******************************************************************************* JPL/HORIZONS 209P/LINEAR 2024-May-22 20:37:29 Rec #:90001161 (+COV) Soln.date: 2024-May-14_12:42:30 # obs: 2862 (2003-2024) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2456053.5 ! 2012-May-06.0000000 (TDB) RMSW= n.a. EC= .6839596173510102 QR= .930847081655659 TP= 2456776.565500875 OM= 62.92573613360325 W= 152.6365620827428 IN= 21.26657838289615 A= 2.945342218147812 MA= 219.013324173156 ADIST= 4.959837354639966 PER= 5.0548915922792 N= .194984653 ANGMOM= .021537062 DAN= 3.99295 DDN= .97516 L= 217.1777969 B= 9.5967305 MOID= .0331197 TP= 2014-Apr-29.0655008750 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 18.1 M2= n.a. k1= 4.5 k2= n.a. PHCOF= n.a. COMET comments 1: soln ref.= JPL#150, data arc: 2003-12-03 to 2024-05-09 2: k1=4.5; radar( 9 delay, 4 Dop.); ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Wed May 22 20:37:29 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: 209P/LINEAR {source: JPL#150} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2024-Jul-13 00:00:00.0000 UT Stop time : A.D. 2024-Jul-16 00:00:00.0000 UT Step-size : 180 minutes ******************************************************************************* Target pole/equ : undefined Target radii : undefined 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.240522.p240815 EOP coverage : DATA-BASED 1962-JAN-20 TO 2024-MAY-22. PREDICTS-> 2024-AUG-14 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= 2456053.5 ! 2012-May-06.0000000 (TDB) RMSW= n.a. EC= .6839596173510102 QR= .930847081655659 TP= 2456776.565500875 OM= 62.92573613360325 W= 152.6365620827428 IN= 21.26657838289615 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X= 3.254817987087077E+00 Y= 3.398046619123634E+00 Z= 9.161055888346120E-01 VX=-4.099352902341510E-03 VY= 9.432832252133420E-04 VZ= 2.301258225300057E-03 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 18.1 M2= n.a. k1= 4.5 k2= n.a. PHCOF= n.a. ******************************************************************************* Date__(UT)__HR:MN r rdot ************************************************** $$SOE 2024-Jul-13 00:00 0.964658829994 -0.5581318 2024-Jul-13 03:00 0.964620208982 -0.5117655 2024-Jul-13 06:00 0.964584935711 -0.4653912 2024-Jul-13 09:00 0.964553010730 -0.4190097 2024-Jul-13 12:00 0.964524434534 -0.3726217 2024-Jul-13 15:00 0.964499207569 -0.3262278 2024-Jul-13 18:00 0.964477330226 -0.2798289 2024-Jul-13 21:00 0.964458802845 -0.2334256 2024-Jul-14 00:00 0.964443625714 -0.1870187 2024-Jul-14 03:00 0.964431799069 -0.1406088 2024-Jul-14 06:00 0.964423323093 -0.0941968 2024-Jul-14 09:00 0.964418197918 -0.0477833 2024-Jul-14 12:00 0.964416423622 -0.0013691 2024-Jul-14 15:00 0.964418000232 0.0450452 2024-Jul-14 18:00 0.964422927723 0.0914587 2024-Jul-14 21:00 0.964431206018 0.1378708 2024-Jul-15 00:00 0.964442834986 0.1842808 2024-Jul-15 03:00 0.964457814446 0.2306879 2024-Jul-15 06:00 0.964476144164 0.2770914 2024-Jul-15 09:00 0.964497823853 0.3234906 2024-Jul-15 12:00 0.964522853175 0.3698848 2024-Jul-15 15:00 0.964551231739 0.4162732 2024-Jul-15 18:00 0.964582959102 0.4626551 2024-Jul-15 21:00 0.964618034771 0.5090298 2024-Jul-16 00:00 0.964656458197 0.5553966 $$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 = '209P' QUANTITIES = '19' START_TIME = '2024-Jul-13' STEP_SIZE = '3 hours' STOP_TIME = '2024-Jul-16'