******************************************************************************* JPL/HORIZONS 2P/Encke 2025-Dec-12 21:15:35 Rec #:90000090 (+COV) Soln.date: 2022-May-23_10:10:06 # obs: 2782 (2009-2021) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2457296.5 ! 2015-Oct-01.0000000 (TDB) RMSW= n.a. EC= .8483394559339036 QR= .3359495103819352 TP= 2457822.5366838882 OM= 334.56778623714 W= 186.5472784858309 IN= 11.78141800304278 A= 2.215141139382451 MA= 202.7400978995909 ADIST= 4.094332768382967 PER= 3.2969344043337 N= .298952349 ANGMOM= .013555306 DAN= 3.95022 DDN= .33696 L= 160.9782979 B= -1.3340271 MOID= .172932 TP= 2017-Mar-10.0366838882 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= 2.4 M1= 15.6 M2= n.a. k1= 4.5 k2= n.a. PHCOF= n.a. COMET comments 1: soln ref.= JPL#K204/20, data arc: 2009-08-15 to 2021-10-02 2: k1=4.5; ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Fri Dec 12 21:15:35 2025 Pasadena, USA / Horizons ******************************************************************************* Target body name: 2P/Encke {source: JPL#K204/20} 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.251212.p260310 EOP coverage : DATA-BASED 1962-JAN-20 TO 2025-DEC-12. PREDICTS-> 2026-MAR-09 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= 2457296.5 ! 2015-Oct-01.0000000 (TDB) RMSW= n.a. EC= .8483394559339036 QR= .3359495103819352 TP= 2457822.5366838882 OM= 334.56778623714 W= 186.5472784858309 IN= 11.78141800304278 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X= 3.900206573317974E+00 Y=-1.053011744629009E+00 Z=-2.984979479743345E-01 VX=-2.486473275068281E-04 VY= 2.933777716075417E-03 VZ= 1.960374328118011E-03 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= 2.4 M1= 15.6 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 0.394812186472 -22.9012618 63.9849134 80.7011338 2023-Oct-15 03:00 0.393167827410 -22.6570503 64.1316163 80.9231297 2023-Oct-15 06:00 0.391541270581 -22.4080383 64.2776098 81.1453874 2023-Oct-15 09:00 0.389932863978 -22.1541848 64.4228425 81.3678508 2023-Oct-15 12:00 0.388342958474 -21.8954509 64.5672619 81.5904617 2023-Oct-15 15:00 0.386771907666 -21.6318001 64.7108145 81.8131604 2023-Oct-15 18:00 0.385220067710 -21.3631980 64.8534455 82.0358853 2023-Oct-15 21:00 0.383687797142 -21.0896131 64.9950991 82.2585729 2023-Oct-16 00:00 0.382175456688 -20.8110163 65.1357183 82.4811579 2023-Oct-16 03:00 0.380683409070 -20.5273814 65.2752452 82.7035734 2023-Oct-16 06:00 0.379212018788 -20.2386853 65.4136208 82.9257504 2023-Oct-16 09:00 0.377761651905 -19.9449079 65.5507850 83.1476185 2023-Oct-16 12:00 0.376332675808 -19.6460326 65.6866769 83.3691053 2023-Oct-16 15:00 0.374925458968 -19.3420460 65.8212346 83.5901367 2023-Oct-16 18:00 0.373540370681 -19.0329387 65.9543953 83.8106372 2023-Oct-16 21:00 0.372177780801 -18.7187047 66.0860955 84.0305292 2023-Oct-17 00:00 0.370838059461 -18.3993422 66.2162708 84.2497339 2023-Oct-17 03:00 0.369521576784 -18.0748534 66.3448561 84.4681709 2023-Oct-17 06:00 0.368228702579 -17.7452448 66.4717856 84.6857580 2023-Oct-17 09:00 0.366959806033 -17.4105272 66.5969931 84.9024120 2023-Oct-17 12:00 0.365715255381 -17.0707161 66.7204117 85.1180480 2023-Oct-17 15:00 0.364495417581 -16.7258316 66.8419741 85.3325799 2023-Oct-17 18:00 0.363300657962 -16.3758987 66.9616127 85.5459205 2023-Oct-17 21:00 0.362131339877 -16.0209471 67.0792594 85.7579813 2023-Oct-18 00:00 0.360987824337 -15.6610121 67.1948460 85.9686727 2023-Oct-18 03:00 0.359870469641 -15.2961336 67.3083044 86.1779043 2023-Oct-18 06:00 0.358779630993 -14.9263574 67.4195661 86.3855849 2023-Oct-18 09:00 0.357715660121 -14.5517342 67.5285630 86.5916223 2023-Oct-18 12:00 0.356678904874 -14.1723206 67.6352269 86.7959237 2023-Oct-18 15:00 0.355669708831 -13.7881786 67.7394899 86.9983960 2023-Oct-18 18:00 0.354688410885 -13.3993759 67.8412848 87.1989455 2023-Oct-18 21:00 0.353735344840 -13.0059858 67.9405445 87.3974783 2023-Oct-19 00:00 0.352810838993 -12.6080877 68.0372026 87.5939002 2023-Oct-19 03:00 0.351915215716 -12.2057664 68.1311936 87.7881172 2023-Oct-19 06:00 0.351048791039 -11.7991128 68.2224526 87.9800352 2023-Oct-19 09:00 0.350211874227 -11.3882235 68.3109158 88.1695607 2023-Oct-19 12:00 0.349404767363 -10.9732009 68.3965203 88.3566003 2023-Oct-19 15:00 0.348627764928 -10.5541533 68.4792045 88.5410614 2023-Oct-19 18:00 0.347881153385 -10.1311945 68.5589081 88.7228518 2023-Oct-19 21:00 0.347165210768 -9.7044442 68.6355722 88.9018807 2023-Oct-20 00:00 0.346480206275 -9.2740277 68.7091395 89.0780578 2023-Oct-20 03:00 0.345826399862 -8.8400757 68.7795542 89.2512944 2023-Oct-20 06:00 0.345204041858 -8.4027243 68.8467625 89.4215030 2023-Oct-20 09:00 0.344613372571 -7.9621150 68.9107123 89.5885975 2023-Oct-20 12:00 0.344054621920 -7.5183942 68.9713537 89.7524937 2023-Oct-20 15:00 0.343528009066 -7.0717135 69.0286387 89.9131092 2023-Oct-20 18:00 0.343033742065 -6.6222291 69.0825218 90.0703635 2023-Oct-20 21:00 0.342572017524 -6.1701019 69.1329597 90.2241782 2023-Oct-21 00:00 0.342143020284 -5.7154970 69.1799114 90.3744775 2023-Oct-21 03:00 0.341746923112 -5.2585839 69.2233387 90.5211878 2023-Oct-21 06:00 0.341383886406 -4.7995358 69.2632058 90.6642381 2023-Oct-21 09:00 0.341054057931 -4.3385295 69.2994799 90.8035602 2023-Oct-21 12:00 0.340757572558 -3.8757453 69.3321306 90.9390888 2023-Oct-21 15:00 0.340494552040 -3.4113665 69.3611308 91.0707616 2023-Oct-21 18:00 0.340265104795 -2.9455792 69.3864559 91.1985195 2023-Oct-21 21:00 0.340069325721 -2.4785719 69.4080848 91.3223063 2023-Oct-22 00:00 0.339907296026 -2.0105353 69.4259989 91.4420696 2023-Oct-22 03:00 0.339779083086 -1.5416620 69.4401832 91.5577601 2023-Oct-22 06:00 0.339684740325 -1.0721459 69.4506254 91.6693323 2023-Oct-22 09:00 0.339624307124 -0.6021821 69.4573168 91.7767442 2023-Oct-22 12:00 0.339597808745 -0.1319667 69.4602516 91.8799574 2023-Oct-22 15:00 0.339605256289 0.3383040 69.4594273 91.9789375 2023-Oct-22 18:00 0.339646646678 0.8084336 69.4548445 92.0736536 2023-Oct-22 21:00 0.339721962655 1.2782257 69.4465072 92.1640790 2023-Oct-23 00:00 0.339831172821 1.7474848 69.4344226 92.2501906 2023-Oct-23 03:00 0.339974231685 2.2160162 69.4186008 92.3319694 2023-Oct-23 06:00 0.340151079752 2.6836264 69.3990555 92.4094003 2023-Oct-23 09:00 0.340361643619 3.1501237 69.3758030 92.4824720 2023-Oct-23 12:00 0.340605836115 3.6153184 69.3488632 92.5511774 2023-Oct-23 15:00 0.340883556445 4.0790228 69.3182587 92.6155130 2023-Oct-23 18:00 0.341194690375 4.5410521 69.2840151 92.6754793 2023-Oct-23 21:00 0.341539110423 5.0012244 69.2461611 92.7310808 2023-Oct-24 00:00 0.341916676084 5.4593607 69.2047280 92.7823255 2023-Oct-24 03:00 0.342327234071 5.9152857 69.1597500 92.8292254 2023-Oct-24 06:00 0.342770618572 6.3688280 69.1112641 92.8717961 2023-Oct-24 09:00 0.343246651536 6.8198198 69.0593095 92.9100568 2023-Oct-24 12:00 0.343755142965 7.2680979 69.0039283 92.9440302 2023-Oct-24 15:00 0.344295891229 7.7135034 68.9451648 92.9737424 2023-Oct-24 18:00 0.344868683399 8.1558820 68.8830656 92.9992230 2023-Oct-24 21:00 0.345473295586 8.5950845 68.8176795 93.0205046 2023-Oct-25 00:00 0.346109493302 9.0309665 68.7490575 93.0376233 2023-Oct-25 03:00 0.346777031828 9.4633889 68.6772523 93.0506177 2023-Oct-25 06:00 0.347475656591 9.8922179 68.6023187 93.0595299 2023-Oct-25 09:00 0.348205103557 10.3173251 68.5243132 93.0644042 2023-Oct-25 12:00 0.348965099624 10.7385877 68.4432936 93.0652880 2023-Oct-25 15:00 0.349755363031 11.1558887 68.3593197 93.0622310 2023-Oct-25 18:00 0.350575603761 11.5691164 68.2724522 93.0552853 2023-Oct-25 21:00 0.351425523961 11.9781653 68.1827534 93.0445054 2023-Oct-26 00:00 0.352304818356 12.3829353 68.0902866 93.0299476 2023-Oct-26 03:00 0.353213174668 12.7833326 67.9951159 93.0116706 2023-Oct-26 06:00 0.354150274038 13.1792687 67.8973067 92.9897346 2023-Oct-26 09:00 0.355115791444 13.5706612 67.7969249 92.9642016 2023-Oct-26 12:00 0.356109396122 13.9574335 67.6940372 92.9351353 2023-Oct-26 15:00 0.357130751980 14.3395147 67.5887106 92.9026007 2023-Oct-26 18:00 0.358179518010 14.7168395 67.4810129 92.8666641 2023-Oct-26 21:00 0.359255348702 15.0893483 67.3710119 92.8273930 2023-Oct-27 00:00 0.360357894444 15.4569872 67.2587759 92.7848559 2023-Oct-27 03:00 0.361486801919 15.8197075 67.1443732 92.7391222 2023-Oct-27 06:00 0.362641714500 16.1774661 67.0278720 92.6902621 2023-Oct-27 09:00 0.363822272632 16.5302250 66.9093406 92.6383465 2023-Oct-27 12:00 0.365028114210 16.8779516 66.7888472 92.5834466 2023-Oct-27 15:00 0.366258874945 17.2206180 66.6664596 92.5256342 2023-Oct-27 18:00 0.367514188723 17.5582015 66.5422453 92.4649815 2023-Oct-27 21:00 0.368793687957 17.8906839 66.4162714 92.4015607 2023-Oct-28 00:00 0.370097003920 18.2180520 66.2886046 92.3354441 2023-Oct-28 03:00 0.371423767083 18.5402967 66.1593109 92.2667041 2023-Oct-28 06:00 0.372773607425 18.8574135 66.0284559 92.1954130 2023-Oct-28 09:00 0.374146154748 19.1694020 65.8961042 92.1216426 2023-Oct-28 12:00 0.375541038968 19.4762657 65.7623199 92.0454648 2023-Oct-28 15:00 0.376957890403 19.7780122 65.6271662 91.9669509 2023-Oct-28 18:00 0.378396340046 20.0746527 65.4907056 91.8861719 2023-Oct-28 21:00 0.379856019829 20.3662020 65.3529995 91.8031981 2023-Oct-29 00:00 0.381336562875 20.6526783 65.2141085 91.7180993 2023-Oct-29 03:00 0.382837603734 20.9341029 65.0740921 91.6309446 2023-Oct-29 06:00 0.384358778614 21.2105003 64.9330090 91.5418025 2023-Oct-29 09:00 0.385899725599 21.4818981 64.7909166 91.4507405 2023-Oct-29 12:00 0.387460084854 21.7483265 64.6478715 91.3578256 2023-Oct-29 15:00 0.389039498816 22.0098181 64.5039289 91.2631236 2023-Oct-29 18:00 0.390637612384 22.2664084 64.3591431 91.1666996 2023-Oct-29 21:00 0.392254073087 22.5181349 64.2135673 91.0686175 2023-Oct-30 00:00 0.393888531251 22.7650375 64.0672533 90.9689405 2023-Oct-30 03:00 0.395540640145 23.0071580 63.9202521 90.8677306 2023-Oct-30 06:00 0.397210056127 23.2445400 63.7726131 90.7650488 2023-Oct-30 09:00 0.398896438777 23.4772292 63.6243848 90.6609549 2023-Oct-30 12:00 0.400599451013 23.7052725 63.4756145 90.5555077 2023-Oct-30 15:00 0.402318759213 23.9287186 63.3263483 90.4487649 2023-Oct-30 18:00 0.404054033310 24.1476175 63.1766310 90.3407830 2023-Oct-30 21:00 0.405804946896 24.3620205 63.0265062 90.2316174 2023-Oct-31 00:00 0.407571177298 24.5719799 62.8760166 90.1213223 $$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/horizons_batch.txt scripts https://ssd.jpl.nasa.gov/ftp/ssd/SCRIPTS Author : Jon.D.Giorgini@jpl.nasa.gov ******************************************************************************* !$$SOF COMMAND = '90000090' QUANTITIES = '19,22' START_TIME = '2023-10-15' STEP_SIZE = '3 hours' STOP_TIME = '2023-10-31'