+ 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 168 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1683607613431791 3.6303e-08   a 1.370066283515552 1.4629e-09 au q 1.139400880932254 4.9699e-08 au i 15.65109135868616 4.0255e-06 deg node 215.4376047246234 1.0641e-05 deg peri 192.9383778230118 1.6284e-05 deg M 4.13456163279634 1.5456e-05 deg tp 2459193.772746947259 (2020-Dec-10.27274695) 2.5144e-05 TDB period 585.7479738060497 1.60 9.3818e-07 2.569e-09 d yr n .6145987969208094 9.8439e-10 deg/d Q 1.60073168609885 1.7092e-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.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .51102      source      ORB      producer      Otto Matic      solution date      2021-Feb-14 05:23:31   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 18.0   n/a MPO244224   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 0.223024694393967 0.223020796288987 0.223028592512778 8.45970236674126 8.45829002246504 2416410.281941765 0.437834622365793 213.283846913725 13.700422801913 -24.3614959388254 970928.841550814 T 168 CATAB v2.0f-lin.ifort 2021-Feb-14 05:23:32 2021-Feb-14 05:23 1911-Oct-15 06:12 < 00:01 Earth 0.307930313021439 0.307926325853862 0.307934300189506 8.73275163872452 8.73176073047312 2419324.758505571 0.614912699662274 199.779480703009 17.2395821808644 -5.63262630340121 348303.668813156 T 168 CATAB v2.0f-lin.ifort 2021-Feb-14 05:23:32 2021-Feb-14 05:23 1919-Sep-29 16:30 00:01 Earth 0.400254991554261 0.400251731914232 0.400258251234719 8.05850635786495 8.0576802375372 2422231.187575968 1.2671461592468 259.811926270264 23.3098201912684 51.5512608165193 1816892.5423458 T 168 CATAB v2.0f-lin.ifort 2021-Feb-14 05:23:32 2021-Feb-14 05:23 1927-Aug-23 13:47 00:02 Earth 0.477700711250391 0.477699030141244 0.477702394569641 4.50093608053677 4.49969667502676 2425116.074042954 1.52500190080224 1643.11954120774 13.2046151053297 87.1036503301169 2781537.44897436 T 168 CATAB v2.0f-lin.ifort 2021-Feb-14 05:23:32 2021-Feb-14 05:23 1933-Feb-12 04:11 < 00:01 Earth 0.487576346709095 0.487575712556009 0.487576980864703 5.77265930473455 5.7717125675927 2427115.674346981 0.573447796295453 66.2777276534431 10.2924866501788 62.8898765667938 1236426.93955456 T 168 CATAB v2.0f-lin.ifort 2021-Feb-14 05:23:32 2021-Feb-14 05:23 1933-Jul-01 00:51 < 00:01 Mars 0.0168898634949991 0.0168884914050276 0.0168912357646817 7.44798969791063 7.4457135140089 2427254.535579686 0.0988971792245419 111.115307433146 8.37090116727245 -52.1986120477079 239099.52827605 T 168 CATAB v2.0f-lin.ifort 2021-Feb-14 05:23:32 2021-Feb-14 05:23 1941-Jan-23 08:06 < 00:01 Earth 0.45910299434023 0.459102118574842 0.459103870108854 3.75868017872411 3.75713579189391 2430017.837678077 0.997005543024175 75.3636065101032 6.86855650914332 55.1614292625196 1047312.03558012 T 168 CATAB v2.0f-lin.ifort 2021-Feb-14 05:23:32 2021-Feb-14 05:23 1948-Nov-25 05:06 < 00:01 Earth 0.395605870336318 0.395603952244371 0.395607788525118 9.03155210069188 9.03080633024586 2432880.712167060 0.789181632488508 337.776580223475 29.0193192771605 -74.2833966346046 1490230.65890835 T 168 CATAB v2.0f-lin.ifort 2021-Feb-14 05:23:32 2021-Feb-14 05:23 1956-Nov-12 10:21 < 00:01 Earth 0.30936546342879 0.309363783875363 0.309367142988337 9.32863175260179 9.32770844997531 2435789.931094090 0.22580731167856 110.583720220494 25.9824434166939 -42.2080446613017 965020.14357839 T 168 CATAB v2.0f-lin.ifort 2021-Feb-14 05:23:32 2021-Feb-14 05:23 1964-Nov-06 18:11 < 00:01 Earth 0.232267630091742 0.232266400969337 0.232268859226004 8.83053300688981 8.82923382876784 2438706.257315787 0.126195607413559 103.905103141472 10.2629778313469 -54.2411149163902 1989224.79656402 T 168 CATAB v2.0f-lin.ifort 2021-Feb-14 05:23:32 2021-Feb-14 05:23 1972-Nov-02 21:59 < 00:01 Earth 0.175409662124805 0.175409011640931 0.175410312623796 8.40657772537831 8.4047706082865 2441624.415746121 0.084425138748413 90.6935398455539 9.2069279584317 -69.8361252516556 2399598.1870323 T 168 CATAB v2.0f-lin.ifort 2021-Feb-14 05:23:32 2021-Feb-14 05:23 1980-Oct-30 16:46 < 00:01 Earth 0.150263814884113 0.150263648782884 0.150263980985418 8.19757597106852 8.19541260603621 2444543.198450558 0.0628624807850993 13.7356111484183 7.20824180035006 69.5761660101363 2732244.14846707 T 168 CATAB v2.0f-lin.ifort 2021-Feb-14 05:23:32 2021-Feb-14 05:23 1988-Oct-27 08:34 < 00:01 Earth 0.164163016164513 0.164162682825688 0.164163349503468 8.2035980403611 8.20161931718398 2447461.856897144 0.0559070175001196 19.5909543578223 11.9235595787957 -41.8393150472808 1578685.59568093 T 168 CATAB v2.0f-lin.ifort 2021-Feb-14 05:23:32 2021-Feb-14 05:23 1996-Oct-23 04:35 < 00:01 Earth 0.213136443471039 0.213136038873683 0.213136848068395 8.40501466861528 8.40352717675416 2450379.690626036 0.0615748122543148 20.2473256657267 12.2940525074199 -6.0954580782742 1482013.7793586 T 168 CATAB v2.0f-lin.ifort 2021-Feb-14 05:23:32 2021-Feb-14 05:23 2004-Oct-17 03:41 < 00:01 Earth 0.283890949454968 0.283890582830532 0.283891316079461 8.67239472356856 8.67131242054064 2453295.653538954 0.0811747611897123 20.2639693877906 11.7581870944321 31.9777144475252 2208388.31412123 T 168 CATAB v2.0f-lin.ifort 2021-Feb-14 05:23:32 2021-Feb-14 05:23 2012-Oct-06 19:50 < 00:01 Earth 0.365893785380004 0.365893439198195 0.365894131562124 8.5397012467641 8.5388484680904 2456207.326362789 0.131705763296961 29.640883875024 12.2051563125196 63.125716345779 2707684.58987202 T 168 CATAB v2.0f-lin.ifort 2021-Feb-14 05:23:32 2021-Feb-14 05:23 2020-Sep-12 14:39 < 00:01 Earth 0.44458410414103 0.444583752983158 0.44458445530848 6.36912840146954 6.36818735622011 2459105.110415135 0.24904742890228 159.07889805854 13.2862131243388 85.8672448458611 2570232.84996677 T 168 CATAB v2.0f-lin.ifort 2021-Feb-14 05:23:32 2021-Feb-14 05:23 2026-Feb-21 13:24 < 00:01 Earth 0.498391842051062 0.498391606401967 0.498392077700157 6.75209638730247 6.75130456402575 2461093.058037379 0.0907603846187209 22.7997277783592 11.3334169831183 81.0392276044044 2278393.19678278 T 168 CATAB v2.0f-lin.ifort 2021-Feb-14 05:23:32 2021-Feb-14 05:23 2028-Aug-10 13:56 < 00:01 Earth 0.499785226779295 0.499784908438237 0.499785545121489 4.25076230399095 4.24950793241312 2461994.080873443 0.180583777913228 67.6464534109896 13.0787991165288 82.2246387905158 2754351.17196766 T 168 CATAB v2.0f-lin.ifort 2021-Feb-14 05:23:32 2021-Feb-14 05:23 2031-Apr-20 12:22 < 00:01 Mars 0.0291726680941576 0.0291722527884462 0.0291730834004958 7.36081192093182 7.35947857251084 2462977.015172155 0.0797898367573049 21.9533308092497 7.82865401718771 -20.801695055609 272626.805309232 T 168 CATAB v2.0f-lin.ifort 2021-Feb-14 05:23:32 2021-Feb-14 05:23 2034-Feb-07 23:59 < 00:01 Earth 0.477591194966238 0.47759091128638 0.477591478646313 5.20313052317744 5.20205817435186 2464001.499536764 0.164812366236256 26.6724920289692 9.59740879512528 65.397427374599 1455479.65485184 T 168 CATAB v2.0f-lin.ifort 2021-Feb-14 05:23:32 2021-Feb-14 05:23 2042-Jan-16 04:06 < 00:01 Earth 0.447956714853637 0.447956303703351 0.447957126005654 3.35014902700798 3.34837309102944 2466900.670960271 0.480513459041045 59.6653859810014 12.7129867814198 -74.0351158855745 2277663.38613418 T 168 CATAB v2.0f-lin.ifort 2021-Feb-14 05:23:32 2021-Feb-14 05:23 2049-Nov-22 04:11 < 00:01 Earth 0.381442144228945 0.381441314073227 0.381442974391925 9.33823326021697 9.33748520034413 2469767.674180264 0.278631400936801 115.195417731583 26.336167043218 -73.4507585439644 1620250.62028469 T 168 CATAB v2.0f-lin.ifort 2021-Feb-14 05:23:32 2021-Feb-14 05:23 2057-Nov-12 11:24 < 00:01 Earth 0.304794864837504 0.304793977228239 0.304795752448432 9.3543968671596 9.35346229978742 2472679.974895421 0.134647016724875 61.0651069213256 23.8295878070684 -48.441523875254 1205222.15889237 T 168 CATAB v2.0f-lin.ifort 2021-Feb-14 05:23:32 2021-Feb-14 05:23 2065-Nov-07 13:04 < 00:01 Earth 0.236808205140288 0.236807350647573 0.236809059636719 8.88804152319367 8.88677550348242 2475597.044673023 0.0943334582448023 64.7250332243938 11.8058526455211 -49.9606534116319 1756923.36710659 T 168 CATAB v2.0f-lin.ifort 2021-Feb-14 05:23:32 2021-Feb-14 05:23 2073-Nov-04 04:59 < 00:01 Earth 0.18503383206193 0.185033140401521 0.185034523733741 8.4879271908351 8.4862304989732 2478515.707911234 0.0780900009906826 82.0649546460577 7.99189253556065 -65.7463575317821 2686922.13336157 T 168 CATAB v2.0f-lin.ifort 2021-Feb-14 05:23:32 2021-Feb-14 05:23 2074-Jul-22 17:58 < 00:01 Mars 0.0728921359705802 0.0728914498543181 0.0728928220868589 8.03917852981684 8.03868995954948 2478776.248404689 0.0746299076732881 34.2592228114924 9.84594504201479 3.09052019453588 316356.872699723 T 168 CATAB v2.0f-lin.ifort 2021-Feb-14 05:23:32 2021-Feb-14 05:23 2081-Nov-01 08:24 < 00:01 Earth 0.154385469466628 0.154385130084483 0.154385808849362 8.24641032326239 8.24431719368837 2481434.849695816 0.0714835881893929 27.3230816636157 12.0742291016387 -61.0679237496812 1594434.97379282 T 168 CATAB v2.0f-lin.ifort 2021-Feb-14 05:23:32 2021-Feb-14 05:23 2089-Oct-29 16:10 < 00:01 Earth 0.152100903640305 0.152100623748115 0.1521011835331 8.17135276493062 8.16920867210301 2484354.173645189 0.0786039535674333 26.8829538326472 10.4842314855784 -68.1501865124982 1921077.3368349 T 168 CATAB v2.0f-lin.ifort 2021-Feb-14 05:23:32 2021-Feb-14 05:23 2097-Oct-26 15:26 < 00:01 Earth 0.17854492716957 0.178544048611802 0.178545805729612 8.24389835281865 8.24208793046731 2487273.142746747 0.105990262099624 54.923324654529 12.3361794003748 -38.2405377203284 1311733.77864121 T 168 CATAB v2.0f-lin.ifort 2021-Feb-14 05:23:32 2021-Feb-14 05:23 2105-Oct-23 14:48 < 00:01 Earth 0.229020674147653 0.229019220199691 0.229022128096877 8.45644422531779 8.45506833057482 2490191.116745187 0.161518689149203 77.4994259714139 13.6612317838209 -21.0379058360977 939038.024214333 T 168 CATAB v2.0f-lin.ifort 2021-Feb-14 05:23:32 2021-Feb-14 05:23 2113-Oct-17 11:04 < 00:01 Earth 0.297124742773944 0.297122883671617 0.297126601876339 8.67350187644645 8.67246791356547 2493106.960962486 0.274544086254468 93.0125170239052 16.641196135919 -4.74072649839158 512913.091143957 T 168 CATAB v2.0f-lin.ifort 2021-Feb-14 05:23:32 2021-Feb-14 05:23 2121-Oct-06 18:05 < 00:01 Earth 0.373713981565327 0.373711958437595 0.373716004695926 8.41191215426357 8.41106453627871 2496018.253138889 0.533897680976104 113.910663353151 22.3599858756809 28.2559727215754 1234792.35809722 T 168 CATAB v2.0f-lin.ifort 2021-Feb-14 05:23:32 2021-Feb-14 05:23 2129-Sep-12 14:49 00:01 Earth 0.44799947194327 0.447997727726487 0.448001216717677 6.20435926038336 6.20340058523074 2498916.117145464 1.23544868563741 806.016487288313 15.6610904389096 83.8974283881288 2550089.75620251 T 168 CATAB v2.0f-lin.ifort 2021-Feb-14 05:23:32 2021-Feb-14 05:23 2135-Feb-23 23:19 < 00:01 Earth 0.496635712668591 0.496635215595406 0.496636209741888 6.80129265047164 6.80050377557605 2500906.471715602 0.387311594777661 29.8552033793571 17.6820821965118 43.8886940462768 825374.025996799 T 168 CATAB v2.0f-lin.ifort 2021-Feb-14 05:23:32 2021-Feb-14 05:23 2137-Aug-13 13:40 < 00:01 Earth 0.49950026847437 0.499499132515061 0.499501404513804 4.31154539891817 4.31030801065656 2501808.069307400 0.871620578765688 329.389184775694 13.2142975637502 80.367828768448 2896942.49843351 T 168 CATAB v2.0f-lin.ifort 2021-Feb-14 05:23:32 2021-Feb-14 05:23 2143-Feb-11 06:38 < 00:01 Earth 0.477018976632907 0.477018323601499 0.477019629666838 5.36908604132634 5.36804559802516 2503815.776719778 0.562434097530165 65.5378107329025 9.38868611965014 61.3492980489171 1184330.08460048 T 168 CATAB v2.0f-lin.ifort 2021-Feb-14 05:23:32 2021-Feb-14 05:23 2151-Jan-19 23:21 00:01 Earth 0.447912837400322 0.447911757568734 0.447913917236111 3.34171880573322 3.33993821272407 2506715.473068445 1.38818493302948 89.0249211784455 13.9041969258056 -53.9183660149147 1348395.65806356 T 168 CATAB v2.0f-lin.ifort 2021-Feb-14 05:23:32 2021-Feb-14 05:23 2158-Nov-23 10:56 < 00:01 Earth 0.381145402475298 0.381143066822805 0.381147738183016 9.40048178610406 9.3997381015901 2509579.955764846 0.674864130482686 263.328957000638 28.9300556916875 -64.4636127370966 1375507.94365033 T 168 CATAB v2.0f-lin.ifort 2021-Feb-14 05:23:32 2021-Feb-14 05:23 2166-Nov-13 17:59 < 00:01 Earth 0.300229990580738 0.300227771751053 0.300232209421533 9.35903008345171 9.35808177538698 2512492.249217418 0.285821196048172 144.708362370791 23.8618377485664 -40.8041559956726 992468.934409678 T 168 CATAB v2.0f-lin.ifort 2021-Feb-14 05:23:32 2021-Feb-14 05:23 2172-May-12 18:42 < 00:01 Mars 0.0204085654615358 0.0204070106828778 0.0204101202546926 7.40493768212197 7.40304303705528 2514499.279166986 0.0847789741785788 82.1873925111177 7.9260106591462 -19.472148241188 133394.234363262 T 168 CATAB v2.0f-lin.ifort 2021-Feb-14 05:23:32 2021-Feb-14 05:23 2174-Nov-08 22:18 < 00:01 Earth 0.233323889481332 0.23332229347594 0.233325485500862 8.88502172224097 8.88373635842378 2515409.428820920 0.163032521042235 121.336286217792 11.7182903633223 -49.3237202287584 1717775.7700351 T 168 CATAB v2.0f-lin.ifort 2021-Feb-14 05:23:32 2021-Feb-14 05:23 2182-Nov-06 02:45 < 00:01 Earth 0.189526535834442 0.189525994037937 0.18952707763545 8.53842269071506 8.53677602076068 2518328.614281880 0.0649026969625968 54.950796259854 7.29783882013753 -61.4710845528236 2772980.41344676 T 168 CATAB v2.0f-lin.ifort 2021-Feb-14 05:23:32 2021-Feb-14 05:23 2190-Nov-03 23:11 < 00:01 Earth 0.161884073086553 0.16188380738897 0.161884338786629 8.31849335190764 8.31651449122598 2521248.466041913 0.0550734818384243 43.0583633006568 8.41040655750744 -75.9717700094494 2479998.69450787 T 168 CATAB v2.0f-lin.ifort 2021-Feb-14 05:23:32 2021-Feb-14 05:23 2198-Nov-02 03:42 < 00:01 Earth 0.150131266497206 0.150131063940689 0.150131469053936 8.20288208309841 8.20071820881347 2524168.653830487 0.127700779660161 22.4540930218079 9.0454983690268 -77.3746126823487 2065970.56356149 T 168 CATAB v2.0f-lin.ifort 2021-Feb-14 05:23:32 2021-Feb-14 05:23 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Mar-04 03:25 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin