API VERSION: 1.2 API SOURCE: NASA/JPL Horizons API ******************************************************************************* JPL/HORIZONS 45P/Honda-Mrkos-Pajdusakova 2024-May-13 11:45:37 Rec #:90000535 (+COV) Soln.date: 2022-Jul-19_02:06:34 # obs: 1823 (2016-2022) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2457979.5 ! 2017-Aug-14.0000000 (TDB) RMSW= n.a. EC= .8239960779465374 QR= .532650151526285 TP= 2457753.7841481166 OM= 88.93460245064746 W= 326.3441984051743 IN= 4.248170541497252 A= 3.026353875026082 MA= 42.25582356031209 ADIST= 5.520057598525879 PER= 5.2648713820948 N= .187208046 ANGMOM= .016955649 DAN= .57629 DDN= 3.09293 L= 55.35148 B= -2.3528514 MOID= .0603555 TP= 2016-Dec-31.2841481166 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= .800 M1= 13.7 M2= 18. k1= 22. k2= 5. PHCOF= .030 Comet non-gravitational force model (AMRAT=m^2/kg;A1-A3=au/d^2;DT=days;R0=au): AMRAT= 0. DT= -25.83941 A1= 5.430524945259E-9 A2= 1.803847961128E-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#K222/7, data arc: 2016-11-05 to 2022-07-04 2: k1=22., k2=5., phase coef.=0.03; radar( 8 delay, 4 Dop.); ******************************************************************************* ******************************************************************************* Ephemeris / API_USER Mon May 13 11:45:38 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: 45P/Honda-Mrkos-Pajdusakova {source: JPL#K222/7} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2027-Aug-30 00:00:00.0000 UT Stop time : A.D. 2027-Sep-02 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.240510.p240803 EOP coverage : DATA-BASED 1962-JAN-20 TO 2024-MAY-10. PREDICTS-> 2024-AUG-02 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= 2457979.5 ! 2017-Aug-14.0000000 (TDB) RMSW= n.a. EC= .8239960779465374 QR= .532650151526285 TP= 2457753.7841481166 OM= 88.93460245064746 W= 326.3441984051743 IN= 4.248170541497252 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X=-2.805934480656318E+00 Y=-1.045629322500222E+00 Z=-2.277829469244435E-01 VX=-5.703634973900090E-03 VY=-7.651055867820054E-03 VZ=-2.867728072469801E-03 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= .800 M1= 13.7 M2= 18. k1= 22. k2= 5. PHCOF= .030 Comet non-gravitational force model (AMRAT=m^2/kg;A1-A3=au/d^2;DT=days;R0=au): AMRAT= 0. DT= -25.83941 A1= 5.430524945259E-9 A2= 1.803847961128E-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 ************************************************** $$SOE 2027-Aug-30 00:00 0.558939986969 -1.3387571 2027-Aug-30 03:00 0.558849386326 -1.1714512 2027-Aug-30 06:00 0.558770866645 -1.0040384 2027-Aug-30 09:00 0.558704435098 -0.8365339 2027-Aug-30 12:00 0.558650097754 -0.6689528 2027-Aug-30 15:00 0.558607859582 -0.5013106 2027-Aug-30 18:00 0.558577724444 -0.3336226 2027-Aug-30 21:00 0.558559695096 -0.1659040 2027-Aug-31 00:00 0.558553773187 0.0018298 2027-Aug-31 03:00 0.558559959256 0.1695633 2027-Aug-31 06:00 0.558578252736 0.3372813 2027-Aug-31 09:00 0.558608651950 0.5049685 2027-Aug-31 12:00 0.558651154115 0.6726094 2027-Aug-31 15:00 0.558705755340 0.8401887 2027-Aug-31 18:00 0.558772450631 1.0076912 2027-Aug-31 21:00 0.558851233889 1.1751016 2027-Sep-01 00:00 0.558942097916 1.3424047 2027-Sep-01 03:00 0.559045034414 1.5095852 2027-Sep-01 06:00 0.559160033993 1.6766280 2027-Sep-01 09:00 0.559287086170 1.8435181 2027-Sep-01 12:00 0.559426179377 2.0102404 2027-Sep-01 15:00 0.559577300961 2.1767800 2027-Sep-01 18:00 0.559740437194 2.3431219 2027-Sep-01 21:00 0.559915573274 2.5092514 2027-Sep-02 00:00 0.560102693333 2.6751536 $$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 *******************************************************************************