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137199 (1999 KX4)
Classification: Amor [NEO]          SPK-ID: 2137199
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 365 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2925687907220981 1.3965e-08  
a 1.457362304802798 1.1002e-09 au
q 1.030983577642673 2.03e-08 au
i 16.57034793905371 2.5116e-06 deg
node 104.9241542650421 6.86e-06 deg
peri 76.42719470920946 8.9119e-06 deg
M 35.46289002056267 3.7849e-06 deg
tp 2458937.197428925003
(2020-Mar-28.69742892)
6.7391e-06 TDB
period 642.6133226531991
1.76
7.2772e-07
1.992e-09
d
yr
n .5602124750754385 6.344e-10 deg/d
Q 1.883741031962922 1.4221e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2873  
   # delay obs. used      1  
   # Doppler obs. used      0  
   data-arc span      15345 days (42.01 yr)  
   first obs. used      1978-08-10  
   last obs. used      2020-08-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .32431  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-31 09:31:30  

Additional Information
 Earth MOID = .190697 au 
 Jupiter MOID = 3.1749 au 
 T_jup = 4.541 
[ 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 16.9   n/a MPO268077  
rotation period rot_per 2.767 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Warner, B.D. (2013) Minor Planet Bull. 40, 137-145.]
[Carbognani, A. (2014) Minor Planet Bull. 41, 4-8.]

137199 (1999 KX4)          Discovered 1999-May-20 by LINEAR at Socorro
Reference: 20061205/Numbers.arcLast Updated: 2006-12-13

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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
1911-Jan-22 12:29 < 00:01 Earth 0.46452888445958 0.464526972463609 0.464530796457108 18.9688972073736 18.9685948218391 2419059.020459201 0.0907207210250638 104.389065107814 7.51318646139377 -24.0969863777944 3280553.02443401 T 365 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:45 2020-Aug-31 09:32
1911-Jun-24 15:02 < 00:01 Earth 0.444421177489088 0.444420094395343 0.444422260586927 9.20284799315199 9.20219649867991 2419212.126086318 0.188651272443871 87.5354537281546 11.2571958478081 52.5203535321739 4977188.3322953 T 365 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:45 2020-Aug-31 09:32
1918-Jan-27 20:05 < 00:01 Earth 0.262876547053681 0.262875213838753 0.262877880275483 13.2893922478126 13.2886295230297 2421621.336924835 0.0423359983237145 94.6823490511279 7.15076130332126 -45.5697867586567 3289610.49869738 T 365 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:45 2020-Aug-31 09:32
1918-Jun-08 13:10 < 00:01 Earth 0.323350174635743 0.323349325895828 0.323351023396667 8.50286879044656 8.50189962364112 2421753.048633147 0.176168264465288 137.518822506656 4.84930110007452 72.1860952043953 14720464.5376158 T 365 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:45 2020-Aug-31 09:32
1925-Jan-27 03:57 < 00:01 Earth 0.192839566551544 0.19283918659117 0.192839946524348 9.63670030196134 9.63526639765444 2424177.664686586 0.0662154653612226 83.1018529840909 5.65438748973682 77.3985566142982 3827059.56346353 T 365 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:45 2020-Aug-31 09:32
1925-May-26 13:06 < 00:01 Earth 0.26388897456088 0.263888874322569 0.263889074809482 9.24177405830428 9.24068145769768 2424297.045985669 0.0865177368763924 101.134886199556 2.90532085357319 -87.6972109769341 7315706.47252704 T 365 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:45 2020-Aug-31 09:32
1932-Jan-16 18:25 < 00:01 Earth 0.316890326066252 0.316889210266261 0.316891441875376 8.79856920104876 8.79761351574406 2426723.267553341 0.16466266044661 101.590383148738 3.09276542773302 56.8322784966392 6293360.07501376 T 365 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:45 2020-Aug-31 09:32
1932-May-24 18:09 < 00:01 Earth 0.348489291970559 0.348488209568075 0.34849037437754 13.2252093440405 13.2246312082499 2426852.256527177 0.0651222919342491 82.609903821963 3.7806516914663 -49.2771779753732 8160271.15801432 T 365 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:45 2020-Aug-31 09:32
1938-Dec-29 15:37 < 00:01 Earth 0.477549090640086 0.477548116480769 0.477550064802253 9.25313885720537 9.25253585429808 2429262.150628246 0.164766947277323 76.0354879453124 4.80988283548857 50.4319225866453 6043852.91375652 T 365 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:45 2020-Aug-31 09:32
1955-Jun-29 06:52 < 00:01 Earth 0.481376739041607 0.481376089122281 0.481377388961753 9.42957078737974 9.42898377285238 2435287.786133660 0.112419174313775 47.0642597014931 13.1469425915747 49.0441795654845 4298665.45078888 T 365 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:45 2020-Aug-31 09:32
1962-Jan-26 21:19 < 00:01 Earth 0.316557428538958 0.316556540848538 0.316558316230728 14.8299076871432 14.8293401037101 2437691.388455552 0.0372400188626438 55.2229438926838 7.30977884155802 -37.1025943024734 3344331.96980377 T 365 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:45 2020-Aug-31 09:32
1962-Jun-13 10:16 < 00:01 Earth 0.356428649434325 0.356428102886118 0.356429195987231 8.64057563525714 8.63971043065727 2437828.927632446 0.103652367223209 71.7528961366802 6.25665226039989 68.2166887812412 12749920.2487075 T 365 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:45 2020-Aug-31 09:32
1969-Jan-28 09:57 < 00:01 Earth 0.190083103241414 0.190082951377118 0.190083255106921 10.3712254779249 10.3698738191498 2440249.914759128 0.0328148578674586 44.5715206840678 6.34924324248543 -84.6363894264992 3606905.25639849 T 365 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:45 2020-Aug-31 09:32
1969-May-29 15:50 < 00:01 Earth 0.266902365459374 0.26690223471743 0.266902496205809 8.75576653695064 8.75462630281064 2440371.159851476 0.0651131725141838 61.675883782083 2.96322049381168 84.587659085415 8703647.68233441 T 365 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:45 2020-Aug-31 09:32
1976-Jan-21 07:27 < 00:01 Earth 0.272891811721962 0.272891297979078 0.27289232546694 8.80048338200898 8.79937384267447 2442798.810414733 0.0744665326064591 45.792315550613 3.35479087689291 56.2125121225723 5604900.18197751 T 365 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:45 2020-Aug-31 09:32
1976-May-24 12:33 < 00:01 Earth 0.308332785679141 0.308332331265963 0.308333240093826 11.8291319733835 11.8284014179351 2442923.023163407 0.049271579107286 41.0741723730886 3.39634674604417 -56.8211371508645 7991570.69880669 T 365 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:45 2020-Aug-31 09:32
1983-Jan-04 06:34 < 00:01 Earth 0.432017570882413 0.432017119866008 0.432018021899727 9.10298813111786 9.1023105783362 2445338.773710119 0.073341152192016 39.0753520303653 4.35108326900143 55.375203647784 6091714.97194528 T 365 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:45 2020-Aug-31 09:32
1983-May-30 07:19 < 00:01 Earth 0.47350038202858 0.473499791771283 0.473500972286145 17.3602110259373 17.3598868796307 2445484.804712625 0.0561563721804881 34.2917356633546 4.36265525825907 -31.1539634135464 7425675.6601292 T 365 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:45 2020-Aug-31 09:32
2006-Jan-25 13:50 < 00:01 Earth 0.3797012495297 0.379701015556032 0.37970148350339 16.5662779065029 16.5658543113906 2453761.076640014 0.0255766864766118 13.7070520689293 7.29805323120197 -38.3224583024692 5132976.04287105 T 365 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:45 2020-Aug-31 09:32
2006-Jun-18 17:37 < 00:01 Earth 0.393926261991174 0.3939261232843 0.393926400698137 8.86156367973753 8.86080036127986 2453905.233908057 0.027744569827482 19.6076824206258 6.03429317049827 79.5563968598701 17191091.4967972 T 365 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:45 2020-Aug-31 09:32
2013-Jan-28 23:24 < 00:01 Earth 0.21142932355942 0.211429188460041 0.211429458658799 11.5000496452612 11.4989537523577 2456321.474662938 0.026802329237033 7.84690262875062 6.72091233138936 -83.4991856637296 4171147.94982183 T 365 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:45 2020-Aug-31 09:32
2013-Jun-03 00:30 < 00:01 Earth 0.284223440483007 0.284223389113484 0.284223491852547 8.50402701439259 8.50292457179734 2456446.520557262 0.02632224042323 11.5825887339481 2.51653284779621 -87.5219889561819 12143249.1367176 T 365 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:45 2020-Aug-31 09:32
2020-Jan-25 08:09 < 00:01 Earth 0.229185136123496 0.229185027045715 0.229185245201303 9.00108616056155 8.99979445909458 2458873.839561814 0.0294340653769955 7.97411175511887 4.36776346379716 60.9453005492238 4573793.56263462 T 365 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:45 2020-Aug-31 09:32
2020-May-25 01:05 < 00:01 Earth 0.276130264166095 0.276130175104095 0.276130353228096 10.4825306240638 10.4816100658054 2458994.544952717 0.0463639056207797 6.6358580113594 3.7359240345998 -64.040016792458 6441241.86619311 T 365 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:45 2020-Aug-31 09:32
2027-Jan-10 03:47 < 00:01 Earth 0.380569885037495 0.38056970954531 0.380570060529854 8.95372019376919 8.95293821784091 2461415.657880432 0.0334926815126118 16.0021039145592 3.78593078203673 59.5064700524794 6713115.90856927 T 365 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:45 2020-Aug-31 09:32
2027-May-28 10:47 < 00:01 Earth 0.411323896210791 0.411323715467683 0.411324076953945 15.4486664699001 15.4482471520864 2461553.949621722 0.0450977295509025 12.1012187218086 4.65094176468943 -46.2901278064091 8465592.34615378 T 365 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:45 2020-Aug-31 09:32
2050-Jan-23 16:36 < 00:01 Earth 0.45281943200717 0.452818813289949 0.452820050724519 18.5700439158522 18.5697270480763 2469830.191752977 0.0406151948899753 33.5027033389676 7.58470337828972 -23.5919566073359 3425512.58790033 T 365 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:45 2020-Aug-31 09:32
2050-Jun-24 05:08 < 00:01 Earth 0.436353179135298 0.436352826366446 0.436353531904497 9.13369933196795 9.13303076733904 2469981.714215200 0.0647844296132708 30.0675751935533 10.5755492044083 60.0403077912577 5273252.35824707 T 365 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:45 2020-Aug-31 09:32
2057-Jan-28 14:56 < 00:01 Earth 0.256993365671923 0.256992823675718 0.256993907669254 13.0282292824972 13.0274334561444 2472392.122445610 0.0318038501108505 38.8422732578505 7.16194831801685 -46.9533436355222 3287150.45514132 T 365 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:45 2020-Aug-31 09:32
2057-Jun-08 07:02 < 00:01 Earth 0.315448314961624 0.31544794672911 0.315448683197437 8.49133555911532 8.4903407641429 2472522.792769208 0.080650826419886 55.9609763966921 4.9095064462243 71.4946046727442 12437671.2634253 T 365 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:45 2020-Aug-31 09:32
2064-Jan-28 06:58 < 00:01 Earth 0.198982409293036 0.198982156690395 0.198982661898528 9.50402294905768 9.50261391208121 2474947.790481614 0.0411034459021184 43.7065785552701 5.55657240491798 74.8815136242283 3903915.85421918 T 365 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:45 2020-Aug-31 09:32
2064-May-27 02:47 < 00:01 Earth 0.259580966478164 0.25958090055634 0.25958103240046 9.4348627952408 9.43377479506818 2475067.616103191 0.0616439639038957 52.2248155105548 3.09704754911298 -88.7905187666876 7320477.42672771 T 365 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:45 2020-Aug-31 09:32
2071-Jan-16 06:05 < 00:01 Earth 0.326326228162264 0.326325501358161 0.326326954970021 8.81154632237969 8.81061963961819 2477492.753259162 0.110476668382103 65.5885607133942 3.31867950659027 56.5669555565801 6215326.19634175 T 365 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:45 2020-Aug-31 09:32
2071-May-27 03:06 < 00:01 Earth 0.352752079446341 0.352751399597478 0.352752759297169 13.5848547224994 13.5842986944972 2477623.628859030 0.0503557270882841 53.8450010140852 3.99982195607815 -51.178342566148 8204428.54367411 T 365 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:45 2020-Aug-31 09:32
2077-Dec-29 10:51 < 00:01 Earth 0.483067572541014 0.483066815744321 0.483068329339162 9.30220097627449 9.30160800644664 2480031.951808185 0.134370825915486 56.6796212873999 5.00172642892074 48.5077348029714 6129389.52332135 T 365 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:45 2020-Aug-31 09:32
2094-Jun-29 19:01 < 00:01 Earth 0.480156021309466 0.480155250922685 0.480156791697258 9.39274203784517 9.39215122321468 2486058.292535323 0.136012208054006 53.4638803805906 13.8476613248391 46.0620909344092 3539244.62843422 T 365 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:45 2020-Aug-31 09:32
2101-Jan-28 15:18 < 00:01 Earth 0.318692198096186 0.3186909125203 0.318693483674807 14.7921646425381 14.7915994225774 2488462.137719790 0.0556693486032831 79.3657451640907 7.35861163746683 -36.3096112855776 3222060.13008793 T 365 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:45 2020-Aug-31 09:32
2101-Jun-15 01:27 < 00:01 Earth 0.354401600758408 0.354400781236833 0.354402420288969 8.63411290969784 8.63324210480727 2488599.560520298 0.15941045914488 99.0927377551443 6.73907045051022 65.9406879849254 9897191.87752157 T 365 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:45 2020-Aug-31 09:32
2108-Jan-31 00:44 < 00:01 Earth 0.194538243151619 0.194538000156367 0.194538486156061 10.4159849473939 10.4146699210912 2491020.530274462 0.0331132186947208 79.6634866458116 6.43675826639146 -82.5754916633133 3600555.18453119 T 365 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:45 2020-Aug-31 09:32
2108-May-31 15:57 < 00:01 Earth 0.263426195736869 0.263425862541482 0.263426528950435 8.77450165166757 8.77334883707064 2491142.164460829 0.126012177179006 112.442025228985 3.19893688726048 81.6573035604198 8836390.54420158 T 365 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:45 2020-Aug-31 09:32
2115-Jan-22 23:31 < 00:01 Earth 0.269709418836315 0.269708279687497 0.269710557995957 8.81641484810032 8.81529424498003 2493569.480024755 0.15241569166754 102.53884901784 3.6232356742997 56.4121220833644 5383243.06103032 T 365 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:45 2020-Aug-31 09:32
2115-May-27 11:21 < 00:01 Earth 0.300980738689389 0.300979861302235 0.300981616085765 11.7644121639077 11.7636596451815 2493693.972990381 0.0459929775526589 94.1196584380034 3.58028634244517 -62.3822548397057 7936747.45068459 T 365 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:45 2020-Aug-31 09:32
2122-Jan-06 04:20 < 00:01 Earth 0.42655384707855 0.426552537325584 0.42655515683867 9.11961445522868 9.11892947454343 2496109.680220911 0.216182874845535 109.040211399236 4.52526776126415 53.2704709095524 6040192.8573033 T 365 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:45 2020-Aug-31 09:32
2122-Jun-01 02:15 < 00:01 Earth 0.464155346982866 0.464153736808889 0.464156957159983 17.2113518906188 17.2110183580694 2496255.593834485 0.0953401237663698 100.359978612854 4.5128101288966 -36.9111753321495 8016625.84853296 T 365 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:45 2020-Aug-31 09:32
2145-Jan-26 21:35 < 00:01 Earth 0.394455409783146 0.394453357440965 0.394457462128511 16.8913865542188 16.8909866515703 2504531.399384916 0.0927274863572216 116.613373946646 7.49813831228335 -28.711764048594 3209641.30882645 T 365 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:45 2020-Aug-31 09:32
2145-Jun-21 05:29 < 00:01 Earth 0.400625914302066 0.400624671154156 0.400627157459062 8.90746447724852 8.90671779225562 2504676.728201042 0.221971008836931 114.452387230606 9.46853720081788 57.5143014677735 6038110.42053402 T 365 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:45 2020-Aug-31 09:32
2152-Jan-31 11:45 < 00:01 Earth 0.222898841552517 0.222897675911519 0.222900007210986 11.8122610743223 11.8112490519512 2507091.989237668 0.0325333842137073 114.903145876575 6.95694143304706 -59.7949180609595 3407415.94997399 T 365 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:45 2020-Aug-31 09:32
2152-Jun-05 17:41 < 00:01 Earth 0.287550899956483 0.287549994680283 0.287551805272909 8.50299154770782 8.5019017303755 2507218.236630298 0.209740596947435 176.152197357037 3.94484980124799 75.2049133950367 12266662.873534 T 365 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:45 2020-Aug-31 09:32
2159-Jan-27 13:33 < 00:01 Earth 0.221680823760249 0.221679741083053 0.221681906459219 9.08723590900644 9.08591313991834 2509645.064401178 0.139275115044757 122.525751281746 4.77542757347769 63.9418411531577 4330891.6157246 T 365 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:45 2020-Aug-31 09:32
2159-May-28 09:48 < 00:01 Earth 0.265226088638243 0.265225529455241 0.26522664784585 10.228570025903 10.227587821118 2509765.908099657 0.0721414142696863 131.197181845519 3.14488929930992 -77.8084910704257 7572200.03324703 T 365 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:45 2020-Aug-31 09:32
2166-Jan-13 07:14 < 00:01 Earth 0.36477620238647 0.364774490711433 0.364777914079921 8.90866378455744 8.9078438234051 2512187.801647661 0.271881476938367 154.996734329407 3.74331104670018 56.6118107812953 6149315.90645756 T 365 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:45 2020-Aug-31 09:32
2166-May-29 23:04 < 00:01 Earth 0.390268834363474 0.390266983112255 0.390270685622769 14.9504819270122 14.9500252597004 2512324.461295827 0.0943169710781295 127.953647903193 4.12179414681757 -43.8557436708168 8256649.5939924 T 365 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:45 2020-Aug-31 09:32
2189-Jan-24 12:26 < 00:01 Earth 0.479208652455263 0.47920614274949 0.47921116216346 19.2600391851757 19.2597504938105 2520600.018271194 0.123601093218821 136.208751250886 7.58788730118688 -23.2894580399272 3223734.50269043 T 365 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:45 2020-Aug-31 09:32
2189-Jun-27 15:12 < 00:01 Earth 0.451172104007823 0.451170655546681 0.451173552474351 9.19503426468161 9.19439197353772 2520754.133062687 0.253565585868957 107.08248518926 12.7052794170729 48.0338274713036 3903742.76993157 T 365 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:45 2020-Aug-31 09:32
2196-Jan-30 22:05 < 00:01 Earth 0.280813240797588 0.280811292555664 0.280815189051435 13.6201804034401 13.6194837399964 2523162.420218891 0.066501716108893 133.425795519656 7.26269735913216 -43.3542094080776 3299569.65783555 T 365 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:45 2020-Aug-31 09:32
2196-Jun-11 20:35 < 00:01 Earth 0.326933059887509 0.326931738039699 0.326934381773807 8.52440954653591 8.52345342397221 2523295.357554469 0.262201303268435 189.372584322241 5.53052959188293 69.6969825134365 12927268.0180535 T 365 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:45 2020-Aug-31 09:32
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