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1221 Amor (1932 EA1)
Classification: Amor [NEO]          SPK-ID: 2001221
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 101 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4352849480969389 3.4983e-08  
a 1.919498150734781 9.5616e-10 au
q 1.083969497820022 6.7525e-08 au
i 11.8765395826284 4.9915e-06 deg
node 171.3270073161356 2.362e-05 deg
peri 26.69479191018597 2.5439e-05 deg
M 38.52241014417849 8.1275e-06 deg
tp 2458896.558034715118
(2020-Feb-17.05803472)
2.1913e-05 TDB
period 971.3594596627876
2.66
7.258e-07
1.987e-09
d
yr
n .3706146024716492 2.7692e-10 deg/d
Q 2.755026803649541 1.3724e-09 au
  Orbit Determination Parameters
   # obs. used (total)      540  
   data-arc span      32319 days (88.48 yr)  
   first obs. used      1932-03-12  
   last obs. used      2020-09-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45568  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Sep-10 06:23:49  

Additional Information
 Earth MOID = .107451 au 
 Jupiter MOID = 2.21364 au 
 T_jup = 3.781 
[ 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 17.7   n/a PDS3 (MPC 17261)  
diameter diameter 1.0 km n/a Hazards due to Comets and Asteroids (1994), Ed. T. Gehrels, pp.540-543 based on assumed medium albedo (0.15)

1221 Amor (1932 EA1)          Discovered 1932-Mar-12 by Delporte, E. at Uccle
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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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-Mar-08 23:35 < 00:01 Earth 0.28504886349756 0.285043560978665 0.28505416601955 13.2693788276305 13.2686743714589 2415087.482407256 0.408104452467291 268.550841230055 14.2043873922718 -10.1013919300026 448178.42588159 T 101 CATAB v2.0f-lin.ifort 2020-Sep-10 06:24:01 2020-Sep-10 06:24
1908-Mar-14 13:15 < 00:01 Earth 0.183910830724825 0.183906962742794 0.183914698719599 10.7701447085731 10.7687994349213 2418015.051788667 0.368925750901199 207.509246192138 13.7576519264515 -21.7080884502264 617936.36725021 T 101 CATAB v2.0f-lin.ifort 2020-Sep-10 06:24:01 2020-Sep-10 06:24
1916-Mar-17 22:06 < 00:01 Earth 0.135429339401131 0.135427248601632 0.13543143022013 9.55751489847048 9.55545615900365 2420940.420685894 0.282236389310258 132.460101772049 13.2500124847859 -38.3234909614591 806837.898610723 T 101 CATAB v2.0f-lin.ifort 2020-Sep-10 06:24:01 2020-Sep-10 06:24
1924-Mar-20 12:01 < 00:01 Earth 0.11622388436645 0.116223127016226 0.116224641726577 8.85562512095526 8.85303594693644 2423865.000988398 0.172412574607175 68.1604416864996 12.5929472278897 -57.9029485865565 1017603.39334314 T 101 CATAB v2.0f-lin.ifort 2020-Sep-10 06:24:01 2020-Sep-10 06:24
1932-Mar-22 14:22 < 00:01 Earth 0.107828470197271 0.107828223330531 0.107828717064409 8.39493163007094 8.3919876293836 2426789.098843547 0.106255104270933 31.8036239178731 11.5167717743989 -81.5766192334511 1260094.54673723 T 101 CATAB v2.0f-lin.ifort 2020-Sep-10 06:24:01 2020-Sep-10 06:24
1940-Mar-22 20:08 < 00:01 Earth 0.105276959440739 0.105276728739102 0.105277190142388 8.36842495622491 8.36540003690066 2429711.338892087 0.0810464057479814 17.7963136152269 11.4318249299148 -84.5944707515293 1279136.6142047 T 101 CATAB v2.0f-lin.ifort 2020-Sep-10 06:24:01 2020-Sep-10 06:24
1948-Mar-21 19:24 < 00:01 Earth 0.109861492365026 0.109861223966343 0.109861760763746 8.57476365570148 8.57193476382351 2432632.308340184 0.0745606278607578 14.6895330802536 11.2818230139315 -40.0725505942069 1144417.18874595 T 101 CATAB v2.0f-lin.ifort 2020-Sep-10 06:24:01 2020-Sep-10 06:24
1956-Mar-21 06:18 < 00:01 Earth 0.114812188409573 0.114811868412432 0.114812508406831 8.71841450694044 8.71575223041859 2435553.762603416 0.0759883280550958 17.7345363516077 10.4729252283195 -32.7491927176155 1047470.06694691 T 101 CATAB v2.0f-lin.ifort 2020-Sep-10 06:24:01 2020-Sep-10 06:24
1964-Mar-19 02:53 < 00:01 Earth 0.128180709879959 0.128180236713119 0.128181183047033 9.31287082438818 9.31063849560308 2438473.620480995 0.0774593955982277 25.5079278648883 11.0006750030286 -24.9237784396324 858981.335976645 T 101 CATAB v2.0f-lin.ifort 2020-Sep-10 06:24:01 2020-Sep-10 06:24
1972-Mar-14 08:55 < 00:01 Earth 0.195411726781444 0.195411035125347 0.195412418437574 11.0809543130533 11.0797237363595 2441390.871570051 0.0770248727174921 34.77979278025 12.4415118555488 -7.96155138518264 761211.611431004 T 101 CATAB v2.0f-lin.ifort 2020-Sep-10 06:24:01 2020-Sep-10 06:24
1980-Mar-09 23:31 < 00:01 Earth 0.280166161527006 0.280165370509761 0.280166952544252 13.1913011899698 13.1905802138028 2444308.480121856 0.0804073304763002 39.4793237368815 13.4508481862376 -2.61134971207564 910880.958796582 T 101 CATAB v2.0f-lin.ifort 2020-Sep-10 06:24:01 2020-Sep-10 06:24
1988-Mar-05 01:32 < 00:01 Earth 0.368012704054733 0.368011878360388 0.368013529749078 15.6005981786686 15.6001340752636 2447225.563638431 0.0817489806199858 41.1746726799027 14.1124730956934 -0.563713362486103 1154212.90539854 T 101 CATAB v2.0f-lin.ifort 2020-Sep-10 06:24:01 2020-Sep-10 06:24
2065-May-14 22:38 < 00:01 Earth 0.496999729219672 0.496998642347157 0.497000816092244 16.5038714597959 16.503546615948 2475420.443077163 0.169004800603837 55.0554572859082 15.3073971981111 -10.555549840849 1290248.79741048 T 101 CATAB v2.0f-lin.ifort 2020-Sep-10 06:24:01 2020-Sep-10 06:24
2073-Apr-30 15:11 < 00:01 Earth 0.368688758298103 0.368687663015244 0.368689853581087 12.3265193334825 12.3259330301962 2478328.132815160 0.1798379511799 55.6666978268239 15.6418854623013 -11.6358723183289 906589.15410419 T 101 CATAB v2.0f-lin.ifort 2020-Sep-10 06:24:01 2020-Sep-10 06:24
2081-Apr-15 04:26 < 00:01 Earth 0.256670753797444 0.256669720453865 0.256671787141241 9.07849576347464 9.07735222856199 2481234.684711502 0.165520728711312 52.9815559852435 14.8923266729777 -14.0526427233208 726061.010379839 T 101 CATAB v2.0f-lin.ifort 2020-Sep-10 06:24:01 2020-Sep-10 06:24
2089-Apr-07 05:22 < 00:01 Earth 0.197487529852165 0.197486668985505 0.19748839071896 7.9002049719206 7.89849699787003 2484148.723490179 0.114230421001003 43.7652758629833 14.3080384664846 -11.9105678237001 685072.752617879 T 101 CATAB v2.0f-lin.ifort 2020-Sep-10 06:24:01 2020-Sep-10 06:24
2097-Mar-31 04:56 < 00:01 Earth 0.140527817733243 0.140527236421154 0.14052839904542 7.56478287395045 7.56227604009123 2487063.705374092 0.0834223955121133 29.6198868068573 11.987878204381 12.9752659033695 854922.666286607 T 101 CATAB v2.0f-lin.ifort 2020-Sep-10 06:24:01 2020-Sep-10 06:24
2105-Mar-28 01:54 < 00:01 Earth 0.113976702730477 0.113976363081872 0.113977042379607 7.85022347639416 7.8472449829788 2489981.579326330 0.075232912147944 22.0985130637295 8.7036599661777 44.3210658956711 1827945.77986039 T 101 CATAB v2.0f-lin.ifort 2020-Sep-10 06:24:01 2020-Sep-10 06:24
2113-Mar-28 03:53 < 00:01 Earth 0.115344847481917 0.115344531516444 0.11534516344783 7.82708739325384 7.82413553243845 2492903.661603407 0.0769583235132696 20.7905969527104 8.92205122344473 46.2363858096465 1810354.2603099 T 101 CATAB v2.0f-lin.ifort 2020-Sep-10 06:24:01 2020-Sep-10 06:24
2121-Mar-27 04:24 < 00:01 Earth 0.110950151737489 0.110949858624929 0.110950444850944 7.97464666217932 7.97163466174428 2495824.683257618 0.0901053489477025 25.0878306615919 9.30223826170828 61.0499925891517 1746297.76536516 T 101 CATAB v2.0f-lin.ifort 2020-Sep-10 06:24:01 2020-Sep-10 06:24
2129-Mar-25 14:40 < 00:01 Earth 0.108298970191445 0.108298754040951 0.108299186342272 8.25902630860914 8.25604684885394 2498745.111352216 0.130670376758584 42.4387433396082 10.4879687764169 86.5232058735585 1457374.89456797 T 101 CATAB v2.0f-lin.ifort 2020-Sep-10 06:24:01 2020-Sep-10 06:24
2137-Mar-26 08:41 < 00:01 Earth 0.110882010711063 0.110881732055595 0.110882289376244 8.11545298584471 8.11249144485608 2501667.861793958 0.233686549262621 78.6832694857617 10.3366730234002 83.151218473581 1515053.5296622 T 101 CATAB v2.0f-lin.ifort 2020-Sep-10 06:24:01 2020-Sep-10 06:24
2145-Mar-25 20:47 < 00:01 Earth 0.109182569686599 0.109182354621197 0.109182784752081 8.23178211779115 8.22881699008459 2504589.366235050 0.465895250680397 160.843835615759 10.7201925315734 -89.9020663146872 1410079.24945882 T 101 CATAB v2.0f-lin.ifort 2020-Sep-10 06:24:01 2020-Sep-10 06:24
2153-Mar-23 13:24 < 00:01 Earth 0.114652602892825 0.114649315216405 0.114655890939999 8.77998424846366 8.77733696663271 2507509.058578484 0.885580483225813 364.931264520352 11.9284508275266 -63.3753756917992 1112843.17742814 T 101 CATAB v2.0f-lin.ifort 2020-Sep-10 06:24:01 2020-Sep-10 06:24
2161-Mar-21 22:18 00:02 Earth 0.131469090440682 0.131459159999501 0.13147902170802 9.30064584168497 9.29846649422528 2510429.429193839 1.49420041422692 718.01943407188 12.580042474057 -46.4157098729845 952525.91425288 T 101 CATAB v2.0f-lin.ifort 2020-Sep-10 06:24:01 2020-Sep-10 06:24
2169-Mar-18 15:14 00:02 Earth 0.169781003050782 0.169759290291649 0.169802716587337 10.4834844628051 10.4819873703673 2513348.134469172 2.19232674936628 1225.00881308718 13.1515265924579 -27.9028462787374 747859.932951565 T 101 CATAB v2.0f-lin.ifort 2020-Sep-10 06:24:01 2020-Sep-10 06:24
2177-Mar-12 21:33 00:03 Earth 0.260938946662555 0.260906054087428 0.260971839464577 12.9541242641731 12.9533359876235 2516264.397734977 2.5667807769726 1684.51084544368 13.6288602998695 -13.1830954210512 536920.706106422 T 101 CATAB v2.0f-lin.ifort 2020-Sep-10 06:24:01 2020-Sep-10 06:24
2185-Mar-07 20:53 00:03 Earth 0.370320551820497 0.370281594435595 0.370359509279349 15.731193835879 15.7307364537696 2519181.370108666 2.71544398352593 1960.09934443579 13.9369021146135 -7.66673065063733 440110.027831011 T 101 CATAB v2.0f-lin.ifort 2020-Sep-10 06:24:01 2020-Sep-10 06:24
2193-Mar-02 19:31 00:03 Earth 0.477659983292193 0.47761701011728 0.477702956499417 18.6413728026415 18.6410735630236 2522098.313458278 2.9589517107933 2151.83459786929 14.0983278545602 -5.23734918375186 392045.493943513 T 101 CATAB v2.0f-lin.ifort 2020-Sep-10 06:24:01 2020-Sep-10 06:24
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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