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4947 Ninkasi (1988 TJ1)
Classification: Amor [NEO]          SPK-ID: 2004947
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 135 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1683455012579379 3.8982e-08  
a 1.370090510062003 1.9149e-09 au
q 1.139441936376872 5.3177e-08 au
i 15.65097574120353 4.3358e-06 deg
node 215.4465205059351 1.2236e-05 deg
peri 192.9098716579505 1.8861e-05 deg
M 241.2323830021278 1.952e-05 deg
tp 2459193.749267351096
(2020-Dec-10.24926735)
3.2025e-05 TDB
period 585.7635103316172
1.60
1.2281e-06
3.362e-09
d
yr
n .6145824955811841 1.2885e-09 deg/d
Q 1.600739083747135 2.2373e-09 au
  Orbit Determination Parameters
   # obs. used (total)      589  
   data-arc span      15540 days (42.55 yr)  
   first obs. used      1978-02-17  
   last obs. used      2020-09-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48807  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Sep-20 06:39:54  

Additional Information
 Earth MOID = .150456 au 
 Jupiter MOID = 3.77006 au 
 T_jup = 4.772 
[ 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 18.0   n/a MPO244224  
rotation period rot_per 21.1 h n/a LCDB (Rev. 2019-August); 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:
[Pravec, P.; Wolf, M.; Sarounova, L. (2019) http://www.asu.cas.cz/~ppravec/neo.htm]
SMASSII spectral type spec_B Sq   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

4947 Ninkasi (1988 TJ1)          Discovered 1988-Oct-12 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
1903-Oct-22 18:46 < 00:01 Earth 0.223022562378651 0.223017798340408 0.223027326436899 8.45969215601599 8.45827979653215 2416410.282106523 0.539807936140163 259.949680732997 14.7080086867138 -23.998188478693 887128.688884424 T 135 CATAB v2.0f-lin.ifort 2020-Sep-20 06:40:09 2020-Sep-20 06:40
1911-Oct-15 06:13 < 00:01 Earth 0.307928165655602 0.307923314148782 0.307933017163069 8.73274823658597 8.7317573210379 2419324.758732538 0.753882802488865 242.958998823447 18.2721467248772 -5.30859664202432 299703.599067955 T 135 CATAB v2.0f-lin.ifort 2020-Sep-20 06:40:09 2020-Sep-20 06:40
1919-Sep-29 16:31 00:02 Earth 0.400253267666976 0.400249322901596 0.40025721249217 8.05854357884525 8.05771745877534 2422231.188034553 1.53990048991946 314.989520918805 25.1662949905183 51.5743849646619 1661017.80407601 T 135 CATAB v2.0f-lin.ifort 2020-Sep-20 06:40:09 2020-Sep-20 06:40
1927-Aug-23 13:47 00:02 Earth 0.477699847265131 0.477697834429805 0.477701863335515 4.50096953711972 4.49973013858306 2425116.074594970 1.84718717448637 1982.44445326152 13.9984312456932 87.1173460001522 2717307.19340099 T 135 CATAB v2.0f-lin.ifort 2020-Sep-20 06:40:09 2020-Sep-20 06:40
1933-Feb-12 04:11 < 00:01 Earth 0.487576610962825 0.487575866016709 0.487577355912987 5.77268333999492 5.77173660730872 2427115.674563860 0.708511901129191 82.0435945310599 10.7466795875911 64.1365905367855 1200399.51679608 T 135 CATAB v2.0f-lin.ifort 2020-Sep-20 06:40:09 2020-Sep-20 06:40
1933-Jul-01 00:51 < 00:01 Mars 0.0168906548810117 0.016888918831216 0.016892391215909 7.44798236914699 7.44570628966837 2427254.535596497 0.117554464046355 140.000542128582 8.85113323126711 -51.9459637263531 224918.225164917 T 135 CATAB v2.0f-lin.ifort 2020-Sep-20 06:40:09 2020-Sep-20 06:40
1941-Jan-23 08:07 00:01 Earth 0.459103383422387 0.459102348224455 0.459104418625305 3.75870622951282 3.75716185469993 2430017.838047333 1.21830520810684 92.0166911754001 7.66402226125418 56.4010071632836 1002576.71725013 T 135 CATAB v2.0f-lin.ifort 2020-Sep-20 06:40:09 2020-Sep-20 06:40
1948-Nov-25 05:06 < 00:01 Earth 0.395606784163509 0.395604509464804 0.395609058990462 9.0315316233198 9.0307858529055 2432880.712416503 0.917405704654316 387.232915398873 31.9930696921279 -73.6171728523845 1349276.63425965 T 135 CATAB v2.0f-lin.ifort 2020-Sep-20 06:40:09 2020-Sep-20 06:40
1956-Nov-12 10:21 < 00:01 Earth 0.309366239861077 0.30936426741663 0.309368212313368 9.32863616219806 9.32771286232544 2435789.931160694 0.259175645733261 127.489868094901 28.1914218603077 -40.7242290821913 860835.983017147 T 135 CATAB v2.0f-lin.ifort 2020-Sep-20 06:40:09 2020-Sep-20 06:40
1964-Nov-06 18:11 < 00:01 Earth 0.232268174892894 0.232266749525954 0.232269600276127 8.83053721433582 8.82923803988048 2438706.257350367 0.145037864811469 121.180058676914 10.8133708929272 -54.4083828349728 1855571.83414087 T 135 CATAB v2.0f-lin.ifort 2020-Sep-20 06:40:09 2020-Sep-20 06:40
1972-Nov-02 21:59 < 00:01 Earth 0.175409926541561 0.175409190128777 0.175410662976062 8.40657945269329 8.40477233869726 2441624.415769180 0.097821234960741 107.794385413071 10.2093175408072 -70.8104339389594 2126899.5648396 T 135 CATAB v2.0f-lin.ifort 2020-Sep-20 06:40:09 2020-Sep-20 06:40
1980-Oct-30 16:46 < 00:01 Earth 0.15026383413712 0.150263661788362 0.150264006485955 8.19757593216797 8.19541256740261 2444543.198463638 0.0732971794310629 15.7279803006004 7.84690830296708 75.0952529612362 2603680.41263762 T 135 CATAB v2.0f-lin.ifort 2020-Sep-20 06:40:09 2020-Sep-20 06:40
1988-Oct-27 08:34 < 00:01 Earth 0.164162933013947 0.164162572028958 0.164163293999063 8.20359709161329 8.2016183672049 2447461.856905741 0.0642250252370487 20.6675336869712 12.8507829635504 -38.8568136263979 1435010.72490093 T 135 CATAB v2.0f-lin.ifort 2020-Sep-20 06:40:09 2020-Sep-20 06:40
1996-Oct-23 04:35 < 00:01 Earth 0.213136410135101 0.213135993769234 0.213136826500968 8.40501358150708 8.40352608922085 2450379.690626674 0.0678797879225061 20.7743028151291 12.8442025745437 -2.51272578249402 1422298.27486535 T 135 CATAB v2.0f-lin.ifort 2020-Sep-20 06:40:09 2020-Sep-20 06:40
2004-Oct-17 03:41 < 00:01 Earth 0.283891030670025 0.283890638918045 0.28389142242207 8.67239365636004 8.67131135350857 2453295.653527303 0.0880124165519686 21.4210654159894 12.7974343435782 30.7719062179426 2030187.58861153 T 135 CATAB v2.0f-lin.ifort 2020-Sep-20 06:40:09 2020-Sep-20 06:40
2012-Oct-06 19:50 < 00:01 Earth 0.365893982149611 0.365893536348189 0.365894427951366 8.53969791643132 8.53884513788364 2456207.326321442 0.152169720143523 32.9165752295243 15.7218348243567 57.0744874818351 2260123.97787456 T 135 CATAB v2.0f-lin.ifort 2020-Sep-20 06:40:09 2020-Sep-20 06:40
2020-Sep-12 14:39 < 00:01 Earth 0.444584349053913 0.444583849896339 0.444584848234736 6.36911462378525 6.3681735770183 2459105.110290523 0.339103746449331 208.886337342873 15.7883056123247 84.6917952722928 2384195.95256603 T 135 CATAB v2.0f-lin.ifort 2020-Sep-20 06:40:09 2020-Sep-20 06:40
2026-Feb-21 13:24 < 00:01 Earth 0.498391714005758 0.498391429723164 0.498391998288351 6.75209250520977 6.75130068127429 2461093.058006973 0.10728926827245 24.2178377434131 13.7813728428076 80.4900439094194 1867944.86964158 T 135 CATAB v2.0f-lin.ifort 2020-Sep-20 06:40:09 2020-Sep-20 06:40
2028-Aug-10 13:56 < 00:01 Earth 0.499785428154738 0.499784991061335 0.499785865252118 4.25076490470756 4.2495105344029 2461994.080776098 0.259909160862305 95.4859580681275 14.1959368813737 79.9237314404926 2586035.12351366 T 135 CATAB v2.0f-lin.ifort 2020-Sep-20 06:40:09 2020-Sep-20 06:40
2031-Apr-20 12:22 < 00:01 Mars 0.0291725086581075 0.0291720450703814 0.0291729722467456 7.36081288503296 7.35947952949885 2462977.015158505 0.0918304581612155 24.7026365210202 8.27946381757413 -21.9681655951792 257255.080282002 T 135 CATAB v2.0f-lin.ifort 2020-Sep-20 06:40:09 2020-Sep-20 06:40
2034-Feb-07 23:59 < 00:01 Earth 0.477591018239151 0.477590660572205 0.477591375906396 5.20312199157344 5.2020496405923 2464001.499470574 0.207619050726712 30.1060985169459 11.0049044601344 60.035258595275 1179685.51566303 T 135 CATAB v2.0f-lin.ifort 2020-Sep-20 06:40:09 2020-Sep-20 06:40
2042-Jan-16 04:06 < 00:01 Earth 0.447956433171147 0.447955889177596 0.447956977168338 3.35014437100849 3.34836843144342 2466900.670751865 0.639770931091507 79.9102806806798 14.3447584491428 -73.0214083456231 1923897.6679762 T 135 CATAB v2.0f-lin.ifort 2020-Sep-20 06:40:09 2020-Sep-20 06:40
2049-Nov-22 04:11 < 00:01 Earth 0.381441546209973 0.381440393751809 0.381442698685375 9.33824135450225 9.33749329410502 2469767.674055135 0.378704339043818 158.283082195583 28.6818652939453 -71.339465807276 1460467.82141661 T 135 CATAB v2.0f-lin.ifort 2020-Sep-20 06:40:09 2020-Sep-20 06:40
2057-Nov-12 11:24 < 00:01 Earth 0.304794231326724 0.304792999122004 0.304795463535134 9.35439411874077 9.35345954915139 2472679.974837073 0.177318455339478 84.5528086816728 25.5270656220936 -46.1031543222743 1065924.09757206 T 135 CATAB v2.0f-lin.ifort 2020-Sep-20 06:40:09 2020-Sep-20 06:40
2065-Nov-07 13:04 < 00:01 Earth 0.236807612781426 0.236806437681971 0.236808787887935 8.88803719533027 8.88677117183537 2475597.044633552 0.121789801873739 88.2482099541471 12.5567341225068 -49.0636224868428 1608714.96615029 T 135 CATAB v2.0f-lin.ifort 2020-Sep-20 06:40:09 2020-Sep-20 06:40
2073-Nov-04 04:59 < 00:01 Earth 0.185033374076009 0.185032437489252 0.185034310683024 8.48792366462348 8.48622696785657 2478515.707877613 0.0998670522993878 109.03447534095 9.28346276689045 -65.0830005536823 2245368.19869141 T 135 CATAB v2.0f-lin.ifort 2020-Sep-20 06:40:09 2020-Sep-20 06:40
2074-Jul-22 17:58 < 00:01 Mars 0.0728924557789807 0.0728916302894974 0.0728932812685053 8.03918161344379 8.03869304550746 2478776.248395714 0.0859818826728457 41.2630110493407 10.522940744865 4.11842942405322 267447.665596668 T 135 CATAB v2.0f-lin.ifort 2020-Sep-20 06:40:09 2020-Sep-20 06:40
2081-Nov-01 08:24 < 00:01 Earth 0.154385270382305 0.154384827773363 0.154385712992336 8.24640821129146 8.24431507848175 2481434.849665390 0.0911148408834011 34.5627333455996 14.0689286895417 -57.4090893506976 1305556.10397777 T 135 CATAB v2.0f-lin.ifort 2020-Sep-20 06:40:09 2020-Sep-20 06:40
2089-Oct-29 16:10 < 00:01 Earth 0.152101048934895 0.152100706930367 0.152101390940883 8.17135219031698 8.16920809938698 2484354.173610601 0.100305673956554 35.5764442835023 11.2116617031915 -67.6282816777005 1771525.69926749 T 135 CATAB v2.0f-lin.ifort 2020-Sep-20 06:40:09 2020-Sep-20 06:40
2097-Oct-26 15:25 < 00:01 Earth 0.178545456183243 0.178544319355318 0.178546593015299 8.24389960336465 8.24208918665271 2487273.142699738 0.135512737975386 71.7874711266894 13.2367640874058 -38.628199462293 1208588.03516482 T 135 CATAB v2.0f-lin.ifort 2020-Sep-20 06:40:09 2020-Sep-20 06:40
2105-Oct-23 14:48 < 00:01 Earth 0.229021542354237 0.229019661850543 0.22902342286017 8.45644684366624 8.45507095456571 2490191.116672262 0.206683844447305 100.467310952772 14.5201707249274 -21.2735786041859 864023.35491395 T 135 CATAB v2.0f-lin.ifort 2020-Sep-20 06:40:09 2020-Sep-20 06:40
2113-Oct-17 11:04 < 00:01 Earth 0.297125838012622 0.297123441052367 0.297128234973013 8.67350212732289 8.67246816828335 2493106.960841632 0.351785738066813 119.945366622735 17.5343465061495 -4.85059718585558 418587.129393629 T 135 CATAB v2.0f-lin.ifort 2020-Sep-20 06:40:09 2020-Sep-20 06:40
2121-Oct-06 18:04 < 00:01 Earth 0.373715155870316 0.373712556034028 0.373717755711405 8.41189799547202 8.41105037872388 2496018.252909050 0.684836875286588 146.356311613634 23.8199394357699 28.0455414581456 1121630.12690775 T 135 CATAB v2.0f-lin.ifort 2020-Sep-20 06:40:09 2020-Sep-20 06:40
2129-Sep-12 14:48 00:02 Earth 0.448000460518434 0.447998228008109 0.448002693952585 6.204305517566 6.2033468362235 2498916.116638476 1.57994328847707 1032.69156195576 17.0524696542836 83.8753473900559 2444455.6737505 T 135 CATAB v2.0f-lin.ifort 2020-Sep-20 06:40:09 2020-Sep-20 06:40
2135-Feb-23 23:19 < 00:01 Earth 0.496635400351938 0.496634765494801 0.496636035209216 6.80127599456341 6.80048711723956 2500906.471564156 0.487818938127744 35.9686828716751 19.4812735458765 34.5105917442007 660237.480834178 T 135 CATAB v2.0f-lin.ifort 2020-Sep-20 06:40:09 2020-Sep-20 06:40
2137-Aug-13 13:39 00:01 Earth 0.499500895317239 0.499499446869926 0.499502343896155 4.31154856647273 4.31031118067352 2501808.068969482 1.10506423188623 418.252707394292 13.8001814559615 80.2376563984163 2827363.11017489 T 135 CATAB v2.0f-lin.ifort 2020-Sep-20 06:40:09 2020-Sep-20 06:40
2143-Feb-11 06:38 < 00:01 Earth 0.477018573838558 0.477017740507271 0.477019407173696 5.36905993178652 5.36801948254608 2503815.776503717 0.708673315731401 81.0243642946696 9.99977221250846 59.9766344630195 1108170.10284463 T 135 CATAB v2.0f-lin.ifort 2020-Sep-20 06:40:09 2020-Sep-20 06:40
2151-Jan-19 23:20 00:02 Earth 0.447912197530727 0.447910824338481 0.447913570729873 3.34170044464651 3.33991983930424 2506715.472539706 1.75298432533649 113.172284755226 15.4523707494142 -53.6742020009813 1189131.92853789 T 135 CATAB v2.0f-lin.ifort 2020-Sep-20 06:40:09 2020-Sep-20 06:40
2158-Nov-23 10:56 < 00:01 Earth 0.381144072282316 0.381141105673896 0.381147038981342 9.40049629120665 9.39975260524473 2509579.955507527 0.853738639746593 334.1097980805 30.7196092267578 -64.2147574567785 1292930.1437555 T 135 CATAB v2.0f-lin.ifort 2020-Sep-20 06:40:09 2020-Sep-20 06:40
2166-Nov-13 17:59 < 00:01 Earth 0.300228738937143 0.300225926536398 0.300231551355808 9.35902353934908 9.35807522666754 2512492.249108717 0.358378640509273 183.051488869627 25.3840699518616 -40.4638677259831 922909.296795081 T 135 CATAB v2.0f-lin.ifort 2020-Sep-20 06:40:09 2020-Sep-20 06:40
2172-May-12 18:42 < 00:01 Mars 0.0204077846682427 0.0204058845298694 0.0204096848277764 7.40494246844383 7.40304775210453 2514499.279146003 0.0985337518531407 100.302868416665 8.37341040292823 -19.2175635529882 123593.494187139 T 135 CATAB v2.0f-lin.ifort 2020-Sep-20 06:40:09 2020-Sep-20 06:40
2174-Nov-08 22:17 < 00:01 Earth 0.233322989425578 0.233320963581598 0.233325015291986 8.88501521610649 8.88372984638922 2515409.428759381 0.202851540654099 153.035123339191 12.4633847106788 -48.9113313563623 1588525.12599035 T 135 CATAB v2.0f-lin.ifort 2020-Sep-20 06:40:09 2020-Sep-20 06:40
2182-Nov-06 02:45 < 00:01 Earth 0.189526232088646 0.189525540336974 0.189526923847472 8.53842048489713 8.53677381187796 2518328.614261336 0.0778614112074494 69.2103011706476 8.6637190995721 -60.9061712717006 2301110.68062361 T 135 CATAB v2.0f-lin.ifort 2020-Sep-20 06:40:09 2020-Sep-20 06:40
2190-Nov-03 23:11 < 00:01 Earth 0.161884139497652 0.161883861631559 0.161884417367132 8.31849395678446 8.31651509705863 2521248.466050427 0.061630868480087 50.1028096223963 8.88146306847034 -77.545958054431 2309464.81170454 T 135 CATAB v2.0f-lin.ifort 2020-Sep-20 06:40:09 2020-Sep-20 06:40
2198-Nov-02 03:42 < 00:01 Earth 0.15013134102625 0.150131116274742 0.150131565778218 8.20288329610467 8.20071942321415 2524168.653867638 0.152967892107942 27.6846978722384 9.58434095254371 -77.0821068355409 1909118.08343475 T 135 CATAB v2.0f-lin.ifort 2020-Sep-20 06:40:09 2020-Sep-20 06:40
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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