API VERSION: 1.2 API SOURCE: NASA/JPL Horizons API ******************************************************************************* JPL/HORIZONS 9P/Tempel 1 2025-Dec-12 17:58:40 Rec #:90000192 (+COV) Soln.date: 2025-Sep-22_14:16:11 # obs: 3279 (2008-2025) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2457466.5 ! 2016-Mar-19.0000000 (TDB) RMSW= n.a. EC= .509708377851476 QR= 1.542538943169848 TP= 2457603.070070303 OM= 68.75396340952473 W= 179.1967365307812 IN= 10.47340462300318 A= 3.146166227377564 MA= 335.8794553734231 ADIST= 4.749793511585281 PER= 5.5805974904918 N= .176616623 ANGMOM= .026251012 DAN= 4.74931 DDN= 1.54259 L= 247.9640811 B= .1460119 MOID= .52947801 TP= 2016-Aug-02.5700703030 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 non-gravitational force model (AMRAT=m^2/kg;A1-A3=au/d^2;DT=days;R0=au): AMRAT= 0. DT= 0. A1= 1.932882354595E-11 A2= 1.184702035971E-11 A3= 0. Standard model: ALN= .1112620426 NK= 4.6142 NM= 2.15 NN= 5.093 R0= 2.808 COMET comments 1: soln ref.= JPL#K284/1, data arc: 2008-10-25 to 2025-09-20 2: k1=9.; ******************************************************************************* ******************************************************************************* Ephemeris / API_USER Fri Dec 12 17:58:40 2025 Pasadena, USA / Horizons ******************************************************************************* Target body name: 9P/Tempel 1 {source: JPL#K284/1} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2084-Oct-11 00:00:00.0000 UT Stop time : A.D. 2084-Oct-17 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= 2457466.5 ! 2016-Mar-19.0000000 (TDB) RMSW= n.a. EC= .509708377851476 QR= 1.542538943169848 TP= 2457603.070070303 OM= 68.75396340952473 W= 179.1967365307812 IN= 10.47340462300318 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X=-1.971552006261484E+00 Y=-3.358283205004375E-02 Z= 3.640012779632891E-01 VX= 4.477497133873470E-03 VY=-1.158750001223558E-02 VZ=-6.839490429941641E-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. Comet non-gravitational force model (AMRAT=m^2/kg;A1-A3=au/d^2;DT=days;R0=au): AMRAT= 0. DT= 0. A1= 1.932882354595E-11 A2= 1.184702035971E-11 A3= 0. Standard model: ALN= .1112620426 NK= 4.6142 NM= 2.15 NN= 5.093 R0= 2.808 ******************************************************************************* Date__(UT)__HR:MN r rdot ************************************************** $$SOE 2084-Oct-11 00:00 1.981100016438 -0.1768047 2084-Oct-11 03:00 1.981087502626 -0.1698804 2084-Oct-11 06:00 1.981075488696 -0.1629559 2084-Oct-11 09:00 1.981063974665 -0.1560311 2084-Oct-11 12:00 1.981052960548 -0.1491062 2084-Oct-11 15:00 1.981042446361 -0.1421810 2084-Oct-11 18:00 1.981032432117 -0.1352556 2084-Oct-11 21:00 1.981022917831 -0.1283301 2084-Oct-12 00:00 1.981013903514 -0.1214043 2084-Oct-12 03:00 1.981005389181 -0.1144785 2084-Oct-12 06:00 1.980997374841 -0.1075524 2084-Oct-12 09:00 1.980989860507 -0.1006262 2084-Oct-12 12:00 1.980982846188 -0.0936999 2084-Oct-12 15:00 1.980976331894 -0.0867734 2084-Oct-12 18:00 1.980970317634 -0.0798468 2084-Oct-12 21:00 1.980964803415 -0.0729201 2084-Oct-13 00:00 1.980959789247 -0.0659934 2084-Oct-13 03:00 1.980955275135 -0.0590665 2084-Oct-13 06:00 1.980951261085 -0.0521395 2084-Oct-13 09:00 1.980947747104 -0.0452125 2084-Oct-13 12:00 1.980944733196 -0.0382854 2084-Oct-13 15:00 1.980942219365 -0.0313583 2084-Oct-13 18:00 1.980940205615 -0.0244311 2084-Oct-13 21:00 1.980938691948 -0.0175038 2084-Oct-14 00:00 1.980937678368 -0.0105766 2084-Oct-14 03:00 1.980937164874 -0.0036493 2084-Oct-14 06:00 1.980937151468 0.0032779 2084-Oct-14 09:00 1.980937638150 0.0102052 2084-Oct-14 12:00 1.980938624920 0.0171325 2084-Oct-14 15:00 1.980940111776 0.0240597 2084-Oct-14 18:00 1.980942098717 0.0309869 2084-Oct-14 21:00 1.980944585739 0.0379140 2084-Oct-15 00:00 1.980947572839 0.0448412 2084-Oct-15 03:00 1.980951060015 0.0517682 2084-Oct-15 06:00 1.980955047260 0.0586952 2084-Oct-15 09:00 1.980959534570 0.0656221 2084-Oct-15 12:00 1.980964521938 0.0725489 2084-Oct-15 15:00 1.980970009358 0.0794756 2084-Oct-15 18:00 1.980975996824 0.0864022 2084-Oct-15 21:00 1.980982484325 0.0933287 2084-Oct-16 00:00 1.980989471855 0.1002551 2084-Oct-16 03:00 1.980996959404 0.1071813 2084-Oct-16 06:00 1.981004946961 0.1141074 2084-Oct-16 09:00 1.981013434516 0.1210334 2084-Oct-16 12:00 1.981022422057 0.1279591 2084-Oct-16 15:00 1.981031909573 0.1348847 2084-Oct-16 18:00 1.981041897051 0.1418102 2084-Oct-16 21:00 1.981052384477 0.1487354 2084-Oct-17 00:00 1.981063371838 0.1556604 $$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 *******************************************************************************