******************************************************************************* JPL/HORIZONS 2P/Encke 2024-Mar-29 06:20:55 Rec #:90000033 Soln.date: - # obs: 28 (1795-1819) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2380640.5 ! 1805-Nov-15.0000000 (TDB) RMSW= n.a. EC= .8465279999999999 QR= .340645 TP= 2380647.4863999998 OM= 337.1517 W= 182.3076 IN= 13.5936 A= 2.219590544203502 MA= 357.9176763959923 ADIST= 4.098536088407004 PER= 3.3068728859941 N= .298053877 ANGMOM= .013643016 DAN= 4.08028 DDN= .34077 L= 159.3947248 B= -.5422249 TP= 1805-Nov-21.9863999998 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.= SAO/1805 2: k1=4.5;epoch may be 2380641.0 (hour ambiguous: 12h/0h); non-gravs. considered; 2 ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Fri Mar 29 06:20:55 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: 2P/Encke {source: SAO/180520} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2061-Jul-28 17:00:00.0000 UT Stop time : A.D. 2061-Jul-28 18:00:00.0000 UT Step-size : 1 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.240328.p240621 EOP coverage : DATA-BASED 1962-JAN-20 TO 2024-MAR-28. PREDICTS-> 2024-JUN-20 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= 2380640.5 ! 1805-Nov-15.0000000 (TDB) RMSW= n.a. EC= .8465279999999999 QR= .340645 TP= 2380647.4863999998 OM= 337.1517 W= 182.3076 IN= 13.5936 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X=-1.758176057824745E-01 Y= 2.894454273264921E-01 Z= 1.903892803437910E-01 VX=-2.548278225873354E-02 VY=-2.056271848469509E-02 VZ=-1.782721933867479E-02 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 2061-Jul-28 17:00 3.243480639348 9.7649663 2061-Jul-28 17:01 3.243484555859 9.7649390 2061-Jul-28 17:02 3.243488472358 9.7649118 2061-Jul-28 17:03 3.243492388847 9.7648845 2061-Jul-28 17:04 3.243496305324 9.7648573 2061-Jul-28 17:05 3.243500221791 9.7648300 2061-Jul-28 17:06 3.243504138246 9.7648028 2061-Jul-28 17:07 3.243508054691 9.7647755 2061-Jul-28 17:08 3.243511971125 9.7647483 2061-Jul-28 17:09 3.243515887548 9.7647210 2061-Jul-28 17:10 3.243519803959 9.7646937 2061-Jul-28 17:11 3.243523720360 9.7646665 2061-Jul-28 17:12 3.243527636751 9.7646392 2061-Jul-28 17:13 3.243531553130 9.7646120 2061-Jul-28 17:14 3.243535469498 9.7645847 2061-Jul-28 17:15 3.243539385855 9.7645575 2061-Jul-28 17:16 3.243543302201 9.7645302 2061-Jul-28 17:17 3.243547218537 9.7645030 2061-Jul-28 17:18 3.243551134861 9.7644757 2061-Jul-28 17:19 3.243555051175 9.7644485 2061-Jul-28 17:20 3.243558967477 9.7644212 2061-Jul-28 17:21 3.243562883769 9.7643939 2061-Jul-28 17:22 3.243566800049 9.7643667 2061-Jul-28 17:23 3.243570716319 9.7643394 2061-Jul-28 17:24 3.243574632578 9.7643122 2061-Jul-28 17:25 3.243578548826 9.7642849 2061-Jul-28 17:26 3.243582465063 9.7642577 2061-Jul-28 17:27 3.243586381289 9.7642304 2061-Jul-28 17:28 3.243590297504 9.7642032 2061-Jul-28 17:29 3.243594213708 9.7641759 2061-Jul-28 17:30 3.243598129901 9.7641487 2061-Jul-28 17:31 3.243602046083 9.7641214 2061-Jul-28 17:32 3.243605962255 9.7640942 2061-Jul-28 17:33 3.243609878415 9.7640669 2061-Jul-28 17:34 3.243613794565 9.7640397 2061-Jul-28 17:35 3.243617710703 9.7640124 2061-Jul-28 17:36 3.243621626831 9.7639851 2061-Jul-28 17:37 3.243625542947 9.7639579 2061-Jul-28 17:38 3.243629459053 9.7639306 2061-Jul-28 17:39 3.243633375148 9.7639034 2061-Jul-28 17:40 3.243637291232 9.7638761 2061-Jul-28 17:41 3.243641207304 9.7638489 2061-Jul-28 17:42 3.243645123366 9.7638216 2061-Jul-28 17:43 3.243649039417 9.7637944 2061-Jul-28 17:44 3.243652955458 9.7637671 2061-Jul-28 17:45 3.243656871487 9.7637399 2061-Jul-28 17:46 3.243660787505 9.7637126 2061-Jul-28 17:47 3.243664703512 9.7636854 2061-Jul-28 17:48 3.243668619509 9.7636581 2061-Jul-28 17:49 3.243672535494 9.7636309 2061-Jul-28 17:50 3.243676451469 9.7636036 2061-Jul-28 17:51 3.243680367432 9.7635764 2061-Jul-28 17:52 3.243684283385 9.7635491 2061-Jul-28 17:53 3.243688199327 9.7635219 2061-Jul-28 17:54 3.243692115257 9.7634946 2061-Jul-28 17:55 3.243696031177 9.7634674 2061-Jul-28 17:56 3.243699947086 9.7634401 2061-Jul-28 17:57 3.243703862984 9.7634128 2061-Jul-28 17:58 3.243707778871 9.7633856 2061-Jul-28 17:59 3.243711694747 9.7633583 2061-Jul-28 18:00 3.243715610612 9.7633311 $$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 = '90000033' START_TIME = '2061-Jul-28 17:00' STOP_TIME = '2061-Jul-28 18:00' STEP_SIZE = '1 min' QUANTITIES = '19'