******************************************************************************* JPL/HORIZONS 2P/Encke 2024-May-02 03:03:57 Rec #:90000090 (+COV) Soln.date: 2024-Mar-14_10:21:20 # obs: 3226 (2009-2023) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2457762.5 ! 2017-Jan-09.0000000 (TDB) RMSW= n.a. EC= .8483341107490974 QR= .3359006134483105 TP= 2457822.5925240088 OM= 334.5600106702298 W= 186.5627807890908 IN= 11.77822100930731 A= 2.214740671797508 MA= 342.0303260229011 ADIST= 4.093580730146705 PER= 3.2960403829599 N= .299033437 ANGMOM= .0135543 DAN= 3.94885 DDN= .33691 L= 160.9857804 B= -1.3368147 MOID= .172842 TP= 2017-Mar-10.0925240088 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= 2.4 M1= 15.5 M2= n.a. k1= 4.5 k2= n.a. PHCOF= n.a. COMET comments 1: soln ref.= JPL#K235/38, data arc: 2009-08-15 to 2023-10-13 2: k1=4.5; ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Thu May 2 03:03:57 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: 2P/Encke {source: JPL#K235/38} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2023-Oct-15 00:00:00.0000 UT Stop time : A.D. 2023-Oct-31 00:00:00.0000 UT Step-size : 180 minutes ******************************************************************************* Target pole/equ : undefined Target radii : 2.4 km Center geodetic : 0.0, 0.0, -6378.137 {E-lon(deg),Lat(deg),Alt(km)} Center cylindric: 0.0, 0.0, 0.0 {E-lon(deg),Dxy(km),Dz(km)} Center pole/equ : ITRF93 {East-longitude positive} Center radii : 6378.137, 6378.137, 6356.752 km {Equator_a, b, pole_c} Target primary : Sun Vis. interferer : MOON (R_eq= 1737.400) km {source: DE441} Rel. light bend : Sun {source: DE441} Rel. lght bnd GM: 1.3271E+11 km^3/s^2 Small-body perts: Yes {source: SB441-N16} Atmos refraction: NO (AIRLESS) RA format : HMS Time format : CAL Calendar mode : Mixed Julian/Gregorian EOP file : eop.240501.p240725 EOP coverage : DATA-BASED 1962-JAN-20 TO 2024-MAY-01. PREDICTS-> 2024-JUL-24 Units conversion: 1 au= 149597870.700 km, c= 299792.458 km/s, 1 day= 86400.0 s Table cut-offs 1: Elevation (-90.0deg=NO ),Airmass (>38.000=NO), Daylight (NO ) Table cut-offs 2: Solar elongation ( 0.0,180.0=NO ),Local Hour Angle( 0.0=NO ) Table cut-offs 3: RA/DEC angular rate ( 0.0=NO ) ******************************************************************************* Initial IAU76/J2000 heliocentric ecliptic osculating elements (au, days, deg.): EPOCH= 2457762.5 ! 2017-Jan-09.0000000 (TDB) RMSW= n.a. EC= .8483341107490974 QR= .3359006134483105 TP= 2457822.5925240088 OM= 334.5600106702298 W= 186.5627807890908 IN= 11.77822100930731 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X= 1.052466522684031E+00 Y= 5.441180775445954E-01 Z= 4.803191988130648E-01 VX=-1.807096193311414E-02 VY= 1.280245411011866E-03 VZ=-1.054140721972123E-03 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= 2.4 M1= 15.5 M2= n.a. k1= 4.5 k2= n.a. PHCOF= n.a. ******************************************************************************* Date__(UT)__HR:MN r rdot VmagSn VmagOb *************************************************************************** $$SOE 2023-Oct-15 00:00 0.394805392252 -22.9001942 63.9855173 80.7022518 2023-Oct-15 03:00 0.393161110986 -22.6559625 64.1322170 80.9242481 2023-Oct-15 06:00 0.391534633421 -22.4069300 64.2782070 81.1465059 2023-Oct-15 09:00 0.389926307562 -22.1530559 64.4234359 81.3689691 2023-Oct-15 12:00 0.388336484291 -21.8943013 64.5678514 81.5915796 2023-Oct-15 15:00 0.386765517216 -21.6306297 64.7113998 81.8142776 2023-Oct-15 18:00 0.385213762502 -21.3620067 64.8540264 82.0370015 2023-Oct-15 21:00 0.383681578694 -21.0884007 64.9956753 82.2596878 2023-Oct-16 00:00 0.382169326527 -20.8097826 65.1362896 82.4822713 2023-Oct-16 03:00 0.380677368727 -20.5261265 65.2758114 82.7046849 2023-Oct-16 06:00 0.379206069802 -20.2374090 65.4141815 82.9268598 2023-Oct-16 09:00 0.377755795819 -19.9436102 65.5513400 83.1487254 2023-Oct-16 12:00 0.376326914169 -19.6447135 65.6872260 83.3702093 2023-Oct-16 15:00 0.374919793326 -19.3407054 65.8217775 83.5912376 2023-Oct-16 18:00 0.373534802587 -19.0315766 65.9549318 83.8117346 2023-Oct-16 21:00 0.372172311806 -18.7173211 66.0866252 84.0316228 2023-Oct-17 00:00 0.370832691117 -18.3979371 66.2167934 84.2508233 2023-Oct-17 03:00 0.369516310639 -18.0734269 66.3453714 84.4692557 2023-Oct-17 06:00 0.368223540179 -17.7437969 66.4722934 84.6868379 2023-Oct-17 09:00 0.366954748917 -17.4090580 66.5974931 84.9034866 2023-Oct-17 12:00 0.365710305085 -17.0692257 66.7209035 85.1191170 2023-Oct-17 15:00 0.364490575630 -16.7243201 66.8424575 85.3336429 2023-Oct-17 18:00 0.363295925874 -16.3743662 66.9620873 85.5469770 2023-Oct-17 21:00 0.362126719159 -16.0193939 67.0797250 85.7590309 2023-Oct-18 00:00 0.360983316483 -15.6594382 67.1953024 85.9697152 2023-Oct-18 03:00 0.359866076131 -15.2945394 67.3087512 86.1789392 2023-Oct-18 06:00 0.358775353292 -14.9247430 67.4200031 86.3866118 2023-Oct-18 09:00 0.357711499677 -14.5500999 67.5289898 86.5926407 2023-Oct-18 12:00 0.356674863116 -14.1706666 67.6356432 86.7969334 2023-Oct-18 15:00 0.355665787166 -13.7865053 67.7398956 86.9993965 2023-Oct-18 18:00 0.354684610699 -13.3976835 67.8416795 87.1999363 2023-Oct-18 21:00 0.353731667496 -13.0042748 67.9409279 87.3984590 2023-Oct-19 00:00 0.352807285825 -12.6063583 68.0375745 87.5948705 2023-Oct-19 03:00 0.351911788033 -12.2040191 68.1315537 87.7890767 2023-Oct-19 06:00 0.351045490120 -11.7973480 68.2228006 87.9809835 2023-Oct-19 09:00 0.350208701319 -11.3864416 68.3112514 88.1704973 2023-Oct-19 12:00 0.349401723680 -10.9714025 68.3968433 88.3575249 2023-Oct-19 15:00 0.348624851651 -10.5523387 68.4795147 88.5419735 2023-Oct-19 18:00 0.347878371658 -10.1293643 68.5592052 88.7237511 2023-Oct-19 21:00 0.347162561696 -9.7025991 68.6358560 88.9027667 2023-Oct-20 00:00 0.346477690922 -9.2721681 68.7094097 89.0789303 2023-Oct-20 03:00 0.345824019254 -8.8382022 68.7798106 89.2521529 2023-Oct-20 06:00 0.345201796974 -8.4008375 68.8470049 89.4223471 2023-Oct-20 09:00 0.344611264349 -7.9602155 68.9109405 89.5894269 2023-Oct-20 12:00 0.344052651249 -7.5164827 68.9715675 89.7533080 2023-Oct-20 15:00 0.343526176789 -7.0697907 69.0288380 89.9139081 2023-Oct-20 18:00 0.343032048974 -6.6202956 69.0827063 90.0711466 2023-Oct-20 21:00 0.342570464362 -6.1681585 69.1331292 90.2249453 2023-Oct-21 00:00 0.342141607744 -5.7135444 69.1800658 90.3752282 2023-Oct-21 03:00 0.341745651830 -5.2566229 69.2234779 90.5219218 2023-Oct-21 06:00 0.341382756967 -4.7975670 69.2633296 90.6649551 2023-Oct-21 09:00 0.341053070863 -4.3365538 69.2995882 90.8042599 2023-Oct-21 12:00 0.340756728335 -3.8737634 69.3322233 90.9397711 2023-Oct-21 15:00 0.340493851077 -3.4093793 69.3612078 91.0714261 2023-Oct-21 18:00 0.340264547451 -2.9435874 69.3865172 91.1991659 2023-Oct-21 21:00 0.340068912295 -2.4765764 69.4081301 91.3229345 2023-Oct-22 00:00 0.339907026759 -2.0085369 69.4260284 91.4426793 2023-Oct-22 03:00 0.339778958158 -1.5396614 69.4401967 91.5583512 2023-Oct-22 06:00 0.339684759859 -1.0701441 69.4506230 91.6699046 2023-Oct-22 09:00 0.339624471180 -0.6001799 69.4572983 91.7772975 2023-Oct-22 12:00 0.339598117324 -0.1299649 69.4602171 91.8804916 2023-Oct-22 15:00 0.339605709331 0.3403046 69.4593768 91.9794524 2023-Oct-22 18:00 0.339647244063 0.8104321 69.4547780 92.0741492 2023-Oct-22 21:00 0.339722704203 1.2802213 69.4464248 92.1645551 2023-Oct-23 00:00 0.339832058291 1.7494767 69.4343243 92.2506472 2023-Oct-23 03:00 0.339975260779 2.2180034 69.4184867 92.3324064 2023-Oct-23 06:00 0.340152252110 2.6856083 69.3989256 92.4098177 2023-Oct-23 09:00 0.340362958824 3.1520994 69.3756575 92.4828698 2023-Oct-23 12:00 0.340607293692 3.6172871 69.3487022 92.5515555 2023-Oct-23 15:00 0.340885155862 4.0809838 69.3180822 92.6158714 2023-Oct-23 18:00 0.341196431043 4.5430046 69.2838233 92.6758181 2023-Oct-23 21:00 0.341540991699 5.0031675 69.2459542 92.7313999 2023-Oct-24 00:00 0.341918697270 5.4612938 69.2045061 92.7826251 2023-Oct-24 03:00 0.342329394416 5.9172081 69.1595133 92.8295056 2023-Oct-24 06:00 0.342772917274 6.3707388 69.1110126 92.8720570 2023-Oct-24 09:00 0.343249087741 6.8217185 69.0590436 92.9102984 2023-Oct-24 12:00 0.343757715771 7.2699837 69.0036481 92.9442526 2023-Oct-24 15:00 0.344298599686 7.7153757 68.9448705 92.9739458 2023-Oct-24 18:00 0.344871526511 8.1577403 68.8827574 92.9994075 2023-Oct-24 21:00 0.345476272311 8.5969280 68.8173577 93.0206705 2023-Oct-25 00:00 0.346112602557 9.0327947 68.7487223 93.0377706 2023-Oct-25 03:00 0.346780272486 9.4652012 68.6769039 93.0507467 2023-Oct-25 06:00 0.347479027487 9.8940138 68.6019574 93.0596407 2023-Oct-25 09:00 0.348208603488 10.3191041 68.5239391 93.0644971 2023-Oct-25 12:00 0.348968727350 10.7403493 68.4429072 93.0653632 2023-Oct-25 15:00 0.349759117277 11.1576323 68.3589211 93.0622888 2023-Oct-25 18:00 0.350579483220 11.5708418 68.2720418 93.0553258 2023-Oct-25 21:00 0.351429527294 11.9798719 68.1823314 93.0445289 2023-Oct-26 00:00 0.352308944196 12.3846228 68.0898532 93.0299544 2023-Oct-26 03:00 0.353217421620 12.7850005 67.9946715 93.0116609 2023-Oct-26 06:00 0.354154640682 13.1809168 67.8968515 92.9897087 2023-Oct-26 09:00 0.355120276336 13.5722892 67.7964593 92.9641599 2023-Oct-26 12:00 0.356113997794 13.9590410 67.6935613 92.9350780 2023-Oct-26 15:00 0.357135468946 14.3411014 67.5882249 92.9025281 2023-Oct-26 18:00 0.358184348766 14.7184053 67.4805175 92.8665765 2023-Oct-26 21:00 0.359260291726 15.0908929 67.3705073 92.8272907 2023-Oct-27 00:00 0.360362948198 15.4585104 67.2582623 92.7847392 2023-Oct-27 03:00 0.361491964853 15.8212091 67.1438508 92.7389914 2023-Oct-27 06:00 0.362646985052 16.1789460 67.0273412 92.6901175 2023-Oct-27 09:00 0.363827649231 16.5316831 66.9088018 92.6381884 2023-Oct-27 12:00 0.365033595276 16.8793877 66.7883005 92.5832753 2023-Oct-27 15:00 0.366264458889 17.2220321 66.6659054 92.5254502 2023-Oct-27 18:00 0.367519873953 17.5595935 66.5416838 92.4647850 2023-Oct-27 21:00 0.368799472875 17.8920538 66.4157030 92.4013520 2023-Oct-28 00:00 0.370102886927 18.2193997 66.2880295 92.3352235 2023-Oct-28 03:00 0.371429746578 18.5416222 66.1587294 92.2664720 2023-Oct-28 06:00 0.372779681807 18.8587169 66.0278682 92.1951696 2023-Oct-28 09:00 0.374152322418 19.1706832 65.8955107 92.1213883 2023-Oct-28 12:00 0.375547298328 19.4775248 65.7617208 92.0451999 2023-Oct-28 15:00 0.376964239860 19.7792493 65.6265619 91.9666758 2023-Oct-28 18:00 0.378402778011 20.0758678 65.4900962 91.8858868 2023-Oct-28 21:00 0.379862544721 20.3673952 65.3523853 91.8029033 2023-Oct-29 00:00 0.381343173116 20.6538497 65.2134898 91.7177951 2023-Oct-29 03:00 0.382844297757 20.9352526 65.0734691 91.6306314 2023-Oct-29 06:00 0.384365554860 21.2116286 64.9323820 91.5414806 2023-Oct-29 09:00 0.385906582518 21.4830050 64.7902858 91.4504102 2023-Oct-29 12:00 0.387467020907 21.7494120 64.6472371 91.3574871 2023-Oct-29 15:00 0.389046512475 22.0108826 64.5032912 91.2627772 2023-Oct-29 18:00 0.390644702133 22.2674520 64.3585024 91.1663456 2023-Oct-29 21:00 0.392261237424 22.5191578 64.2129237 91.0682562 2023-Oct-30 00:00 0.393895768686 22.7660398 64.0666071 90.9685722 2023-Oct-30 03:00 0.395547949201 23.0081399 63.9196034 90.8673555 2023-Oct-30 06:00 0.397217435343 23.2455018 63.7719621 90.7646672 2023-Oct-30 09:00 0.398903886706 23.4781710 63.6237319 90.6605670 2023-Oct-30 12:00 0.400606966224 23.7061946 63.4749597 90.5551139 2023-Oct-30 15:00 0.402326340291 23.9296213 63.3256918 90.4483654 2023-Oct-30 18:00 0.404061678857 24.1485009 63.1759730 90.3403780 2023-Oct-30 21:00 0.405812655527 24.3628849 63.0258470 90.2312072 2023-Oct-31 00:00 0.407578947650 24.5728255 62.8753563 90.1209070 $$EOE ******************************************************************************* Column meaning: TIME Times PRIOR to 1962 are UT1, a mean-solar time closely related to the prior but now-deprecated GMT. Times AFTER 1962 are in UTC, the current civil or "wall-clock" time-scale. UTC is kept within 0.9 seconds of UT1 using integer leap-seconds for 1972 and later years. Conversion from the internal Barycentric Dynamical Time (TDB) of solar system dynamics to the non-uniform civil UT time-scale requested for output has not been determined for UTC times after the next July or January 1st. Therefore, the last known leap-second is used as a constant over future intervals. Time tags refer to the UT time-scale conversion from TDB on Earth regardless of observer location within the solar system, although clock rates may differ due to the local gravity field and no analog to "UT" may be defined for that location. Any 'b' symbol in the 1st-column denotes a B.C. date. First-column blank (" ") denotes an A.D. date. CALENDAR SYSTEM Mixed calendar mode was active such that calendar dates after AD 1582-Oct-15 (if any) are in the modern Gregorian system. Dates prior to 1582-Oct-5 (if any) are in the Julian calendar system, which is automatically extended for dates prior to its adoption on 45-Jan-1 BC. The Julian calendar is useful for matching historical dates. The Gregorian calendar more accurately corresponds to the Earth's orbital motion and seasons. A "Gregorian-only" calendar mode is available if such physical events are the primary interest. NOTE: "n.a." in output means quantity "not available" at the print-time. 'r rdot' = The Sun's apparent range ("r", light-time aberrated) and range-rate ("rdot") relative to the target center, as seen by the observer. A positive "rdot" means the target center was moving away from the Sun, negative means moving toward the Sun. Units: AU and KM/S 'VmagSn VmagOb' = Magnitude of target centers' velocity with respect to the Sun ("VmagSn") and the observer ("VmagOb") at the time light left the target center to be observed (print time minus down-leg light-time). These are absolute values of the velocity vectors (total speeds) and do NOT indicate direction of motion. Units: KM/S Computations by ... Solar System Dynamics Group, Horizons On-Line Ephemeris System 4800 Oak Grove Drive, Jet Propulsion Laboratory Pasadena, CA 91109 USA General site: https://ssd.jpl.nasa.gov/ Mailing list: https://ssd.jpl.nasa.gov/email_list.html System news : https://ssd.jpl.nasa.gov/horizons/news.html User Guide : https://ssd.jpl.nasa.gov/horizons/manual.html Connect : browser https://ssd.jpl.nasa.gov/horizons/app.html#/x API https://ssd-api.jpl.nasa.gov/doc/horizons.html command-line telnet ssd.jpl.nasa.gov 6775 e-mail/batch https://ssd.jpl.nasa.gov/ftp/ssd/hrzn_batch.txt scripts https://ssd.jpl.nasa.gov/ftp/ssd/SCRIPTS Author : Jon.D.Giorgini@jpl.nasa.gov ******************************************************************************* !$$SOF COMMAND = '90000090' START_TIME = '2023-10-15' STOP_TIME = '2023-10-31' STEP_SIZE = '3 hours' QUANTITIES = '19,22'