API VERSION: 1.2 API SOURCE: NASA/JPL Horizons API ******************************************************************************* JPL/HORIZONS 103P/Hartley 2 2024-May-20 11:50:42 Rec #:90000956 (+COV) Soln.date: 2024-May-14_12:48:35 # obs: 2800 (2017-2024) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2460145.5 ! 2023-Jul-20.0000000 (TDB) RMSW= n.a. EC= .6938063720725233 QR= 1.064091671684831 TP= 2460230.0140010589 OM= 219.750657077732 W= 181.3014283949065 IN= 13.61020319425178 A= 3.475224742223785 MA= 347.142444931665 ADIST= 5.88635781276274 PER= 6.4786205708376 N= .152135207 ANGMOM= .023094196 DAN= 5.88292 DDN= 1.0642 L= 41.0155523 B= -.306221 MOID= .0710869 TP= 2023-Oct-12.5140010589 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= .800 M1= 16. M2= n.a. k1= 4.5 k2= n.a. PHCOF= n.a. COMET comments 1: soln ref.= JPL#K232/26, data arc: 2017-10-21 to 2024-05-05 2: k1=4.5; ******************************************************************************* ******************************************************************************* Ephemeris / API_USER Mon May 20 11:50:42 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: 103P/Hartley 2 {source: JPL#K232/26} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2030-Apr-03 00:00:00.0000 UT Stop time : A.D. 2030-Apr-08 00:00:00.0000 UT Step-size : 180 minutes ******************************************************************************* Target pole/equ : undefined Target radii : 0.8 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.240517.p240810 EOP coverage : DATA-BASED 1962-JAN-20 TO 2024-MAY-17. PREDICTS-> 2024-AUG-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= 2460145.5 ! 2023-Jul-20.0000000 (TDB) RMSW= n.a. EC= .6938063720725233 QR= 1.064091671684831 TP= 2460230.0140010589 OM= 219.750657077732 W= 181.3014283949065 IN= 13.61020319425178 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X= 1.239490134868575E+00 Y=-9.090711717750704E-01 Z=-1.457841684596144E-02 VX= 1.650360552874714E-03 VY= 1.674495132881649E-02 VZ= 4.091142644727695E-03 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= .800 M1= 16. M2= n.a. k1= 4.5 k2= n.a. PHCOF= n.a. ******************************************************************************* Date__(UT)__HR:MN r rdot ************************************************** $$SOE 2030-Apr-03 00:00 1.068594599239 -0.7655956 2030-Apr-03 03:00 1.068540729429 -0.7267690 2030-Apr-03 06:00 1.068489662977 -0.6879339 2030-Apr-03 09:00 1.068441400476 -0.6490908 2030-Apr-03 12:00 1.068395942490 -0.6102401 2030-Apr-03 15:00 1.068353289547 -0.5713823 2030-Apr-03 18:00 1.068313442145 -0.5325178 2030-Apr-03 21:00 1.068276400747 -0.4936471 2030-Apr-04 00:00 1.068242165786 -0.4547707 2030-Apr-04 03:00 1.068210737660 -0.4158889 2030-Apr-04 06:00 1.068182116736 -0.3770023 2030-Apr-04 09:00 1.068156303346 -0.3381113 2030-Apr-04 12:00 1.068133297791 -0.2992163 2030-Apr-04 15:00 1.068113100340 -0.2603179 2030-Apr-04 18:00 1.068095711226 -0.2214164 2030-Apr-04 21:00 1.068081130654 -0.1825123 2030-Apr-05 00:00 1.068069358791 -0.1436061 2030-Apr-05 03:00 1.068060395775 -0.1046983 2030-Apr-05 06:00 1.068054241710 -0.0657892 2030-Apr-05 09:00 1.068050896666 -0.0268793 2030-Apr-05 12:00 1.068050360682 0.0120308 2030-Apr-05 15:00 1.068052633764 0.0509409 2030-Apr-05 18:00 1.068057715883 0.0898503 2030-Apr-05 21:00 1.068065606979 0.1287587 2030-Apr-06 00:00 1.068076306960 0.1676655 2030-Apr-06 03:00 1.068089815700 0.2065704 2030-Apr-06 06:00 1.068106133039 0.2454729 2030-Apr-06 09:00 1.068125258787 0.2843725 2030-Apr-06 12:00 1.068147192719 0.3232688 2030-Apr-06 15:00 1.068171934577 0.3621613 2030-Apr-06 18:00 1.068199484072 0.4010496 2030-Apr-06 21:00 1.068229840882 0.4399332 2030-Apr-07 00:00 1.068263004651 0.4788116 2030-Apr-07 03:00 1.068298974990 0.5176845 2030-Apr-07 06:00 1.068337751480 0.5565513 2030-Apr-07 09:00 1.068379333666 0.5954116 2030-Apr-07 12:00 1.068423721063 0.6342650 2030-Apr-07 15:00 1.068470913151 0.6731109 2030-Apr-07 18:00 1.068520909379 0.7119490 2030-Apr-07 21:00 1.068573709164 0.7507788 2030-Apr-08 00:00 1.068629311888 0.7895999 $$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 *******************************************************************************