+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   4947 Ninkasi (1988 TJ1) Classification: Amor [NEO]          SPK-ID: 2004947 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 169 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1683607613576692 3.6302e-08   a 1.370066283442893 1.463e-09 au q 1.139400880851976 4.9699e-08 au i 15.65109134427083 4.0255e-06 deg node 215.4376047454923 1.0641e-05 deg peri 192.9383777637107 1.6283e-05 deg M 4.134561641415305 1.5456e-05 deg tp 2459193.772746933771 (2020-Dec-10.27274693) 2.5144e-05 TDB period 585.747973759454 1.60 9.3819e-07 2.569e-09 d yr n .6145987969697003 9.844e-10 deg/d Q 1.600731686033811 1.7093e-09 au   Orbit Determination Parameters    # obs. used (total)      728      data-arc span      15674 days (42.91 yr)      first obs. used      1978-02-17      last obs. used      2021-01-16      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .51104      source      ORB      producer      Otto Matic      solution date      2021-Apr-12 16:58:35   Additional Information  Earth MOID = .149413 au   Jupiter MOID = 3.77054 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 18.01   n/a MPCxxxxx   rotation period rot_per 21.1 h n/a LCDB (Rev. 2020-October); 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.DB Last 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 0.223024719297507 0.223020814327359 0.223028624281512 8.45970241164723 8.45829006753597 2416410.281938587 0.438611759811337 213.656533504139 13.7009998691244 -24.3595632849356 970791.308022053 T 169 CATAB v2.0f-lin.ifort 2021-Apr-12 16:58:46 2021-Apr-12 16:58 1911-Oct-15 06:12 < 00:01 Earth 0.307930336810446 0.307926343456608 0.307934330164773 8.73275183830095 8.73176093014858 2419324.758504661 0.615878175042154 200.088684005425 17.2402046132476 -5.63032697731725 347984.356320982 T 169 CATAB v2.0f-lin.ifort 2021-Apr-12 16:58:46 2021-Apr-12 16:58 1919-Sep-29 16:30 00:01 Earth 0.400255008911364 0.400251744828142 0.40025827303513 8.05850640248641 8.05768028219893 2422231.187574524 1.26888628403154 260.172352982856 23.3098375768382 51.5515704291885 1816876.66552417 T 169 CATAB v2.0f-lin.ifort 2021-Apr-12 16:58:46 2021-Apr-12 16:58 1927-Aug-23 13:47 00:02 Earth 0.477700718734155 0.477699035651202 0.477702404032534 4.50093563151001 4.49969622589551 2425116.074035937 1.52678406331921 1645.0411818007 13.2047313147729 87.1035494702922 2781460.53580659 T 169 CATAB v2.0f-lin.ifort 2021-Apr-12 16:58:46 2021-Apr-12 16:58 1933-Feb-12 04:11 < 00:01 Earth 0.487576345399178 0.487575710593477 0.487576980207374 5.77265926081364 5.77171252366187 2427115.674346342 0.574045502682775 66.3380414156588 10.2934507256186 62.8837230807888 1236170.73056831 T 169 CATAB v2.0f-lin.ifort 2021-Apr-12 16:58:46 2021-Apr-12 16:58 1933-Jul-01 00:51 < 00:01 Mars 0.0168898468905812 0.0168884734237235 0.0168912205375051 7.44798985937365 7.44571367325122 2427254.535577678 0.0989339691626154 111.224626456787 8.37104976157221 -52.1973161944708 239090.182215204 T 169 CATAB v2.0f-lin.ifort 2021-Apr-12 16:58:46 2021-Apr-12 16:58 1941-Jan-23 08:06 < 00:01 Earth 0.459102992518364 0.459102116028396 0.459103869011567 3.75868003845365 3.75713565155939 2430017.837676040 0.997835744927592 75.4239571141613 6.86855935645138 55.1598037522083 1047247.97638083 T 169 CATAB v2.0f-lin.ifort 2021-Apr-12 16:58:46 2021-Apr-12 16:58 1948-Nov-25 05:06 < 00:01 Earth 0.395605864759807 0.395603945395854 0.395607784220749 9.0315528016291 9.03080703123031 2432880.712161534 0.789682767373851 337.987804820833 29.0204061561832 -74.2818358549705 1490165.83622044 T 169 CATAB v2.0f-lin.ifort 2021-Apr-12 16:58:46 2021-Apr-12 16:58 1956-Nov-12 10:21 < 00:01 Earth 0.309365459235746 0.30936377883302 0.309367139644609 9.32863171324054 9.32770841059748 2435789.931093865 0.225907077776829 110.636742242867 25.9830673842018 -42.2048322929677 964920.801008275 T 169 CATAB v2.0f-lin.ifort 2021-Apr-12 16:58:46 2021-Apr-12 16:58 1964-Nov-06 18:11 < 00:01 Earth 0.232267627041399 0.232266397462322 0.232268856632333 8.83053304966958 8.8292338715366 2438706.257314830 0.126233338038489 103.941711664864 10.2631683618208 -54.2400382030606 1989167.37516789 T 169 CATAB v2.0f-lin.ifort 2021-Apr-12 16:58:46 2021-Apr-12 16:58 1972-Nov-02 21:59 < 00:01 Earth 0.175409660957609 0.175409010312669 0.175410311617675 8.40657773032937 8.40477061322628 2441624.415745830 0.0844414255514395 90.7156439024005 9.20696207202513 -69.8356466144331 2399578.93246676 T 169 CATAB v2.0f-lin.ifort 2021-Apr-12 16:58:46 2021-Apr-12 16:58 1980-Oct-30 16:46 < 00:01 Earth 0.15026381462905 0.150263648526079 0.150263980732106 8.19757597721076 8.19541261217601 2444543.198450316 0.0628694278864719 13.7355868613833 7.20835503170793 69.5761088897213 2732181.22700465 T 169 CATAB v2.0f-lin.ifort 2021-Apr-12 16:58:46 2021-Apr-12 16:58 1988-Oct-27 08:34 < 00:01 Earth 0.164163016449873 0.164162683090145 0.164163349809722 8.20359802943696 8.20161930626029 2447461.856896121 0.055909693499648 19.5924188048282 11.9235132309374 -41.8385318534258 1578643.59478637 T 169 CATAB v2.0f-lin.ifort 2021-Apr-12 16:58:46 2021-Apr-12 16:58 1996-Oct-23 04:35 < 00:01 Earth 0.213136443624296 0.213136039025244 0.213136848223348 8.40501467414931 8.40352718228997 2450379.690625987 0.0615750754176869 20.2474172257503 12.2940330230843 -6.0957239141284 1482008.94749298 T 169 CATAB v2.0f-lin.ifort 2021-Apr-12 16:58:46 2021-Apr-12 16:58 2004-Oct-17 03:41 < 00:01 Earth 0.28389094876497 0.283890582153533 0.283891315376463 8.67239488205681 8.67131257904585 2453295.653540738 0.0811734244893725 20.2634588243744 11.7580690295955 31.979598492634 2208449.83980119 T 169 CATAB v2.0f-lin.ifort 2021-Apr-12 16:58:46 2021-Apr-12 16:58 2012-Oct-06 19:50 < 00:01 Earth 0.365893784607436 0.365893438435716 0.365894130779469 8.53970169832177 8.53884891969121 2456207.326366591 0.131703592325551 29.6404123144725 12.2050322667947 63.1266156441657 2707711.65444351 T 169 CATAB v2.0f-lin.ifort 2021-Apr-12 16:58:46 2021-Apr-12 16:58 2020-Sep-12 14:39 < 00:01 Earth 0.444584103728464 0.444583752568469 0.444584454898061 6.36912831218088 6.36818726691722 2459105.110414512 0.249049321052638 159.07986054152 13.2862267008566 85.8672164159178 2570233.87790367 T 169 CATAB v2.0f-lin.ifort 2021-Apr-12 16:58:46 2021-Apr-12 16:58 2026-Feb-21 13:24 < 00:01 Earth 0.498391842409845 0.498391606758256 0.498392078061462 6.75209616895363 6.75130434565173 2461093.058036076 0.0907648331291758 22.7996655479801 11.333496865166 81.0386431324322 2278329.78352457 T 169 CATAB v2.0f-lin.ifort 2021-Apr-12 16:58:46 2021-Apr-12 16:58 2028-Aug-10 13:56 < 00:01 Earth 0.499785226259336 0.499784907907028 0.499785544612752 4.25076227284452 4.24950790125597 2461994.080875812 0.180592661962679 67.6492832461256 13.0788705424046 82.2242069784787 2754350.61188519 T 169 CATAB v2.0f-lin.ifort 2021-Apr-12 16:58:46 2021-Apr-12 16:58 2031-Apr-20 12:22 < 00:01 Mars 0.0291726671873443 0.029172251853044 0.0291730825222715 7.36081192584261 7.35947857736232 2462977.015171350 0.0797897559189802 21.9546869275301 7.82853535539316 -20.8002077301201 272612.52930641 T 169 CATAB v2.0f-lin.ifort 2021-Apr-12 16:58:46 2021-Apr-12 16:58 2034-Feb-07 23:59 < 00:01 Earth 0.477591195260423 0.477590911566149 0.477591478954914 5.20313045234292 5.20205810350321 2464001.499536411 0.164830905973319 26.6739112202428 9.59730212209831 65.3963512494049 1455423.50208928 T 169 CATAB v2.0f-lin.ifort 2021-Apr-12 16:58:46 2021-Apr-12 16:58 2042-Jan-16 04:06 < 00:01 Earth 0.447956715396763 0.44795630418651 0.447957126608747 3.35014900776619 3.34837307177929 2466900.670959350 0.480607970235624 59.6755929480216 12.7130692701347 -74.0342218351427 2277662.81853979 T 169 CATAB v2.0f-lin.ifort 2021-Apr-12 16:58:46 2021-Apr-12 16:58 2049-Nov-22 04:11 < 00:01 Earth 0.381442145633737 0.381441315241721 0.381442976033017 9.33823315461552 9.33748509473684 2469767.674181329 0.27868164973849 115.212809761147 26.3396237411554 -73.4467273654097 1620015.68120752 T 169 CATAB v2.0f-lin.ifort 2021-Apr-12 16:58:46 2021-Apr-12 16:58 2057-Nov-12 11:24 < 00:01 Earth 0.304794865742511 0.304793977766634 0.304795753720034 9.35439699935512 9.35346243199876 2472679.974894544 0.134677789233096 61.0830536431294 23.8323155214728 -48.4309237981733 1204908.953711 T 169 CATAB v2.0f-lin.ifort 2021-Apr-12 16:58:46 2021-Apr-12 16:58 2065-Nov-07 13:04 < 00:01 Earth 0.23680820632668 0.236807351355786 0.23680906130129 8.88804155878086 8.8867755390808 2475597.044673078 0.0943651435221504 64.757444443886 11.8061936153831 -49.9564802188648 1756715.05533399 T 169 CATAB v2.0f-lin.ifort 2021-Apr-12 16:58:46 2021-Apr-12 16:58 2073-Nov-04 04:59 < 00:01 Earth 0.185033832838707 0.185033140688337 0.1850345250005 8.48792726639343 8.48623057455345 2478515.707910445 0.0781310595577772 82.1278646748836 7.99180082992519 -65.7469981531218 2686948.69203956 T 169 CATAB v2.0f-lin.ifort 2021-Apr-12 16:58:46 2021-Apr-12 16:58 2074-Jul-22 17:58 < 00:01 Mars 0.0728921558533068 0.0728914691599914 0.0728928425466389 8.03917869789238 8.03869012776164 2478776.248402498 0.0746292169412823 34.2884449669218 9.84726033385476 3.10408166229157 316138.196006089 T 169 CATAB v2.0f-lin.ifort 2021-Apr-12 16:58:46 2021-Apr-12 16:58 2081-Nov-01 08:24 < 00:01 Earth 0.154385469179452 0.154385129570716 0.154385808788776 8.24641028530646 8.24431715571854 2481434.849697658 0.071541422209242 27.3467233561788 12.0744093223536 -61.0593061517244 1594192.02993113 T 169 CATAB v2.0f-lin.ifort 2021-Apr-12 16:58:46 2021-Apr-12 16:58 2089-Oct-29 16:10 < 00:01 Earth 0.152100902457084 0.152100622259392 0.15210118265539 8.17135276590599 8.16920867306158 2484354.173645207 0.0786965875624259 26.9106493303396 10.4862863088566 -68.1256250221869 1920474.94937022 T 169 CATAB v2.0f-lin.ifort 2021-Apr-12 16:58:46 2021-Apr-12 16:58 2097-Oct-26 15:26 < 00:01 Earth 0.178544924628538 0.178544044743229 0.178545804516121 8.24389837642998 8.24208795405774 2487273.142748342 0.106150559627067 55.0031957093567 12.3367030346407 -38.2326785509805 1311378.87227014 T 169 CATAB v2.0f-lin.ifort 2021-Apr-12 16:58:46 2021-Apr-12 16:58 2105-Oct-23 14:48 < 00:01 Earth 0.229020670222463 0.229019213817879 0.229022126628322 8.45644413262598 8.4550682378441 2490191.116744746 0.161801319102429 77.6281804677016 13.6615505836996 -21.0323914172361 938588.031093555 T 169 CATAB v2.0f-lin.ifort 2021-Apr-12 16:58:46 2021-Apr-12 16:58 2113-Oct-17 11:04 < 00:01 Earth 0.297124736757653 0.297122874190549 0.297126599324841 8.67350177148883 8.67246780857421 2493106.960962702 0.275076935142086 93.1851999189845 16.64141056207 -4.73534272896534 512043.769727462 T 169 CATAB v2.0f-lin.ifort 2021-Apr-12 16:58:46 2021-Apr-12 16:58 2121-Oct-06 18:05 < 00:01 Earth 0.373713975117125 0.373711947844119 0.373716002392999 8.41191223710925 8.41106461911797 2496018.253140972 0.535032649553751 114.148424616312 22.3596078948455 28.2576678328298 1234580.88858736 T 169 CATAB v2.0f-lin.ifort 2021-Apr-12 16:58:46 2021-Apr-12 16:58 2129-Sep-12 14:49 00:01 Earth 0.447999465695101 0.447997717566207 0.448001214384294 6.20435969505313 6.20340101995414 2498916.117150267 1.23833251724992 807.881304063141 15.6610498738722 83.8974041102254 2550145.64425282 T 169 CATAB v2.0f-lin.ifort 2021-Apr-12 16:58:46 2021-Apr-12 16:58 2135-Feb-23 23:19 < 00:01 Earth 0.496635715112751 0.49663521695588 0.496636213269706 6.80129273177742 6.80050385689501 2500906.471717724 0.388394005316629 29.9131889708711 17.6849129514976 43.8071564988675 823923.22447371 T 169 CATAB v2.0f-lin.ifort 2021-Apr-12 16:58:46 2021-Apr-12 16:58 2137-Aug-13 13:40 < 00:01 Earth 0.499500263810101 0.499499125108749 0.499501402592006 4.31154538060353 4.31030799232489 2501808.069314722 0.87389427863109 330.233943498824 13.2138230735298 80.3679630540145 2897235.33694839 T 169 CATAB v2.0f-lin.ifort 2021-Apr-12 16:58:46 2021-Apr-12 16:58 2143-Feb-11 06:38 < 00:01 Earth 0.477018980644925 0.477018325904835 0.47701963538751 5.36908642516751 5.36804598194929 2503815.776724180 0.564171911866226 65.7338985385794 9.38640436567365 61.3550508222373 1184496.21923804 T 169 CATAB v2.0f-lin.ifort 2021-Apr-12 16:58:46 2021-Apr-12 16:58 2151-Jan-19 23:21 00:01 Earth 0.447912846557986 0.447911763302496 0.447913929817702 3.34171912422841 3.33993853142516 2506715.473080857 1.39286532998869 89.3056833617401 13.9047368934278 -53.9115309012808 1348178.02781875 T 169 CATAB v2.0f-lin.ifort 2021-Apr-12 16:58:46 2021-Apr-12 16:58 2158-Nov-23 10:56 < 00:01 Earth 0.38114542529993 0.381143081136439 0.381147769518992 9.40048150758207 9.39973782309048 2509579.955770914 0.677072669863322 264.16285691451 28.9458564839309 -64.445916188301 1374585.75892147 T 169 CATAB v2.0f-lin.ifort 2021-Apr-12 16:58:46 2021-Apr-12 16:58 2166-Nov-13 17:59 < 00:01 Earth 0.300230014766891 0.300227786736044 0.300232242808934 9.35903044051421 9.3580821325619 2512492.249219109 0.286860896605659 145.269183902957 23.870096271456 -40.7804937874882 991530.912767549 T 169 CATAB v2.0f-lin.ifort 2021-Apr-12 16:58:46 2021-Apr-12 16:58 2172-May-12 18:42 < 00:01 Mars 0.020408518268028 0.02040695511258 0.0204100814381129 7.40493800092036 7.40304335152682 2514499.279160568 0.0848515960269476 82.6239666337789 7.92826080770451 -19.4588409146372 133227.967865961 T 169 CATAB v2.0f-lin.ifort 2021-Apr-12 16:58:46 2021-Apr-12 16:58 2174-Nov-08 22:18 < 00:01 Earth 0.233323921861991 0.23332231847805 0.233325525260202 8.88502211724649 8.88373675366461 2515409.428823383 0.163697142168044 121.887554338282 11.7187452853949 -49.3169142276958 1717328.60580926 T 169 CATAB v2.0f-lin.ifort 2021-Apr-12 16:58:46 2021-Apr-12 16:58 2182-Nov-06 02:45 < 00:01 Earth 0.18952658333865 0.189526038959058 0.189527127722788 8.53842311980941 8.53677645035028 2518328.614286548 0.0651120744555717 55.2346918028559 7.29560850236262 -61.474139444672 2773196.6643709 T 169 CATAB v2.0f-lin.ifort 2021-Apr-12 16:58:46 2021-Apr-12 16:58 2190-Nov-03 23:11 < 00:01 Earth 0.161884116892198 0.161883851017165 0.161884382769725 8.31849376056954 8.31651490052031 2521248.466047872 0.0550921315582851 43.0863523412581 8.41344311191319 -75.9687169288546 2479340.4435286 T 169 CATAB v2.0f-lin.ifort 2021-Apr-12 16:58:46 2021-Apr-12 16:58 2198-Nov-02 03:42 < 00:01 Earth 0.150131282599421 0.150131079615766 0.15013148558329 8.20288236743695 8.20071849345877 2524168.653838392 0.128013745024536 22.4896076552605 9.05444989545955 -77.3113679715197 2063495.04818537 T 169 CATAB v2.0f-lin.ifort 2021-Apr-12 16:58:46 2021-Apr-12 16:58 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-May-18 21:55 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin