jup = 4.064 
[ 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 17.3   n/a MPO435741  

4487 Pocahontas (1987 UA)          Discovered 1987-Oct-17 by Shoemaker, C. S. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ 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
1905-Sep-24 04:28 < 00:01 Earth 0.410519921717913 0.410514268148971 0.410525575286972 9.76580727345204 9.76514263609358 2417112.685960423 0.640854830170741 282.148231882454 19.4815522669391 -2.31390307462113 249547.833904619 T 146 CATAB v2.0f-lin.ifort 2020-May-25 06:41:51 2020-May-25 06:42
1921-Oct-08 09:31 < 00:01 Earth 0.221753591849781 0.221752613979202 0.221754569722503 8.67692341979962 8.6755385447586 2422970.896244649 0.245575880002244 60.4440042946575 13.1786183475187 37.2615343361599 1602392.45453661 T 146 CATAB v2.0f-lin.ifort 2020-May-25 06:41:51 2020-May-25 06:42
1937-Oct-29 18:20 < 00:01 Earth 0.46741005413842 0.467406330993555 0.46741377758968 8.56734916026805 8.56668375734321 2428836.264113933 0.731878321089506 626.648823160102 14.0929374773029 -72.810949885831 2311785.40569142 T 146 CATAB v2.0f-lin.ifort 2020-May-25 06:41:51 2020-May-25 06:42
1946-Oct-01 21:44 < 00:01 Earth 0.291683091631007 0.291680342062657 0.291685841203933 9.27642614452753 9.27544135490371 2432095.405854980 0.22048213974391 148.922789785176 16.7612589389342 -23.1356601406422 949259.378587096 T 146 CATAB v2.0f-lin.ifort 2020-May-25 06:41:51 2020-May-25 06:42
1962-Oct-14 04:00 < 00:01 Earth 0.290142519647052 0.290140456852638 0.29014458245405 8.81445359770413 8.81341168519698 2437951.666926580 0.202283939493095 141.502719007678 20.16300337539 -43.931624352989 1483719.09854561 T 146 CATAB v2.0f-lin.ifort 2020-May-25 06:41:51 2020-May-25 06:42
1971-Sep-18 09:02 < 00:01 Earth 0.474182255666465 0.47418013090535 0.474184380428738 9.47995248093975 9.47935972696358 2441212.876330354 0.410052780310788 112.497783127757 23.5330508432666 20.0935307239359 1153596.25818206 T 146 CATAB v2.0f-lin.ifort 2020-May-25 06:41:51 2020-May-25 06:42
1987-Oct-07 03:43 < 00:01 Earth 0.221903860753718 0.221903525546158 0.221904195961516 8.7598822771641 8.75851144839182 2447075.654554041 0.075890858251646 28.2740371952888 14.4643317914421 -69.8309123087749 1886959.22884484 T 146 CATAB v2.0f-lin.ifort 2020-May-25 06:41:51 2020-May-25 06:42
2003-Oct-23 15:33 < 00:01 Earth 0.407632595700105 0.407632106910658 0.407633084490479 8.91323299583411 8.91249962090351 2452936.147637579 0.090981377252702 42.5043500611287 11.4247184506309 -58.2702944069196 3232634.95519822 T 146 CATAB v2.0f-lin.ifort 2020-May-25 06:41:51 2020-May-25 06:42
2012-Sep-28 17:06 < 00:01 Earth 0.346670292978937 0.346669866431064 0.34667071952685 9.55140811707285 9.5506033936869 2456199.212529762 0.0729452824129905 22.7553358589518 13.6772277085592 26.4008880572873 2171188.11467114 T 146 CATAB v2.0f-lin.ifort 2020-May-25 06:41:51 2020-May-25 06:42
2028-Oct-11 05:34 < 00:01 Earth 0.247530830940636 0.247530257966931 0.247531403914722 8.72408222641052 8.72284828647147 2462055.731916769 0.0670360255188197 35.5100083796265 19.9675608253789 -45.896776212438 1445638.13513469 T 146 CATAB v2.0f-lin.ifort 2020-May-25 06:41:51 2020-May-25 06:42
2053-Oct-04 20:28 < 00:01 Earth 0.245614117285187 0.245612789760765 0.245615444812708 8.94881752530295 8.94760518987196 2471180.352838263 0.124778967151222 79.9626321148025 16.3800896486287 -34.9695228470818 1182253.93006672 T 146 CATAB v2.0f-lin.ifort 2020-May-25 06:41:51 2020-May-25 06:42
2069-Oct-18 11:05 < 00:01 Earth 0.349615779309427 0.349612866642313 0.349618692001442 8.96644374683435 8.96559374142652 2477037.961719393 0.303814928768946 207.384121781764 16.1911981797516 -45.7236626277245 2406642.7686661 T 146 CATAB v2.0f-lin.ifort 2020-May-25 06:41:51 2020-May-25 06:42
2078-Sep-25 13:55 < 00:01 Earth 0.404582369627648 0.404578771306277 0.404585967949018 9.6776375076527 9.67695697131068 2480302.079946978 0.407118620879736 179.433367674702 19.1017812904827 -0.119219691772967 330807.534015586 T 146 CATAB v2.0f-lin.ifort 2020-May-25 06:41:51 2020-May-25 06:42
2094-Oct-09 17:41 < 00:01 Earth 0.222957723157641 0.222956721403222 0.222958724912503 8.68660941744362 8.68523355841981 2486160.237093675 0.221042545552799 52.6527604128524 16.8163664684721 19.4828959643421 895089.629309718 T 146 CATAB v2.0f-lin.ifort 2020-May-25 06:41:51 2020-May-25 06:42
2110-Nov-01 16:23 00:01 Earth 0.475757990228171 0.475752871091839 0.475763109936775 8.56509462513168 8.5644407261231 2492026.182647518 1.06136895162088 863.157895137913 16.38931938204 -72.828911677321 2147536.47029056 T 146 CATAB v2.0f-lin.ifort 2020-May-25 06:41:51 2020-May-25 06:42
2119-Oct-04 06:54 < 00:01 Earth 0.285259468631628 0.285254924552543 0.28526401272255 9.18761010710709 9.18659340491197 2495284.787585110 0.354068617014627 244.51701303147 16.8529698475025 -22.1341921677044 869154.864380358 T 146 CATAB v2.0f-lin.ifort 2020-May-25 06:41:51 2020-May-25 06:42
2135-Oct-16 13:42 < 00:01 Earth 0.29610918331746 0.296103814168357 0.296114552543788 8.88037777349717 8.8793644366884 2501141.071116949 0.482746239876029 358.93217898206 18.9046871284222 -41.8331297967595 1548561.08741603 T 146 CATAB v2.0f-lin.ifort 2020-May-25 06:41:51 2020-May-25 06:42
2144-Sep-20 15:00 00:01 Earth 0.463404199637914 0.463397137290103 0.463411261995602 9.47888011006085 9.47827350049035 2504403.124945936 1.18971566107951 368.066490378016 22.1094554052377 16.9232074735919 921520.525752288 T 146 CATAB v2.0f-lin.ifort 2020-May-25 06:41:51 2020-May-25 06:42
2160-Oct-08 12:24 < 00:01 Earth 0.220581360673502 0.220580181877955 0.22058253949301 8.74271800008581 8.74133624396895 2510265.016868236 0.375173704535977 132.180320037553 14.6526669610455 -64.3225691622835 1742565.68491189 T 146 CATAB v2.0f-lin.ifort 2020-May-25 06:41:51 2020-May-25 06:42
2176-Oct-25 09:19 00:01 Earth 0.416606508254868 0.416598054438156 0.416614962402977 8.97158277959654 8.97086986994658 2516125.888421867 1.23453953031506 722.006126263542 11.5219148863264 -54.2851657690749 2751498.88675478 T 146 CATAB v2.0f-lin.ifort 2020-May-25 06:41:51 2020-May-25 06:42
2185-Oct-01 04:23 < 00:01 Earth 0.3369342513777 0.336925839653369 0.336942663110285 9.44139415626942 9.44055652991825 2519388.682389482 0.716579479745829 427.643243330155 17.5477849532379 -11.2450014209894 530579.512877303 T 146 CATAB v2.0f-lin.ifort 2020-May-25 06:41:51 2020-May-25 06:42
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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