******************************************************************************* JPL/HORIZONS 2P/Encke 2024-Apr-24 04:36:09 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 Wed Apr 24 04:36:09 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.240423.p240717 EOP coverage : DATA-BASED 1962-JAN-20 TO 2024-APR-23. PREDICTS-> 2024-JUL-16 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 ************************************************** $$SOE 2023-Oct-15 00:00 0.394805392252 -22.9001942 2023-Oct-15 03:00 0.393161110986 -22.6559625 2023-Oct-15 06:00 0.391534633421 -22.4069300 2023-Oct-15 09:00 0.389926307562 -22.1530559 2023-Oct-15 12:00 0.388336484291 -21.8943013 2023-Oct-15 15:00 0.386765517216 -21.6306297 2023-Oct-15 18:00 0.385213762502 -21.3620067 2023-Oct-15 21:00 0.383681578694 -21.0884007 2023-Oct-16 00:00 0.382169326527 -20.8097826 2023-Oct-16 03:00 0.380677368727 -20.5261265 2023-Oct-16 06:00 0.379206069802 -20.2374090 2023-Oct-16 09:00 0.377755795819 -19.9436102 2023-Oct-16 12:00 0.376326914169 -19.6447135 2023-Oct-16 15:00 0.374919793326 -19.3407054 2023-Oct-16 18:00 0.373534802587 -19.0315766 2023-Oct-16 21:00 0.372172311806 -18.7173211 2023-Oct-17 00:00 0.370832691117 -18.3979371 2023-Oct-17 03:00 0.369516310639 -18.0734269 2023-Oct-17 06:00 0.368223540179 -17.7437969 2023-Oct-17 09:00 0.366954748917 -17.4090580 2023-Oct-17 12:00 0.365710305085 -17.0692257 2023-Oct-17 15:00 0.364490575630 -16.7243201 2023-Oct-17 18:00 0.363295925874 -16.3743662 2023-Oct-17 21:00 0.362126719159 -16.0193939 2023-Oct-18 00:00 0.360983316483 -15.6594382 2023-Oct-18 03:00 0.359866076131 -15.2945394 2023-Oct-18 06:00 0.358775353292 -14.9247430 2023-Oct-18 09:00 0.357711499677 -14.5500999 2023-Oct-18 12:00 0.356674863116 -14.1706666 2023-Oct-18 15:00 0.355665787166 -13.7865053 2023-Oct-18 18:00 0.354684610699 -13.3976835 2023-Oct-18 21:00 0.353731667496 -13.0042748 2023-Oct-19 00:00 0.352807285825 -12.6063583 2023-Oct-19 03:00 0.351911788033 -12.2040191 2023-Oct-19 06:00 0.351045490120 -11.7973480 2023-Oct-19 09:00 0.350208701319 -11.3864416 2023-Oct-19 12:00 0.349401723680 -10.9714025 2023-Oct-19 15:00 0.348624851651 -10.5523387 2023-Oct-19 18:00 0.347878371658 -10.1293643 2023-Oct-19 21:00 0.347162561696 -9.7025991 2023-Oct-20 00:00 0.346477690922 -9.2721681 2023-Oct-20 03:00 0.345824019254 -8.8382022 2023-Oct-20 06:00 0.345201796974 -8.4008375 2023-Oct-20 09:00 0.344611264349 -7.9602155 2023-Oct-20 12:00 0.344052651249 -7.5164827 2023-Oct-20 15:00 0.343526176789 -7.0697907 2023-Oct-20 18:00 0.343032048974 -6.6202956 2023-Oct-20 21:00 0.342570464362 -6.1681585 2023-Oct-21 00:00 0.342141607744 -5.7135444 2023-Oct-21 03:00 0.341745651830 -5.2566229 2023-Oct-21 06:00 0.341382756967 -4.7975670 2023-Oct-21 09:00 0.341053070863 -4.3365538 2023-Oct-21 12:00 0.340756728335 -3.8737634 2023-Oct-21 15:00 0.340493851077 -3.4093793 2023-Oct-21 18:00 0.340264547451 -2.9435874 2023-Oct-21 21:00 0.340068912295 -2.4765764 2023-Oct-22 00:00 0.339907026759 -2.0085369 2023-Oct-22 03:00 0.339778958158 -1.5396614 2023-Oct-22 06:00 0.339684759859 -1.0701441 2023-Oct-22 09:00 0.339624471180 -0.6001799 2023-Oct-22 12:00 0.339598117324 -0.1299649 2023-Oct-22 15:00 0.339605709331 0.3403046 2023-Oct-22 18:00 0.339647244063 0.8104321 2023-Oct-22 21:00 0.339722704203 1.2802213 2023-Oct-23 00:00 0.339832058291 1.7494767 2023-Oct-23 03:00 0.339975260779 2.2180034 2023-Oct-23 06:00 0.340152252110 2.6856083 2023-Oct-23 09:00 0.340362958824 3.1520994 2023-Oct-23 12:00 0.340607293692 3.6172871 2023-Oct-23 15:00 0.340885155862 4.0809838 2023-Oct-23 18:00 0.341196431043 4.5430046 2023-Oct-23 21:00 0.341540991699 5.0031675 2023-Oct-24 00:00 0.341918697270 5.4612938 2023-Oct-24 03:00 0.342329394416 5.9172081 2023-Oct-24 06:00 0.342772917274 6.3707388 2023-Oct-24 09:00 0.343249087741 6.8217185 2023-Oct-24 12:00 0.343757715771 7.2699837 2023-Oct-24 15:00 0.344298599686 7.7153757 2023-Oct-24 18:00 0.344871526511 8.1577403 2023-Oct-24 21:00 0.345476272311 8.5969280 2023-Oct-25 00:00 0.346112602557 9.0327947 2023-Oct-25 03:00 0.346780272486 9.4652012 2023-Oct-25 06:00 0.347479027487 9.8940138 2023-Oct-25 09:00 0.348208603488 10.3191041 2023-Oct-25 12:00 0.348968727350 10.7403493 2023-Oct-25 15:00 0.349759117277 11.1576323 2023-Oct-25 18:00 0.350579483220 11.5708418 2023-Oct-25 21:00 0.351429527294 11.9798719 2023-Oct-26 00:00 0.352308944196 12.3846228 2023-Oct-26 03:00 0.353217421620 12.7850005 2023-Oct-26 06:00 0.354154640682 13.1809168 2023-Oct-26 09:00 0.355120276336 13.5722892 2023-Oct-26 12:00 0.356113997794 13.9590410 2023-Oct-26 15:00 0.357135468946 14.3411014 2023-Oct-26 18:00 0.358184348766 14.7184053 2023-Oct-26 21:00 0.359260291726 15.0908929 2023-Oct-27 00:00 0.360362948198 15.4585104 2023-Oct-27 03:00 0.361491964853 15.8212091 2023-Oct-27 06:00 0.362646985052 16.1789460 2023-Oct-27 09:00 0.363827649231 16.5316831 2023-Oct-27 12:00 0.365033595276 16.8793877 2023-Oct-27 15:00 0.366264458889 17.2220321 2023-Oct-27 18:00 0.367519873953 17.5595935 2023-Oct-27 21:00 0.368799472875 17.8920538 2023-Oct-28 00:00 0.370102886927 18.2193997 2023-Oct-28 03:00 0.371429746578 18.5416222 2023-Oct-28 06:00 0.372779681807 18.8587169 2023-Oct-28 09:00 0.374152322418 19.1706832 2023-Oct-28 12:00 0.375547298328 19.4775248 2023-Oct-28 15:00 0.376964239860 19.7792493 2023-Oct-28 18:00 0.378402778011 20.0758678 2023-Oct-28 21:00 0.379862544721 20.3673952 2023-Oct-29 00:00 0.381343173116 20.6538497 2023-Oct-29 03:00 0.382844297757 20.9352526 2023-Oct-29 06:00 0.384365554860 21.2116286 2023-Oct-29 09:00 0.385906582518 21.4830050 2023-Oct-29 12:00 0.387467020907 21.7494120 2023-Oct-29 15:00 0.389046512475 22.0108826 2023-Oct-29 18:00 0.390644702133 22.2674520 2023-Oct-29 21:00 0.392261237424 22.5191578 2023-Oct-30 00:00 0.393895768686 22.7660398 2023-Oct-30 03:00 0.395547949201 23.0081399 2023-Oct-30 06:00 0.397217435343 23.2455018 2023-Oct-30 09:00 0.398903886706 23.4781710 2023-Oct-30 12:00 0.400606966224 23.7061946 2023-Oct-30 15:00 0.402326340291 23.9296213 2023-Oct-30 18:00 0.404061678857 24.1485009 2023-Oct-30 21:00 0.405812655527 24.3628849 2023-Oct-31 00:00 0.407578947650 24.5728255 $$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 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'