API VERSION: 1.2 API SOURCE: NASA/JPL Horizons API ******************************************************************************* JPL/HORIZONS 41P/Tuttle-Giacobini-Kresak 2024-May-05 23:22:50 Rec #:90000491 (+COV) Soln.date: 2023-Sep-29_16:16:14 # obs: 4300 (2016-2023) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2457857.5 ! 2017-Apr-14.0000000 (TDB) RMSW= n.a. EC= .6612733030060237 QR= 1.045042756187832 TP= 2457856.2529922365 OM= 141.0589723608447 W= 62.16674348896015 IN= 9.228465743613803 A= 3.085209301369051 MA= .2268016883234363 ADIST= 5.125375846550271 PER= 5.4191996379608 N= .181876725 ANGMOM= .022665694 DAN= 1.32654 DDN= 2.51153 L= 202.9163946 B= 8.1530729 MOID= .133724 TP= 2017-Apr-12.7529922365 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= .700 M1= 16.9 M2= n.a. k1= 4.5 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= 6.596751213074E-9 A2= -2.075555734336E-10 A3= 0. Standard model: ALN= .1112620426 NK= 4.6142 NM= 2.15 NN= 5.093 R0= 2.808 COMET comments 1: soln ref.= JPL#K222/6, data arc: 2016-11-10 to 2023-09-13 2: k1=4.5; ******************************************************************************* ******************************************************************************* Ephemeris / API_USER Sun May 5 23:22:50 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: 41P/Tuttle-Giacobini-Kresak {source: JPL#K222/6} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2028-Feb-12 00:00:00.0000 UT Stop time : A.D. 2028-Feb-18 00:00:00.0000 UT Step-size : 180 minutes ******************************************************************************* Target pole/equ : undefined Target radii : 0.7 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.240503.p240727 EOP coverage : DATA-BASED 1962-JAN-20 TO 2024-MAY-03. PREDICTS-> 2024-JUL-26 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= 2457857.5 ! 2017-Apr-14.0000000 (TDB) RMSW= n.a. EC= .6612733030060237 QR= 1.045042756187832 TP= 2457856.2529922365 OM= 141.0589723608447 W= 62.16674348896015 IN= 9.228465743613803 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X=-9.418730494981115E-01 Y=-4.519315921150638E-01 Z=-3.222604789017319E-02 VX= 8.941708549063712E-03 VY=-1.869654574808682E-02 VZ=-6.388455371315434E-03 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= .700 M1= 16.9 M2= n.a. k1= 4.5 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= 6.596751213074E-9 A2= -2.075555734336E-10 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 2028-Feb-12 00:00 1.050451597415 -1.0884837 2028-Feb-12 03:00 1.050374396756 -1.0502599 2028-Feb-12 06:00 1.050299956021 -1.0120237 2028-Feb-12 09:00 1.050228276093 -0.9737755 2028-Feb-12 12:00 1.050159357822 -0.9355158 2028-Feb-12 15:00 1.050093202025 -0.8972449 2028-Feb-12 18:00 1.050029809487 -0.8589634 2028-Feb-12 21:00 1.049969180961 -0.8206717 2028-Feb-13 00:00 1.049911317167 -0.7823702 2028-Feb-13 03:00 1.049856218791 -0.7440595 2028-Feb-13 06:00 1.049803886488 -0.7057399 2028-Feb-13 09:00 1.049754320879 -0.6674119 2028-Feb-13 12:00 1.049707522554 -0.6290759 2028-Feb-13 15:00 1.049663492068 -0.5907325 2028-Feb-13 18:00 1.049622229944 -0.5523821 2028-Feb-13 21:00 1.049583736673 -0.5140251 2028-Feb-14 00:00 1.049548012711 -0.4756619 2028-Feb-14 03:00 1.049515058484 -0.4372932 2028-Feb-14 06:00 1.049484874383 -0.3989192 2028-Feb-14 09:00 1.049457460767 -0.3605405 2028-Feb-14 12:00 1.049432817960 -0.3221574 2028-Feb-14 15:00 1.049410946257 -0.2837706 2028-Feb-14 18:00 1.049391845915 -0.2453804 2028-Feb-14 21:00 1.049375517162 -0.2069872 2028-Feb-15 00:00 1.049361960192 -0.1685917 2028-Feb-15 03:00 1.049351175165 -0.1301941 2028-Feb-15 06:00 1.049343162208 -0.0917949 2028-Feb-15 09:00 1.049337921416 -0.0533947 2028-Feb-15 12:00 1.049335452850 -0.0149939 2028-Feb-15 15:00 1.049335756538 0.0234072 2028-Feb-15 18:00 1.049338832477 0.0618079 2028-Feb-15 21:00 1.049344680627 0.1002079 2028-Feb-16 00:00 1.049353300919 0.1386067 2028-Feb-16 03:00 1.049364693247 0.1770038 2028-Feb-16 06:00 1.049378857476 0.2153988 2028-Feb-16 09:00 1.049395793435 0.2537912 2028-Feb-16 12:00 1.049415500922 0.2921805 2028-Feb-16 15:00 1.049437979699 0.3305664 2028-Feb-16 18:00 1.049463229499 0.3689484 2028-Feb-16 21:00 1.049491250018 0.4073259 2028-Feb-17 00:00 1.049522040923 0.4456986 2028-Feb-17 03:00 1.049555601844 0.4840659 2028-Feb-17 06:00 1.049591932382 0.5224275 2028-Feb-17 09:00 1.049631032101 0.5607828 2028-Feb-17 12:00 1.049672900536 0.5991314 2028-Feb-17 15:00 1.049717537187 0.6374729 2028-Feb-17 18:00 1.049764941520 0.6758068 2028-Feb-17 21:00 1.049815112971 0.7141327 2028-Feb-18 00:00 1.049868050941 0.7524500 $$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 *******************************************************************************