******************************************************************************* JPL/HORIZONS 65P/Gunn 2024-Apr-23 01:18:16 Rec #:90000686 (+COV) Soln.date: 2023-Oct-19_01:07:48 # obs: 2067 (2013-2023) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2458083.5 ! 2017-Nov-26.0000000 (TDB) RMSW= n.a. EC= .2499710815328111 QR= 2.910058035402613 TP= 2458043.3201521849 OM= 62.01746027400281 W= 213.5450724997194 IN= 9.185307592249787 A= 3.879927778451276 MA= 5.181755283647324 ADIST= 4.849797521499939 PER= 7.6426446060318 N= .128964035 ANGMOM= .032808188 DAN= 4.59475 DDN= 3.01032 L= 275.2228381 B= -5.0605984 MOID= 1.89906001 TP= 2017-Oct-16.8201521849 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= 5.4 M1= 10.3 M2= n.a. k1= 8.75 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= -5.709884643555E-8 A2= -1.796596288681E-8 A3= 1.432119011879E-8 Standard model: ALN= .1112620426 NK= 4.6142 NM= 2.15 NN= 5.093 R0= 2.808 COMET comments 1: soln ref.= JPL#K171/26, data arc: 2013-09-23 to 2023-05-13 2: k1=8.75; ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Tue Apr 23 01:18:16 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: 65P/Gunn {source: JPL#K171/26} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2033-Apr-15 00:00:00.0000 UT Stop time : A.D. 2033-Apr-21 00:00:00.0000 UT Step-size : 180 minutes ******************************************************************************* Target pole/equ : undefined Target radii : 5.4 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.240422.p240716 EOP coverage : DATA-BASED 1962-JAN-20 TO 2024-APR-22. PREDICTS-> 2024-JUL-15 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= 2458083.5 ! 2017-Nov-26.0000000 (TDB) RMSW= n.a. EC= .2499710815328111 QR= 2.910058035402613 TP= 2458043.3201521849 OM= 62.01746027400281 W= 213.5450724997194 IN= 9.185307592249787 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X= 7.064618549878807E-01 Y=-2.455628875182803E+00 Z=-1.407198043117134E+00 VX= 1.088081611323112E-02 VY= 2.856852799275366E-03 VZ=-2.462434432071227E-04 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= 5.4 M1= 10.3 M2= n.a. k1= 8.75 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= -5.709884643555E-8 A2= -1.796596288681E-8 A3= 1.432119011879E-8 Standard model: ALN= .1112620426 NK= 4.6142 NM= 2.15 NN= 5.093 R0= 2.808 ******************************************************************************* Date__(UT)__HR:MN r rdot ************************************************** $$SOE 2033-Apr-15 00:00 2.927059783992 0.9340081 2033-Apr-15 03:00 2.927127283931 0.9358312 2033-Apr-15 06:00 2.927194915483 0.9376539 2033-Apr-15 09:00 2.927262678627 0.9394764 2033-Apr-15 12:00 2.927330573343 0.9412986 2033-Apr-15 15:00 2.927398599610 0.9431205 2033-Apr-15 18:00 2.927466757405 0.9449421 2033-Apr-15 21:00 2.927535046709 0.9467634 2033-Apr-16 00:00 2.927603467499 0.9485844 2033-Apr-16 03:00 2.927672019754 0.9504052 2033-Apr-16 06:00 2.927740703454 0.9522256 2033-Apr-16 09:00 2.927809518576 0.9540457 2033-Apr-16 12:00 2.927878465099 0.9558655 2033-Apr-16 15:00 2.927947543003 0.9576851 2033-Apr-16 18:00 2.928016752264 0.9595043 2033-Apr-16 21:00 2.928086092862 0.9613232 2033-Apr-17 00:00 2.928155564775 0.9631419 2033-Apr-17 03:00 2.928225167982 0.9649602 2033-Apr-17 06:00 2.928294902461 0.9667782 2033-Apr-17 09:00 2.928364768189 0.9685960 2033-Apr-17 12:00 2.928434765147 0.9704134 2033-Apr-17 15:00 2.928504893311 0.9722305 2033-Apr-17 18:00 2.928575152659 0.9740474 2033-Apr-17 21:00 2.928645543171 0.9758639 2033-Apr-18 00:00 2.928716064824 0.9776801 2033-Apr-18 03:00 2.928786717596 0.9794960 2033-Apr-18 06:00 2.928857501465 0.9813117 2033-Apr-18 09:00 2.928928416410 0.9831270 2033-Apr-18 12:00 2.928999462408 0.9849420 2033-Apr-18 15:00 2.929070639437 0.9867567 2033-Apr-18 18:00 2.929141947475 0.9885711 2033-Apr-18 21:00 2.929213386499 0.9903852 2033-Apr-19 00:00 2.929284956489 0.9921989 2033-Apr-19 03:00 2.929356657421 0.9940124 2033-Apr-19 06:00 2.929428489273 0.9958256 2033-Apr-19 09:00 2.929500452022 0.9976384 2033-Apr-19 12:00 2.929572545648 0.9994510 2033-Apr-19 15:00 2.929644770126 1.0012632 2033-Apr-19 18:00 2.929717125435 1.0030751 2033-Apr-19 21:00 2.929789611553 1.0048867 2033-Apr-20 00:00 2.929862228456 1.0066980 2033-Apr-20 03:00 2.929934976122 1.0085090 2033-Apr-20 06:00 2.930007854529 1.0103197 2033-Apr-20 09:00 2.930080863654 1.0121301 2033-Apr-20 12:00 2.930154003475 1.0139401 2033-Apr-20 15:00 2.930227273968 1.0157498 2033-Apr-20 18:00 2.930300675111 1.0175593 2033-Apr-20 21:00 2.930374206881 1.0193684 2033-Apr-21 00:00 2.930447869255 1.0211771 $$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 ******************************************************************************* !$$SOF COMMAND = '90000686' START_TIME = '2033-Apr-15' STOP_TIME = '2033-Apr-21' STEP_SIZE = '3 hours' QUANTITIES = '19'