******************************************************************************* JPL/HORIZONS 12P/Pons-Brooks 2024-May-20 13:26:45 Rec #:90000223 (+COV) Soln.date: 2024-May-14_12:51:15 # obs: 7843 (1953-2024) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2460202.5 ! 2023-Sep-15.0000000 (TDB) RMSW= n.a. EC= .9545604021343332 QR= .780863418843884 TP= 2460421.6315025329 OM= 255.8551012302765 W= 198.9880403452053 IN= 74.1908513997041 A= 17.18464633319056 MA= 356.9682178436606 ADIST= 33.58842924753724 PER= 71.23921089090901 N= .013835446 ANGMOM= .021251693 DAN= 15.67299 DDN= .80218 L= 81.21052330000001 B= -18.243947 MOID= .181381 TP= 2024-Apr-21.1315025329 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 5. M2= 11. k1= 15. k2= 10. PHCOF= n.a. COMET comments 1: soln ref.= JPL#K242/63, data arc: 1953-06-20 to 2024-05-01 2: k1=15.0, k2=10.0; ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Mon May 20 13:26:45 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: 12P/Pons-Brooks {source: JPL#K242/63} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2024-Jun-01 00:00:00.0000 UT Stop time : A.D. 2024-Jun-04 00:00:00.0000 UT Step-size : 60 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.240517.p240810 EOP coverage : DATA-BASED 1962-JAN-20 TO 2024-MAY-17. PREDICTS-> 2024-AUG-09 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= 2460202.5 ! 2023-Sep-15.0000000 (TDB) RMSW= n.a. EC= .9545604021343332 QR= .780863418843884 TP= 2460421.6315025329 OM= 255.8551012302765 W= 198.9880403452053 IN= 74.1908513997041 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X= 6.282248838029983E-01 Y=-2.169926855266044E+00 Z= 2.384688937518528E+00 VX=-1.323344654172063E-04 VY= 1.207649244975588E-02 VZ=-4.134149846123034E-03 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 5. M2= 11. k1= 15. k2= 10. PHCOF= n.a. *************************************************************************************** Date__(UT)__HR:MN delta deldot S-O-T /r RNG_3sigma RNGRT_3sig *************************************************************************************** $$SOE 2024-Jun-01 00:00 1.54618087394871 -0.4104622 44.2682 /T 339.2277 0.0000800 2024-Jun-01 01:00 1.54617114854086 -0.3977945 44.2970 /T 339.2668 0.0000800 2024-Jun-01 02:00 1.54616172827800 -0.3851022 44.3259 /T 339.3058 0.0000800 2024-Jun-01 03:00 1.54615261375150 -0.3723853 44.3547 /T 339.3445 0.0000800 2024-Jun-01 04:00 1.54614380555234 -0.3596439 44.3835 /T 339.3829 0.0000800 2024-Jun-01 05:00 1.54613530427112 -0.3468780 44.4123 /T 339.4211 0.0000799 2024-Jun-01 06:00 1.54612711049803 -0.3340875 44.4412 /T 339.4590 0.0000799 2024-Jun-01 07:00 1.54611922482285 -0.3212726 44.4700 /T 339.4967 0.0000799 2024-Jun-01 08:00 1.54611164783499 -0.3084331 44.4988 /T 339.5342 0.0000799 2024-Jun-01 09:00 1.54610438012344 -0.2955692 44.5276 /T 339.5714 0.0000798 2024-Jun-01 10:00 1.54609742227680 -0.2826808 44.5564 /T 339.6083 0.0000798 2024-Jun-01 11:00 1.54609077488329 -0.2697680 44.5852 /T 339.6450 0.0000798 2024-Jun-01 12:00 1.54608443853071 -0.2568308 44.6139 /T 339.6815 0.0000798 2024-Jun-01 13:00 1.54607841380647 -0.2438692 44.6427 /T 339.7177 0.0000798 2024-Jun-01 14:00 1.54607270129761 -0.2308832 44.6715 /T 339.7537 0.0000797 2024-Jun-01 15:00 1.54606730159074 -0.2178728 44.7003 /T 339.7894 0.0000797 2024-Jun-01 16:00 1.54606221527210 -0.2048380 44.7290 /T 339.8249 0.0000797 2024-Jun-01 17:00 1.54605744292751 -0.1917790 44.7578 /T 339.8601 0.0000797 2024-Jun-01 18:00 1.54605298514243 -0.1786956 44.7865 /T 339.8950 0.0000796 2024-Jun-01 19:00 1.54604884250190 -0.1655879 44.8153 /T 339.9298 0.0000796 2024-Jun-01 20:00 1.54604501559057 -0.1524559 44.8440 /T 339.9642 0.0000796 2024-Jun-01 21:00 1.54604150499270 -0.1392996 44.8728 /T 339.9984 0.0000796 2024-Jun-01 22:00 1.54603831129217 -0.1261191 44.9015 /T 340.0324 0.0000795 2024-Jun-01 23:00 1.54603543507243 -0.1129144 44.9302 /T 340.0661 0.0000795 2024-Jun-02 00:00 1.54603287691658 -0.0996854 44.9589 /T 340.0996 0.0000795 2024-Jun-02 01:00 1.54603063740731 -0.0864322 44.9877 /T 340.1328 0.0000795 2024-Jun-02 02:00 1.54602871712690 -0.0731549 45.0164 /T 340.1658 0.0000795 2024-Jun-02 03:00 1.54602711665726 -0.0598533 45.0451 /T 340.1985 0.0000794 2024-Jun-02 04:00 1.54602583657990 -0.0465276 45.0738 /T 340.2310 0.0000794 2024-Jun-02 05:00 1.54602487747594 -0.0331778 45.1025 /T 340.2632 0.0000794 2024-Jun-02 06:00 1.54602423992610 -0.0198038 45.1311 /T 340.2952 0.0000794 2024-Jun-02 07:00 1.54602392451073 -0.0064058 45.1598 /T 340.3269 0.0000793 2024-Jun-02 08:00 1.54602393180976 0.0070164 45.1885 /T 340.3583 0.0000793 2024-Jun-02 09:00 1.54602426240274 0.0204626 45.2172 /T 340.3895 0.0000793 2024-Jun-02 10:00 1.54602491686884 0.0339329 45.2458 /T 340.4205 0.0000793 2024-Jun-02 11:00 1.54602589578682 0.0474273 45.2745 /T 340.4512 0.0000793 2024-Jun-02 12:00 1.54602719973507 0.0609456 45.3031 /T 340.4816 0.0000792 2024-Jun-02 13:00 1.54602882929156 0.0744880 45.3318 /T 340.5118 0.0000792 2024-Jun-02 14:00 1.54603078503389 0.0880544 45.3604 /T 340.5418 0.0000792 2024-Jun-02 15:00 1.54603306753927 0.1016447 45.3890 /T 340.5715 0.0000792 2024-Jun-02 16:00 1.54603567738450 0.1152591 45.4177 /T 340.6009 0.0000791 2024-Jun-02 17:00 1.54603861514602 0.1288973 45.4463 /T 340.6301 0.0000791 2024-Jun-02 18:00 1.54604188139984 0.1425595 45.4749 /T 340.6590 0.0000791 2024-Jun-02 19:00 1.54604547672162 0.1562456 45.5035 /T 340.6877 0.0000791 2024-Jun-02 20:00 1.54604940168659 0.1699556 45.5321 /T 340.7161 0.0000791 2024-Jun-02 21:00 1.54605365686962 0.1836895 45.5607 /T 340.7443 0.0000790 2024-Jun-02 22:00 1.54605824284516 0.1974472 45.5893 /T 340.7722 0.0000790 2024-Jun-02 23:00 1.54606316018729 0.2112288 45.6179 /T 340.7999 0.0000790 2024-Jun-03 00:00 1.54606840946970 0.2250342 45.6464 /T 340.8273 0.0000790 2024-Jun-03 01:00 1.54607399126567 0.2388635 45.6750 /T 340.8544 0.0000789 2024-Jun-03 02:00 1.54607990614810 0.2527165 45.7036 /T 340.8813 0.0000789 2024-Jun-03 03:00 1.54608615468950 0.2665933 45.7321 /T 340.9080 0.0000789 2024-Jun-03 04:00 1.54609273746198 0.2804939 45.7607 /T 340.9344 0.0000789 2024-Jun-03 05:00 1.54609965503726 0.2944183 45.7892 /T 340.9605 0.0000788 2024-Jun-03 06:00 1.54610690798668 0.3083663 45.8177 /T 340.9864 0.0000788 2024-Jun-03 07:00 1.54611449688115 0.3223381 45.8463 /T 341.0120 0.0000788 2024-Jun-03 08:00 1.54612242229123 0.3363336 45.8748 /T 341.0374 0.0000788 2024-Jun-03 09:00 1.54613068478707 0.3503528 45.9033 /T 341.0625 0.0000788 2024-Jun-03 10:00 1.54613928493841 0.3643957 45.9318 /T 341.0873 0.0000787 2024-Jun-03 11:00 1.54614822331462 0.3784622 45.9603 /T 341.1119 0.0000787 2024-Jun-03 12:00 1.54615750048466 0.3925523 45.9888 /T 341.1363 0.0000787 2024-Jun-03 13:00 1.54616711701709 0.4066660 46.0173 /T 341.1603 0.0000787 2024-Jun-03 14:00 1.54617707348010 0.4208034 46.0458 /T 341.1842 0.0000786 2024-Jun-03 15:00 1.54618737044146 0.4349643 46.0742 /T 341.2077 0.0000786 2024-Jun-03 16:00 1.54619800846855 0.4491489 46.1027 /T 341.2311 0.0000786 2024-Jun-03 17:00 1.54620898812834 0.4633569 46.1312 /T 341.2541 0.0000786 2024-Jun-03 18:00 1.54622030998743 0.4775885 46.1596 /T 341.2769 0.0000786 2024-Jun-03 19:00 1.54623197461201 0.4918437 46.1880 /T 341.2994 0.0000785 2024-Jun-03 20:00 1.54624398256785 0.5061223 46.2165 /T 341.3217 0.0000785 2024-Jun-03 21:00 1.54625633442035 0.5204244 46.2449 /T 341.3437 0.0000785 2024-Jun-03 22:00 1.54626903073449 0.5347500 46.2733 /T 341.3655 0.0000785 2024-Jun-03 23:00 1.54628207207487 0.5490990 46.3017 /T 341.3870 0.0000784 2024-Jun-04 00:00 1.54629545900565 0.5634715 46.3301 /T 341.4083 0.0000784 $$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. STATISTICAL UNCERTAINTIES Output includes formal +/- 3 standard-deviation statistical orbit uncertainty quantities. There is a 99.7% (1-D) or 98.9% (2-D) chance the actual value is within given bounds. These statistical calculations assume observational data errors are random. If there are systematic biases (such as timing, reduction or star-catalog errors), results can be optimistic. Because the epoch covariance is mapped using linearized variational partial derivatives, results can also be optimistic for times far from the solution epoch, particularly for objects having close planetary encounters. 'delta deldot' = Apparent range ("delta", light-time aberrated) and range-rate ("delta-dot") of the target center relative to the observer. A positive "deldot" means the target center is moving away from the observer, negative indicates movement toward the observer. Units: AU and KM/S 'S-O-T /r' = Sun-Observer-Target apparent SOLAR ELONGATION ANGLE seen from the observers' location at print-time. The '/r' column provides a code indicating the targets' apparent position relative to the Sun in the observers' sky, as described below: Case A: For an observing location on the surface of a rotating body, that body rotational sense is considered: /T indicates target TRAILS Sun (evening sky: rises and sets AFTER Sun) /L indicates target LEADS Sun (morning sky: rises and sets BEFORE Sun) Case B: For an observing point that does not have a rotational model (such as a spacecraft), the "leading" and "trailing" condition is defined by the observers' heliocentric ORBITAL motion: * If continuing in the observers' current direction of heliocentric motion would encounter the targets' apparent longitude first, followed by the Sun's, the target LEADS the Sun as seen by the observer. * If the Sun's apparent longitude would be encountered first, followed by the targets', the target TRAILS the Sun. Two other codes can be output: /* indicates observer is Sun-centered (undefined) /? Target is aligned with Sun center (no lead or trail) The S-O-T solar elongation angle is numerically the minimum separation angle of the Sun and target in the sky in any direction. It does NOT indicate the amount of separation in the leading or trailing directions, which would be defined along the equator of a spherical coordinate system. Units: DEGREES 'RNG_3sigma RNGRT_3sig' = Range and range rate (radial velocity) formal 3-standard-deviation uncertainties. Units: KM, 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 = '90000223' QUANTITIES = '20,23,39' START_TIME = '2024-Jun-01' STEP_SIZE = '1 hours' STOP_TIME = '2024-Jun-04'