******************************************************************************* JPL/HORIZONS 9P/Tempel 1 2025-Dec-12 21:16:20 Rec #:90000191 (+COV) Soln.date: 2022-Apr-18_09:24:43 # obs: 2468 (2005-2019) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2456515.5 ! 2013-Aug-11.0000000 (TDB) RMSW= n.a. EC= .5127479467379373 QR= 1.528812071337991 TP= 2455571.7706460631 OM= 68.88292835560593 W= 179.3348230804617 IN= 10.515562974301 A= 3.137620582823358 MA= 167.3597041908014 ADIST= 4.746429094308725 PER= 5.5578758347201 N= .177338665 ANGMOM= .026160243 DAN= 4.74609 DDN= 1.52885 L= 248.2289219 B= .1213939 MOID= .514422 TP= 2011-Jan-10.2706460631 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= 3. M1= 12.9 M2= n.a. k1= 9. k2= n.a. PHCOF= n.a. COMET comments 1: soln ref.= JPL#K163/6, data arc: 2005-10-02 to 2019-01-02 2: k1=9.; ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Fri Dec 12 21:16:20 2025 Pasadena, USA / Horizons ******************************************************************************* Target body name: 9P/Tempel 1 {source: JPL#K163/6} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2028-Feb-08 00:00:00.0000 UT Stop time : A.D. 2028-Feb-16 00:00:00.0000 UT Step-size : 180 minutes ******************************************************************************* Target pole/equ : IAU {East-longitude positive} Target radii : 3.1, 2.1, 2.1 km {Equator_a, b, pole_c} 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= 2456515.5 ! 2013-Aug-11.0000000 (TDB) RMSW= n.a. EC= .5127479467379373 QR= 1.528812071337991 TP= 2455571.7706460631 OM= 68.88292835560593 W= 179.3348230804617 IN= 10.515562974301 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X= 2.105864602932843E+00 Y= 3.916857888825898E+00 Z= 1.609326040366471E+00 VX=-4.648492879927392E-03 VY= 2.235076517589561E-03 VZ= 2.055388861735743E-03 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= 3. M1= 12.9 M2= n.a. k1= 9. k2= n.a. PHCOF= n.a. ******************************************************************************* Date__(UT)__HR:MN r rdot ************************************************** $$SOE 2028-Feb-08 00:00 1.772048273893 -0.3324085 2028-Feb-08 03:00 1.772024616256 -0.3229619 2028-Feb-08 06:00 1.772001640651 -0.3135147 2028-Feb-08 09:00 1.771979347126 -0.3040668 2028-Feb-08 12:00 1.771957735723 -0.2946183 2028-Feb-08 15:00 1.771936806486 -0.2851692 2028-Feb-08 18:00 1.771916559457 -0.2757196 2028-Feb-08 21:00 1.771896994675 -0.2662694 2028-Feb-09 00:00 1.771878112180 -0.2568187 2028-Feb-09 03:00 1.771859912008 -0.2473675 2028-Feb-09 06:00 1.771842394196 -0.2379158 2028-Feb-09 09:00 1.771825558780 -0.2284636 2028-Feb-09 12:00 1.771809405791 -0.2190110 2028-Feb-09 15:00 1.771793935263 -0.2095579 2028-Feb-09 18:00 1.771779147225 -0.2001044 2028-Feb-09 21:00 1.771765041708 -0.1906506 2028-Feb-10 00:00 1.771751618740 -0.1811963 2028-Feb-10 03:00 1.771738878346 -0.1717417 2028-Feb-10 06:00 1.771726820552 -0.1622867 2028-Feb-10 09:00 1.771715445383 -0.1528314 2028-Feb-10 12:00 1.771704752860 -0.1433758 2028-Feb-10 15:00 1.771694743005 -0.1339200 2028-Feb-10 18:00 1.771685415839 -0.1244638 2028-Feb-10 21:00 1.771676771378 -0.1150074 2028-Feb-11 00:00 1.771668809641 -0.1055508 2028-Feb-11 03:00 1.771661530644 -0.0960940 2028-Feb-11 06:00 1.771654934400 -0.0866370 2028-Feb-11 09:00 1.771649020923 -0.0771798 2028-Feb-11 12:00 1.771643790225 -0.0677225 2028-Feb-11 15:00 1.771639242315 -0.0582650 2028-Feb-11 18:00 1.771635377204 -0.0488074 2028-Feb-11 21:00 1.771632194898 -0.0393497 2028-Feb-12 00:00 1.771629695405 -0.0298920 2028-Feb-12 03:00 1.771627878728 -0.0204341 2028-Feb-12 06:00 1.771626744872 -0.0109763 2028-Feb-12 09:00 1.771626293839 -0.0015184 2028-Feb-12 12:00 1.771626525629 0.0079395 2028-Feb-12 15:00 1.771627440243 0.0173974 2028-Feb-12 18:00 1.771629037678 0.0268552 2028-Feb-12 21:00 1.771631317931 0.0363130 2028-Feb-13 00:00 1.771634280998 0.0457707 2028-Feb-13 03:00 1.771637926872 0.0552283 2028-Feb-13 06:00 1.771642255548 0.0646859 2028-Feb-13 09:00 1.771647267015 0.0741432 2028-Feb-13 12:00 1.771652961264 0.0836005 2028-Feb-13 15:00 1.771659338284 0.0930575 2028-Feb-13 18:00 1.771666398061 0.1025144 2028-Feb-13 21:00 1.771674140583 0.1119711 2028-Feb-14 00:00 1.771682565833 0.1214276 2028-Feb-14 03:00 1.771691673795 0.1308838 2028-Feb-14 06:00 1.771701464451 0.1403398 2028-Feb-14 09:00 1.771711937781 0.1497954 2028-Feb-14 12:00 1.771723093764 0.1592508 2028-Feb-14 15:00 1.771734932379 0.1687059 2028-Feb-14 18:00 1.771747453601 0.1781606 2028-Feb-14 21:00 1.771760657407 0.1876150 2028-Feb-15 00:00 1.771774543769 0.1970690 2028-Feb-15 03:00 1.771789112660 0.2065226 2028-Feb-15 06:00 1.771804364051 0.2159758 2028-Feb-15 09:00 1.771820297912 0.2254286 2028-Feb-15 12:00 1.771836914211 0.2348809 2028-Feb-15 15:00 1.771854212915 0.2443328 2028-Feb-15 18:00 1.771872193991 0.2537841 2028-Feb-15 21:00 1.771890857401 0.2632350 2028-Feb-16 00:00 1.771910203110 0.2726854 $$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/horizons_batch.txt scripts https://ssd.jpl.nasa.gov/ftp/ssd/SCRIPTS Author : Jon.D.Giorgini@jpl.nasa.gov ******************************************************************************* !$$SOF COMMAND = '90000191' QUANTITIES = '19' START_TIME = '2028-Feb-08' STEP_SIZE = '3 hours' STOP_TIME = '2028-Feb-16'