API VERSION: 1.2 API SOURCE: NASA/JPL Horizons API ******************************************************************************* JPL/HORIZONS 49P/Arend-Rigaux 2024-May-06 21:20:50 Rec #:90000577 (+COV) Soln.date: 2024-Apr-29_15:04:58 # obs: 3393 (2004-2024) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2455881.5 ! 2011-Nov-16.0000000 (TDB) RMSW= n.a. EC= .6003391250937498 QR= 1.423830453319025 TP= 2455853.579061951 OM= 118.8764301459823 W= 332.7906161678267 IN= 19.05043208250439 A= 3.562596548018411 MA= 4.092456904484557 ADIST= 5.701362642717797 PER= 6.7244716412924 N= .146573045 ANGMOM= .02596669 DAN= 1.4855 DDN= 4.88874 L= 92.9576612 B= -8.583143 MOID= .46304101 TP= 2011-Oct-19.0790619510 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= 4.24 M1= 14.3 M2= n.a. k1= 5.5 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= 151.7412 A1= -1.330953929573E-10 A2= 4.639799240977E-11 A3= 3.413226082921E-10 Standard model: ALN= .1112620426 NK= 4.6142 NM= 2.15 NN= 5.093 R0= 2.808 COMET comments 1: soln ref.= JPL#K254/14, data arc: 2004-06-24 to 2024-04-23 2: k1=5.5; ******************************************************************************* ******************************************************************************* Ephemeris / API_USER Mon May 6 21:20:50 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: 49P/Arend-Rigaux {source: JPL#K254/14} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2025-Apr-07 00:00:00.0000 UT Stop time : A.D. 2025-Apr-13 00:00:00.0000 UT Step-size : 180 minutes ******************************************************************************* Target pole/equ : undefined Target radii : 4.24 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.240506.p240730 EOP coverage : DATA-BASED 1962-JAN-20 TO 2024-MAY-06. PREDICTS-> 2024-JUL-29 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= 2455881.5 ! 2011-Nov-16.0000000 (TDB) RMSW= n.a. EC= .6003391250937498 QR= 1.423830453319025 TP= 2455853.579061951 OM= 118.8764301459823 W= 332.7906161678267 IN= 19.05043208250439 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X=-5.507303253800631E-01 Y= 1.259984812241100E+00 Z= 4.827593427532013E-01 VX=-1.658216792361430E-02 VY=-5.908525299075970E-03 VZ= 3.626487117796911E-03 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= 4.24 M1= 14.3 M2= n.a. k1= 5.5 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= 151.7412 A1= -1.330953929573E-10 A2= 4.639799240977E-11 A3= 3.413226082921E-10 Standard model: ALN= .1112620426 NK= 4.6142 NM= 2.15 NN= 5.093 R0= 2.808 ******************************************************************************* Date__(UT)__HR:MN r rdot ************************************************** $$SOE 2025-Apr-07 00:00 1.431922393436 -0.5427018 2025-Apr-07 03:00 1.431883889453 -0.5240065 2025-Apr-07 06:00 1.431846735210 -0.5053089 2025-Apr-07 09:00 1.431810930871 -0.4866090 2025-Apr-07 12:00 1.431776476593 -0.4679070 2025-Apr-07 15:00 1.431743372528 -0.4492030 2025-Apr-07 18:00 1.431711618822 -0.4304969 2025-Apr-07 21:00 1.431681215612 -0.4117890 2025-Apr-08 00:00 1.431652163035 -0.3930793 2025-Apr-08 03:00 1.431624461216 -0.3743678 2025-Apr-08 06:00 1.431598110278 -0.3556547 2025-Apr-08 09:00 1.431573110337 -0.3369401 2025-Apr-08 12:00 1.431549461502 -0.3182239 2025-Apr-08 15:00 1.431527163878 -0.2995063 2025-Apr-08 18:00 1.431506217562 -0.2807875 2025-Apr-08 21:00 1.431486622646 -0.2620674 2025-Apr-09 00:00 1.431468379217 -0.2433461 2025-Apr-09 03:00 1.431451487354 -0.2246238 2025-Apr-09 06:00 1.431435947132 -0.2059005 2025-Apr-09 09:00 1.431421758619 -0.1871762 2025-Apr-09 12:00 1.431408921876 -0.1684512 2025-Apr-09 15:00 1.431397436962 -0.1497254 2025-Apr-09 18:00 1.431387303924 -0.1309990 2025-Apr-09 21:00 1.431378522809 -0.1122719 2025-Apr-10 00:00 1.431371093654 -0.0935444 2025-Apr-10 03:00 1.431365016492 -0.0748165 2025-Apr-10 06:00 1.431360291350 -0.0560883 2025-Apr-10 09:00 1.431356918247 -0.0373598 2025-Apr-10 12:00 1.431354897198 -0.0186311 2025-Apr-10 15:00 1.431354228212 0.0000976 2025-Apr-10 18:00 1.431354911291 0.0188263 2025-Apr-10 21:00 1.431356946433 0.0375550 2025-Apr-11 00:00 1.431360333627 0.0562835 2025-Apr-11 03:00 1.431365072859 0.0750117 2025-Apr-11 06:00 1.431371164106 0.0937396 2025-Apr-11 09:00 1.431378607343 0.1124670 2025-Apr-11 12:00 1.431387402535 0.1311940 2025-Apr-11 15:00 1.431397549644 0.1499204 2025-Apr-11 18:00 1.431409048624 0.1686461 2025-Apr-11 21:00 1.431421899425 0.1873711 2025-Apr-12 00:00 1.431436101988 0.2060953 2025-Apr-12 03:00 1.431451656252 0.2248185 2025-Apr-12 06:00 1.431468562148 0.2435407 2025-Apr-12 09:00 1.431486819599 0.2622619 2025-Apr-12 12:00 1.431506428526 0.2809819 2025-Apr-12 15:00 1.431527388842 0.2997007 2025-Apr-12 18:00 1.431549700454 0.3184181 2025-Apr-12 21:00 1.431573363262 0.3371341 2025-Apr-13 00:00 1.431598377163 0.3558487 $$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 *******************************************************************************