******************************************************************************* JPL/HORIZONS 12P/Pons-Brooks 2024-May-01 22:53:16 Rec #:90000223 (+COV) Soln.date: 2024-Apr-29_15:04:30 # obs: 7764 (1953-2024) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2460201.5 ! 2023-Sep-14.0000000 (TDB) RMSW= n.a. EC= .9545602321210124 QR= .7808647072011008 TP= 2460421.6315896292 OM= 255.8550487198595 W= 198.988008579359 IN= 74.1908389894113 A= 17.18461038975048 MA= 356.9543716368921 ADIST= 33.58835607229985 PER= 71.23898738491501 N= .01383549 ANGMOM= .021251709 DAN= 15.67302 DDN= .80218 L= 81.2104653 B= -18.2439154 MOID= .181446 TP= 2024-Apr-21.1315896292 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#K242/61, data arc: 1953-06-20 to 2024-04-19 2: k1=15.0, k2=10.0; ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Wed May 1 22:53:16 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: 12P/Pons-Brooks {source: JPL#K242/61} 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.240501.p240725 EOP coverage : DATA-BASED 1962-JAN-20 TO 2024-MAY-01. PREDICTS-> 2024-JUL-24 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= 2460201.5 ! 2023-Sep-14.0000000 (TDB) RMSW= n.a. EC= .9545602321210124 QR= .7808647072011008 TP= 2460421.6315896292 OM= 255.8550487198595 W= 198.988008579359 IN= 74.1908389894113 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X= 6.283545260894083E-01 Y=-2.181994326134274E+00 Z= 2.388813173497006E+00 VX=-1.271069889007513E-04 VY= 1.205841645754723E-02 VZ=-4.114318311673151E-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 1.54618085194703 -0.4104628 44.2682 /T 343.6342 0.0000811 2024-Jun-01 01:00 1.54617112652427 -0.3977951 44.2970 /T 343.6734 0.0000811 2024-Jun-01 02:00 1.54616170624655 -0.3851028 44.3259 /T 343.7123 0.0000811 2024-Jun-01 03:00 1.54615259170523 -0.3723859 44.3547 /T 343.7510 0.0000811 2024-Jun-01 04:00 1.54614378349132 -0.3596445 44.3835 /T 343.7895 0.0000811 2024-Jun-01 05:00 1.54613528219538 -0.3468786 44.4123 /T 343.8277 0.0000810 2024-Jun-01 06:00 1.54612708840762 -0.3340881 44.4412 /T 343.8656 0.0000810 2024-Jun-01 07:00 1.54611920271783 -0.3212732 44.4700 /T 343.9033 0.0000810 2024-Jun-01 08:00 1.54611162571540 -0.3084337 44.4988 /T 343.9408 0.0000810 2024-Jun-01 09:00 1.54610435798934 -0.2955698 44.5276 /T 343.9780 0.0000809 2024-Jun-01 10:00 1.54609740012823 -0.2826814 44.5564 /T 344.0149 0.0000809 2024-Jun-01 11:00 1.54609075272031 -0.2697686 44.5852 /T 344.0516 0.0000809 2024-Jun-01 12:00 1.54608441635336 -0.2568314 44.6139 /T 344.0881 0.0000809 2024-Jun-01 13:00 1.54607839161481 -0.2438698 44.6427 /T 344.1243 0.0000808 2024-Jun-01 14:00 1.54607267909168 -0.2308837 44.6715 /T 344.1602 0.0000808 2024-Jun-01 15:00 1.54606727937060 -0.2178734 44.7003 /T 344.1959 0.0000808 2024-Jun-01 16:00 1.54606219303779 -0.2048386 44.7290 /T 344.2313 0.0000808 2024-Jun-01 17:00 1.54605742067909 -0.1917796 44.7578 /T 344.2665 0.0000808 2024-Jun-01 18:00 1.54605296287994 -0.1786962 44.7865 /T 344.3015 0.0000807 2024-Jun-01 19:00 1.54604882022539 -0.1655885 44.8153 /T 344.3361 0.0000807 2024-Jun-01 20:00 1.54604499330010 -0.1524565 44.8440 /T 344.3706 0.0000807 2024-Jun-01 21:00 1.54604148268832 -0.1393002 44.8728 /T 344.4047 0.0000807 2024-Jun-01 22:00 1.54603828897392 -0.1261197 44.9015 /T 344.4387 0.0000806 2024-Jun-01 23:00 1.54603541274037 -0.1129150 44.9302 /T 344.4723 0.0000806 2024-Jun-02 00:00 1.54603285457076 -0.0996860 44.9590 /T 344.5057 0.0000806 2024-Jun-02 01:00 1.54603061504777 -0.0864328 44.9877 /T 344.5389 0.0000806 2024-Jun-02 02:00 1.54602869475370 -0.0731554 45.0164 /T 344.5718 0.0000805 2024-Jun-02 03:00 1.54602709427045 -0.0598539 45.0451 /T 344.6045 0.0000805 2024-Jun-02 04:00 1.54602581417952 -0.0465282 45.0738 /T 344.6369 0.0000805 2024-Jun-02 05:00 1.54602485506205 -0.0331784 45.1025 /T 344.6690 0.0000805 2024-Jun-02 06:00 1.54602421749876 -0.0198044 45.1311 /T 344.7009 0.0000805 2024-Jun-02 07:00 1.54602390206997 -0.0064063 45.1598 /T 344.7325 0.0000804 2024-Jun-02 08:00 1.54602390935564 0.0070158 45.1885 /T 344.7639 0.0000804 2024-Jun-02 09:00 1.54602423993532 0.0204621 45.2172 /T 344.7950 0.0000804 2024-Jun-02 10:00 1.54602489438816 0.0339324 45.2458 /T 344.8259 0.0000804 2024-Jun-02 11:00 1.54602587329294 0.0474267 45.2745 /T 344.8565 0.0000803 2024-Jun-02 12:00 1.54602717722802 0.0609451 45.3031 /T 344.8869 0.0000803 2024-Jun-02 13:00 1.54602880677141 0.0744875 45.3318 /T 344.9170 0.0000803 2024-Jun-02 14:00 1.54603076250069 0.0880538 45.3604 /T 344.9468 0.0000803 2024-Jun-02 15:00 1.54603304499306 0.1016442 45.3890 /T 344.9764 0.0000803 2024-Jun-02 16:00 1.54603565482534 0.1152585 45.4177 /T 345.0057 0.0000802 2024-Jun-02 17:00 1.54603859257396 0.1288968 45.4463 /T 345.0348 0.0000802 2024-Jun-02 18:00 1.54604185881493 0.1425590 45.4749 /T 345.0636 0.0000802 2024-Jun-02 19:00 1.54604545412391 0.1562451 45.5035 /T 345.0922 0.0000802 2024-Jun-02 20:00 1.54604937907613 0.1699551 45.5321 /T 345.1205 0.0000801 2024-Jun-02 21:00 1.54605363424646 0.1836890 45.5607 /T 345.1485 0.0000801 2024-Jun-02 22:00 1.54605822020935 0.1974467 45.5893 /T 345.1763 0.0000801 2024-Jun-02 23:00 1.54606313753889 0.2112283 45.6179 /T 345.2038 0.0000801 2024-Jun-03 00:00 1.54606838680876 0.2250337 45.6464 /T 345.2311 0.0000800 2024-Jun-03 01:00 1.54607396859223 0.2388630 45.6750 /T 345.2581 0.0000800 2024-Jun-03 02:00 1.54607988346222 0.2527160 45.7036 /T 345.2849 0.0000800 2024-Jun-03 03:00 1.54608613199123 0.2665928 45.7321 /T 345.3114 0.0000800 2024-Jun-03 04:00 1.54609271475138 0.2804934 45.7607 /T 345.3376 0.0000800 2024-Jun-03 05:00 1.54609963231437 0.2944178 45.7892 /T 345.3636 0.0000799 2024-Jun-03 06:00 1.54610688525155 0.3083658 45.8177 /T 345.3893 0.0000799 2024-Jun-03 07:00 1.54611447413384 0.3223376 45.8463 /T 345.4148 0.0000799 2024-Jun-03 08:00 1.54612239953179 0.3363331 45.8748 /T 345.4400 0.0000799 2024-Jun-03 09:00 1.54613066201554 0.3503523 45.9033 /T 345.4649 0.0000798 2024-Jun-03 10:00 1.54613926215485 0.3643952 45.9318 /T 345.4896 0.0000798 2024-Jun-03 11:00 1.54614820051908 0.3784617 45.9603 /T 345.5140 0.0000798 2024-Jun-03 12:00 1.54615747767719 0.3925518 45.9888 /T 345.5382 0.0000798 2024-Jun-03 13:00 1.54616709419776 0.4066656 46.0173 /T 345.5621 0.0000797 2024-Jun-03 14:00 1.54617705064894 0.4208029 46.0458 /T 345.5857 0.0000797 2024-Jun-03 15:00 1.54618734759853 0.4349639 46.0742 /T 345.6091 0.0000797 2024-Jun-03 16:00 1.54619798561389 0.4491484 46.1027 /T 345.6322 0.0000797 2024-Jun-03 17:00 1.54620896526202 0.4633564 46.1312 /T 345.6551 0.0000797 2024-Jun-03 18:00 1.54622028710950 0.4775880 46.1596 /T 345.6777 0.0000796 2024-Jun-03 19:00 1.54623195172250 0.4918432 46.1880 /T 345.7000 0.0000796 2024-Jun-03 20:00 1.54624395966684 0.5061218 46.2165 /T 345.7221 0.0000796 2024-Jun-03 21:00 1.54625631150787 0.5204239 46.2449 /T 345.7439 0.0000796 2024-Jun-03 22:00 1.54626900781061 0.5347495 46.2733 /T 345.7654 0.0000795 2024-Jun-03 23:00 1.54628204913962 0.5490986 46.3017 /T 345.7867 0.0000795 2024-Jun-04 00:00 1.54629543605911 0.5634710 46.3301 /T 345.8077 0.0000795 $$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' START_TIME = '2024-Jun-01' STOP_TIME = '2024-Jun-04' STEP_SIZE = '1 hours' QUANTITIES = '20,23,39'